illusions (and optical tricks): astigmatic blur, barrier-grid animation, the Ponzo illusion, etc. #video
#Clickspring 8 tips on hand filing #machining #video #toread
#Prelinger archive on “fundamentals of” hand filing from 01942 #machining #video #toread
hand filing 101 #machining #video Lots of time-wasting video of text and 3-D animations with some dumbfuck reading a script very, very slowly over it, while astoundingly shitty music plays. Does contain some actual information, but no actual tutorial content, despite the misleading video title.
#Fireball-Tool whether hand filing backwards is bad or not #machining #video #toread #todelete
Make magazine on hand filing #machining #video worthless, not worth watching at all
basics of filing #machining #video quite good
hand-forged file #machining #video #toread
how 19th-century files were made #manufacturing #video by #Ken-Hawley, MBE, died 02014
#Clickspring on hand cutting precision file teeth. Nothing especially precision about the teeth; they’re just eyeballed. #machining #video
hand filing for blacksmiths #machining #video recommends buying NOS (new old stock) files rather than new Nicholson ones that have been outsourced to Brazil or Mexico; thinks maybe new Grobet files from China or India might be okay but hasn’t tried them.
#Blondihacks on making filing buttons for hand filing #machining #video
sharpening dull files in acid #machining #video apparently vinegar for 8 hours or sulfuric acid for 40 minutes sharpens dull files effectively
restoring rusted files #machining #video starting with cleaning the teeth with an X-Acto knife, one tooth at a time, and steel wool, and denatured alcohol, and a file card. Then he uses electrolysis to remove the actual rust with sodium carbonate (half a cup in 5ℓ of water). He just used a 12-volt battery charger at about 3 amps for 4–8 hours. Then he had to clean the teeth again. Then he used acid etching to sharpen the teeth, because (he says) it works better than electrolysis, overnight in a bath of vinegar, a liter of 4% acetic acid, which he later neutralizes on the files with baking soda. Then he polishes with scotch-brite and protects with WD-40.
restoring and sharpening an antique file #machining #video #toread
sharpening a knife with a spark plug #machining #video demonstrates terrible knife technique on a tomato. Horrible elevator music. Then demonstrates obviously #fakenews #misinformation sharpening technique using the gap between two jam nuts on a bolt chucked up in a drill. Then demonstrates “sharpening” a different knife, evidently freshly sharpened on a grindstone, on the bottom of a ceramic mug, a technique which can work, though probably not with the movement demonstrated. ("Creative Hacker" gets killfiled!) Then a third knife, already evidently fairly sharp, finally demonstrates the supposed sparkplug technique: the plug is held in a vise to be hacksawed through the metal part, permitting the separation of the sintered sapphire insert, which apparently has an unglazed section where the metal covered it, which is used with the same ineffective movement to sharpen this third knife.
sharpening a knife with spark plugs #machining #video #toread
sharpening a knife with cigarette lighter wheels? #machining #video he basically nails two of the hardened file rings from the middle of the wheels onto a board and drags the knife between them, using them as non-rotating files. Then he demonstrates cutting paper with the burr.
#Tech-Ingredients high-emissivity paint for their #cooling panels. Yes, it’s barium sulfate. #video #toread
#Bushcraft Filipino guy #Primitive-Life smelting iron to make a knife from natural materials, and I think Roman cement too. Lashes members to live trees to make a hut, which greatly simplifies climbing (no tripod needed). Early footage was originally shot in an interlaced format (1080i?) before upload to YT. This guy seems like he might be the real deal; no steel saw marks or backhoe marks visible. Bamboo is a huge win for cutting difficulty vs. stiffness, especially for drilling with stone flakes and for splits. Makes a green bamboo chair and table; holes drilled in bamboo enable a sewing-like lashing technique to secure butt joints, but lacking diagonal braces results in undue stress on lashed joints. Uses ground-squatting technique. Grass hut permits indoor work in the rainy season. Tropical climate permits outdoor work in rain. Fishing lines provide food to cook on spits over fire to serve on leaf plates. Bamboo water vessel permits boiling water next to fire; requires towel to grip. Firestarting technique not shown. Bow and arrow demonstrated. All that was from 02017. In 02018, river rock path and brick masonry well shown. Bamboo latticework fencing is built to protect what looks like a chicken coop. A score sawn with a stone saw around green bamboo facilitates clean breakage. In addition to celt axe, lashed-head stone axe is shown to split bamboo. Bamboo caps fit tightly onto bamboo pipes or other vessels with appropriate choice of diameter, making a nearly watertight seal. A gourd-bucket dipper on a bamboo handle is used to draw water from brick well with protective cement roof supported on wood rafters. Ramrods are used to break out internal partitions in long bamboo to make a long vessel. Stone saw is wedged into split-wood handle which is lashed tight to provide better handling. Some yam harvest is on floor; perhaps more is in large wicker and lashed-bamboo baskets. Hand drill is used not for firestarting but for drilling a round hole in large bamboo (side or partition); stone point lashed into split end improves drilling action. Split bamboo vessel permits melting adhesive (pine pitch?) over fire with charcoal filler; poured over bamboo–bamboo joints of small bamboo fit into round hole drilled in larger bamboo, it yields watertight joint seals for automatic vacuum-controlled trough for watering chickens. Chicken coop seems to be adobe (or, more likely, wattle and daub) with narrow latticework bamboo doors and windows, perhaps to keep out varmints; the door hinge is a round vertical member of the door in a round hole. Bamboo trowel facilitates plastering with adobe to hold trough in place atop bricks inside chicken coop. All that was 02018. He’s got an awful lot of bricks that look awfully gray, including what may be a water tower, and this video doesn’t show making them; these may be cheating. Bamboo rake serves to gather dry forest litter. Roof thatching clamped into split bamboo is shown; a smelting shelter with thatch but no walls has large river rocks around the edge of a raised floor made from red clay brought in in wicker baskets, then tamped down by beating with poles. Fire pit in floor is built up with adobe; flexible paddle hand fan (a cut banan leaf?) fans fire. Adobe grille over fire (presumably to permit eventually moving the fire on top of it so it can get fed with air from below) is initially supported by bamboo rafters. Yes; charcoal fire on top of grille is shown later. Then he uses actual anthracite coal for a smelt, which is possibly also cheating, but smelts many grams of iron. He seems to mixing the iron ore with some kind of a flux as well as crushed charcoal. He has a gazebo made of masonry with river rocks with gray mortar that must be close to a tonne; it’s unlikely he’s made that from wood ash! Fresh banana leaves serve well to support clay discs as they are rotated and moved from place to place. A second smelting furnace of a similar design is built next to the first. Severe cracking in the first suggests no fiber was added to the adobe, and too much clay. A conical hole is drilled in a river rock with another rock; the appearance of the dust suggests that the drillee is marble or limestone. The clay discs are wood-fired in the second furnace. A drill bit is ground onto the end of a stone and lashed into a split bamboo rod. A centrifugal blower similar to the Primitive Technology design, but using a split bamboo shaft, is installed in the floor to blow both furnaces, using the conical hole as a bearing, resting on a ground stone point. The fired clay discs are used as blower cover and flywheel; the fan shaft is driven with a pullstring mechanism similar to a yo-yo, with a bamboo pull handle on the end of twine. A second smelt also produced iron. Later a horizontal chimney extension was built (not shown) supported on a river-rock masonry wall with adobe mortar, perhaps in order to be able to cover the top of the furnace. A skimmer apparently made from wicker or a tiny lashed bamboo lattice serves to remove floating debris from the water in a clay decantation pit; levigated clay is removed off the top with a pottery dipper, which seems to be fired from a white ball clay or kaolin, neither of which I’ve seen him dig. The dipped-out orange clay is decanted in a pot to get a smooth, pure, highly plastic clay (with a lot of contraction on drying). He seems to be firing it without any temper! But, miraculously, the pieces survive; these are his crucibles and molds for trying to cast what looks like hundreds of grams of iron prills into a knife, edge down, and a chisel. Unbelievably, this does succeed, and he grinds them sharp on a rock afterward, a huge upgrade for his woodworking. Further heating in an anthracite forge made of river rocks enables some forging, using split-bamboo tongs and rocks as hammer and anvil, forming a tang that permits the attachment of a handle to the iron knife with the pitch-like hot-melt adhesive; the iron knife edge can shave bamboo. All this was in 02019. In 02020 his grass hut had fallen down, but at some point he had built a masonry pool or cistern next to the well. He makes a straw-style broom from bamboo splits using the new knife. Finally at 54'35" he shows #firestarting, with a hand drill and pine needles; he’s using a sharpened wood stick. He removes two trees by building fires at their bases, then pushing them over with a long pole. At this point he’s removed the thatched roof over the smelting furnaces; he repairs their cracks a bit with more adobe. Two wicker carriers suspend wicker baskets from a pole over his shoulder, permitting him to carry a greater load of river rocks back from the river. He breaks up a lot of big limestone rocks and burns them to quicklime, which he uses in a heap of sand (brought in in baskets) to make mortar to build a stone house from river rocks, so maybe all that cement I saw before wasn’t cheating, but that mortar sure does look a lot more like portland cement than it does like lime mortar when wet; but it seems to set pretty white. He makes a third celt-like axe, this time with half a bamboo bent double around the head before lashing tight. Splitting a log with stone wedges and wood stakes is a lot of work. A ground-stone wood chisel (much wider than his iron chisel) is surprisingly precise at surfacing wood, raising quite a respectable shaving, and between the two chisels he cuts some quite respectable mortise and tenon joints for the stone house’s doorframe. Doorframes, plural. He builds a third furnace from the materials of the first two to burn still more lime; when the stone walls are finally done, they have peaks for a pitched roof and notches in them for rafters. Over a packed dirt layer for the floor he lays lime mortar, surfaced it with large river rocks. For troweling the mortar flat before adding the stones, he uses a stone trowel. Bamboo bars in the windows are evidently designed to keep large varmints out, held in place with lime mortar, stones, and lashing. He gashes several pine trees at the base with the bamboo “celt” to produce pine pitch, placing palm leaves to collect the pitch. Young hardwood logs are mortared in place atop the stone walls as rafters. He chisels a round hole in the doorway’s threshold, and a corresponding one in the lintel, for a hinge. After harvesting and splitting numerous three-meter bamboo poles, he pounds the splits flat, then weaves them into several three-meter-square mats. Combining the tapped resin, foraged resin, and pounded charcoal, he makes his glue again, this time in a ceramic pot on a three-stone stove, and paints it onto his bamboo roof panels to be installed in the lower layers of the roof before installing them on the roof, perhaps to stick the layers together. #video (99 minutes long)
salvaging motors from floppy disk drives #hardware #bootstrapping #hoarding #video He doesn’t manage to nondestructively disassemble these NEC floppy drives; he suggests making a nut for their leadscrews by twisting some wire, which seems like it ought to work. Rather than trying to use the flat-flex cables, he solders directly to the motor pins. Demonstrates crimping Dupont pins onto the wires he soldered onto the motor. Then he wires them up to a couple of DRV8825 stepper driver chips and an #STM32 Blue Pill. Running them on 9 volts with a 100% duty cycle they got up to 90° (according to his thermocouple) and started to smell, for which he suggests using a different driver board called the “EasyDriver”. He uses Arduino’s LiquidCrystal_I2C.h to talk to his 16×2 LCD.
David Greenberg’s "Hitchhiker Tree" data structure #algorithms #video
#video from 02015 by "fullspectrumtechnician3798" on salvaging #microcontrollers for #hardware #electronics projects. Socketed DIPs are easiest to remove from the equipment. Old computer printer boards are one of his examples; he exhibits one with an UV-erasable 8748, which you can also “enable the external access” (I think this is pulling the EA pin high, maybe pin 7) to make it run a program from external ROM/RAM. He also exhibits what looks like a Packard Bell full-length ISA hard drive controller, saying, “normal Winchester drive controllers, pretty much all of them will have either an 8048 or 49 or 8051, usually...labeled, like, Winchester, something like WD1015.” He demonstrates one thus salvaged and hooked up to an external EPROM. Then he exhibits a full-height 5¼ IDE hard drive, saying they usually have an 8051, but this time he’s pointing to something like a PLCC. Then he exhibits an ISA modem card, which he says pretty much always has a microcontroller. He says the Winbond 78C31B on that modem is an 8051 (and therefore also has EA). “Some network cards like this old [ISA] LANTastic have a Zigalog Z80... luckily the serial chip, the RAM, and the CPU are all socketed.” Then he exhibits an old (01980s) UPS control board with a Philips 87C52E socketed DIP, which is another 8051. He says the MC6800 series is also useful even if preprogrammed, by using the “special functions” pins (?) to “tell them to boot off of an external ROM”. Though the one he shows is UV-erasable. Holding up a PLCC chip, he says hard drives, especially Western Digital, use the Intel 80C196 style, which is 16-bit but still has the “external access” pin. And he says keyboards often use the NEC D8048-8C, which is of course an 8048. #bootstrapping #hoarding #video #scouting
SciPy 02020 BoF on driving hardware for instrumentation (HPIB, stuff like that) #hardware #video #toread
how to make a quill pin and draw with it, including tempering feathers etc. #bootstrapping #video
Battery less power supply and battery life calculation for embedded devices #hardware #video. An hour-long NPTEL lecture on “Design for the Internet of Things” from the “Indian Institute of Science” (?) in Bangalore, by T. V. Prabhakar. Seems like it might have a lot of talking-head footage, but there’s also some handwritten notes, Khan-Academy style. He’s explaining how batteries have lower efficiency at higher current draws; how ZigBee, Wi-Fi, BLE, LoRa, SigFox, NB-IoT, LTE-M, increase power draw; etc. He thinks you should design your systems for “!10 Years!”, which implies up to about 4μA of sleep current (for your radio, I think). He suggests buffering your batteries with capacitors (just in parallel with the battery) to improve battery efficiency by reducing the current spikes the battery has to cope with. Discusses self-discharge/internal leakage: some batteries are 0.5% per month, and shelf life is defined as the time until it falls below 80% of nominal capacity. He seems to have a very narrow definition of “IoT” of just sensor nodes transmitting sensor data back to an “aggregator” gateway. He says that, in the IoT world, sleep power consumption is time and time again the most significant power consumption, but still smaller than battery self-discharge.
#Bushcraft Filipino guy smelting iron into a fishhook #bootstrapping #video
“Amazing” #hardware Projects From Old Scrap Circuit Boards. Fake, removing components from salvage boards with tweezers without desoldering them. First project is an uncredited, unexplained Joule Thief cellphone charger that produces too-high unregulated output voltage (one commenter said, “When I plugged this into my phone everything blew up.”). Second one is a shitty high-distortion class-A darlington amp for an 8Ω paper cone speaker consisting of two NPN power transistors from a compact fluorescent lightbulb, a 220μF cap, and a 330Ω resistor. Still, he’s doing some cool #ghettobotics stuff with almost no materials or tools. By “Creative Goutam.” #bootstrapping #hoarding #video
Schottky diode bench testing #hardware #video but he seems to be measuring the time for the junction capacitance to discharge through a 220Ω resistor into a microcontroller output and confusing that with reverse recovery time?
Mod-01 Lec-37 Battery-Driven System Design (probably low-power stuff) #hardware #video #toread
Hantek LCR meter #hardware #metrology #video
#Electronoobs One axis PID encoded DC-motor leadscrew #control using triangular allthread or a decent leadscrew. But he doesn’t talk at all about PID tuning or backlash or preload, just super introductory stuff. #video
dancing cactus #teardown #video showing the potentially salvageable microcontroller #hardware
megaphone amplifier #hardware #electronics. A grounded-emitter amp (with no emitter degeneration!) with an 0.1μF cap on its base to a microphone feeding an emitter follower. Lots of talking-head filler. Didn’t bother to finish. #video
#Rinoa runs her 1920s Lenk Duplex Automatic Alcohol Blowtorch No.175 for the first time. #video #manufacturing
salvaging things from an old computer detailed #electronics dissection of a CD-ROM drive, extracting the head, the plastic gears, the ground dowel rail, the stepper leadscrew, and the brushless spindle. He hooks the spindle up to a power supply and sticks a propeller on it. Without a propeller he gets it up to 16000 rpm according to his laser tachometer. From the computer he also recovers a CPU cooler, the ATX power supply, a piezo buzzer, a power LED, and a floppy drive. He removes the connectors from the power supply but fails to look up what some of the wires are for, although he does somehow look up the use of the “turn on” green wire. Amusingly, his test for the 12-volt line was the same as mine: a car headlamp bulb. He charges a couple of 1.5-volt rechargeable AA cells (1100mAh) with the 3.3 to 5 volt difference, which I guess is pretty safe for Ni-Cd or NiMH cells. But then he inadvisably charges some bare lithium-ion cells with the 5-volt line dropped down to 4.4 volts with a series diode. Then he hooks up a 22-amp 12-volt DC motor to the 12-volt lines with a larger propeller, and then a 24-volt brushless motor (maybe salvaged from a printer) across the ±12V lines. Then he runs a 36-volt ebike motor from the ±12V lines. Then he charges a 12-volt lead-acid battery from the -3.3V and +12V lines with a diode to drop the voltage a bit. From the floppy drive he salvages the #brushless motor but can’t figure out how to use its driver board, so he hooks it up to an external ESC, the same one he used to drive the CD-ROM spindle motor. In order to desolder its windings he turns down his old soldering iron tip on a lathe. (I don’t remember having previously seen someone heatshrink tubing with a soldering iron.) The floppy drive motor goes 6000 rpm at 17V and 14000 rpm at 19V. #hoarding product-shill #video #hardware
#Fraser building a lampwork blowtorch #bootstrapping #manufacturing #video shows different oil lamp designs. He’s going to use a bellows and a check valve with a balloon reservoir I guess? Sort of like a pneumatic buck converter. Probably doesn’t have a bladder to use. Before he gets into #glassworking he demonstrates soldering copper with it. He’s using a check valve explained by Faraday, using a latex diaphragm similar to a bicycle Dunlop valve, though Faraday used cloth. He decided to use an (99% isopropyl) alcohol lamp instead of an oil lamp to get higher power and less smoke. On the fifth attempt he succeeded at sealing a test tube into a Hermetically sealed ampoule.
Japanese alcohol soldering blowtorch #video #toread #manufacturing
Fred Rash’s electric circle plane #flying #video #engineering using a 10mAh battery and a tiny propeller. It’s carbon-fiber rings, polyester film stretched over them, and balsa wood. No control surfaces, I think. The video has it flying around inside a roofed football field; the battery lasts a couple of minutes.
#PDF #paper from 02016 by Tomes and Finlayson: #bootstrapping an integrating sphere for #optics measurements; they painted it with barium sulfate suspended in PVA glue thinned in water for spraying, with five wet-on-wet coats followed by 10–15 (??) dry dust coats, getting 90–95% reflectance and a flatter spectrum than titanium dioxide, comparable to commercial Avian-B.
Reinforcing #3D-printed plastic parts (in this case a PETG axe handle) with stainless steel window screens, which have enough space between the wires to allow interlayer bonding. Probably around here fiberglass is the best option. He cut the screens to size but not shape with tin snips, then trimmed them after printing with the kind of small diagonal cutters used for trimming through-hole leads or zip ties. I thought maybe he would put them in between all the layers, but he seems to have stuck to just a single layer on the bottom, another on the top, and a totally useless one in the middle. For final trimming he resorted to dremeling off the wires with a cutoff disc, eventually deciding that’s just way too hard to make it safe to handle. #manufacturing #video
digging a Japanese #spider-hole and sleeping in it, 45' #video #stealth-camping Demonstrates how the right-angle mode of an entrenching tool is more effective than a traditional shovel for removing dirt from the bottom of a foxhole. They seem to have started (pre-filming) by clearing pine needles away from the whole area so they can cover up their digging with them when they’re done, using pitchforks. Apparently the actual Japanese term is 蛸壺, takotsubo, octopus pot; “spider hole” is from the US Civil War. Two people digging for the entire day were able to get the vertical 1.7-meter-deep shaft done, though I feel like they were being rather generous with its horizontal dimensions. To shore up the roof they’re using square-cut “2×4” and “4×4” hemlock (which I thought was pine) which they then sawed to length for “cribbing”, using very simple post-and-lintel construction, with the posts being the 2×4s. The mosquitoes chased them down the hole, and kept coming down the hole all night; a bug net for their heads would have been useful. The horizontal tunnel with its floor 1.7 meters deep is tall enough for the YouTuber to squat in; he knows how to squat even though he’s Canadian. Some fungal growth is visible on the timbers, which seems like it could be a problem. After four days of digging they were just about complete with their unsupported 1.7-meter vertical shaft and 2-meter horizontal shaft. They nailed 13 parallel 4×4s together into a square wooden manhole cover, then cut a recess into the dirt around the hole to support it. Square-cut 4×4s are really 4 inches, so this is 1.3 meters wide, and the hole maybe 0.9 meters wide. Then they cut a small “access hole” in the middle of the panel, three 4×4s wide (305mm) and a few times longer than that, dimensions he later wishes had been slightly larger. Once he’s holed up in his hole, he demonstrates using a flint and steel to strike sparks, and then demonstrates the use of a portable folding stove to heat up a can of beans. Later on they punched some holes in the manhole cover for ventilation. Full of military fantasies.
#Sanladerer Peopoly Magneto X printer #3D-printing #video It uses linear motors with closed-loop feedback (from a magnetic-strip DRO) for the X and Y axes, though still using leadscrews for Z (four of them, on steppers, moving the bed; the independent steppers allow it to do auto-bed-leveling using something like a load cell in the toolhead). It is large and heavy. The main controller is a Pi Zero2-1GB (which you can see booting Linux on the 7-inch micro-HDMI touchscreen), and then Klipper Adapter V1.0 I guess for the real-time electronics, and an ESP32 board that talks to the motor drivers over RS-485. The main motor control board is Bigtreetech Octopus Pro, which drives a couple of custom boards with big MOSFETs for the linear brushless motor drivers. He had to do some minor repairs with his lathe to get the bed leveling to complete. It did 64-point “mesh bed leveling” for bed height compensation, which found errors from -0.15mm to +0.11mm. The printhead has two fans blowing onto the workpiece through shrouds on opposite sides and another larger fan blowing air through the heatsink in the cold zone of the extruder. He crashed the extruder into the print bed, damaging the printer, wishing for “software endstops”. He had some problems with extruder flow control and underextrusion, while top solid surfaces were overextruded.
#Primitive-Technology natural-draft iron smelt #materials #bushcraft #bootstrapping #video with a 1.5-meter-tall 250mm-inside-diameter mud furnace built over the course of a week with four or eight tuyeres; only got a few grams of iron
DIY metal #3D-printing with a TIG welder bolted onto an Ender 3 by #Cranktown-City. He does successfully TIG-print a watertight vase after enough work. This worked much better than his previous MIG printing, but it’s still blobby, and he has layer shifts as if from missed motor steps. #video
#manufacturing an LCD #hardware #video #bootstrapping #toread
#electroplating with gold after #3D-printing #video #manufacturing #toread
salvaging old computer crap #hoarding #hardware #video #toread
“he lived 25 years in a train tunnel” #stealth-camping #video Walter Wengert, Jr., in the Freedom Tunnel in New York; he built himself a tiny but comfortably-decorated house high up in the wall of the tunnel, letting down a long ladder when necessary. Walter has poor taste in video player software, running Windows Media Player on his computer instead of something decent. He makes his money by rebuilding computers he finds out on the street and reselling them, selling used books, recycling aluminum cans (“going canning”), etc. This interview is maybe from 02008. He says that because his house is built into the superhighway, it’s under the authority of the Department of Transportation, not the railroad, so the railroad people haven’t been able to evict him because they have no authority over his house. He died in 02012.
#stealth-camping in a rather tiny, noisy traffic circle (“roundabout”) in Canada, but with bushes; too small for a tent or hammock. He enters camouflaged in a retroreflective safety vest with his gear backpack in a fluorescent orange garbage bag. Countersignaling FTW? After crawling into the bushes just before sunset (while apparently carrying a giant camera on a selfie stick), he hides the high-visibility stuff and lays out a gray ground sheet and bright turquoise sleeping bag, which he turns inside out to display the gray side instead. He gets a scare when one of the police cars and “community safety patrols” constantly passing parks nearby when he goes out to look around. He doesn’t wake up until after sunrise, despite a low of 6°, and he got lucky in that the sprinkler system didn’t go off. #video
#faircompanies building Quonset hut bunker villa #video #toread
sleeping in a war-style trench #stealth-camping #video #toread
homeless man moves into his pop-up shelter #stealth-camping #video. He built a tiny pentagonal house, sort of like a doghouse, out of discarded (insulated steel-skin plastic-foam sandwich panel!) garage-door segments, with a diesel generator, LED lights, a solar panel, etc. He adds a 20ℓ bucket toilet at some point. “Jim”, homeless six years, moved in, and was interviewed for the video. The YouTuber offers Jim to stay as long as he wants, but gets somewhat annoyed about “garbage everywhere”, and then Jim moved into a hotel.
Inside #Slab-City, The Lawless city in the Desert | Last Free Place In America #video #toread
#Slab-City, California: Last Free Place in America? (Extraordinary Place Documentary) | Real Stories #video #toread
I Survived a Night in America’s Last Lawless City (drug problems and daily sheriff arrests for them) #Slab-City #video #clickbait
alone overnight in a traditional Navajo hogan #video #toread
12 best #bushcraft projects #video: mug carved with a Dremel from a cow horn (which becomes flexible at 110° from the heat gun) with a bottom cut from wood sealed in with food-grade epoxy, degassed with a blowtorch (“Bushcraft”?); restoring a garage-sale axe by stripping and revarnishing the handle and then riveting together leather into a sheath, sealed with boiled linseed oil; forging a flint striker from a car leaf spring (so it can be quench-hardened) cut with an angle grinder; etc. #toread
police station #stealth-camping in hammock #video #toread
hammock #stealth-camping under a bridge #video #toread
U-Haul #stealth-camping in the cold #video #toread
McDonald’s Drive-Thru #stealth-camping #video #toread
2 nights extreme cold #stealth-camping in the city #video #toread
“inside [Carlos’s] amazing home in the [Freedom Tunnel] beneath New York”. He had heat, electricity, computers, refrigerators, and a microwave, and lives on food discarded by supermarkets; he’s converted a former sewer into a comfortable, clean house, maintaining cleanliness with a no-shoes policy. He had to bring in water in jugs. “The [homeless] shelter is a very, very wicked place. (...) Drugs, fighting...” Later the authorities kicked him, and everyone else, out. #stealth-camping #video #underground
“meet the mole people living beneath the Las Vegas Strip” #stealth-camping #video #toread
“10 years after he lived in a train tunnel” #stealth-camping #video #toread
“I live 25 meters above the ground, safe place from wild animals and bears” apparently in a lashed-construction wattle-and-daub sphere, painted white over the earth tones, hoisted up between trees with ropes and a chain hoist. Armed with a backpack full of tools and a comically wide-bladed axe, Ramiz digs a shallow well in a dry creek bed, cuts saplings with a machete for his framework, and measures out a three-meter circle on the ground with a machete-sharpened stake (hammered with a rock) and plastic twine. His initial lashings use baling wire twisted tight with fencing pliers. More stakes bend the lashed saplings into the circle; more lashings add spokes. A smaller circle of stakes is used to bend four smaller circles of saplings with lashed spokes. A thrown river rock pulls twine over a tree branch some 15 meters up; the twine draws up rope, and the rope draws up Ramiz and the chain hoist, which he installs in the tree. To support the sapling armature during further construction, sapling guide poles constrain the spoked circles to remain vertically aligned, supported on the poles with wire. Further saplings bent around the outside form the convex spherical shape, held in place with more baling wire twisted and cut with the fencing pliers. The guide poles now being unnecessary, they are removed, and the rope is removed from the tree to distribute the hanging load over many points of the sphere; the chain hoist hook connects to it, and suspension is achieved. Heavier saplings across the lower large circle serve as floor joists, lashed in place with wire, and another layer of saplings at right angles to the joists serve as floorboards, also wired in place. Windows and a door are sawn. Apparently he forgot his cigarette lighter, matches, and steel wool when he packed the machete, saw, fencing pliers, shovel, comically large axe, and chain hoist, because he has to start his fire with flint and steel. He boils the nasty muddy water from his well in a steel teakettle over the fire, suspending it from a sapling over the fire with baling wire. The next day (though several days have evidently passed, enough for leaves to dry from the rain) he digs mud from a bank, brings it back in a gunny sack, and adds more of the nasty water to make a plastering mud, which he reinforces unwisely with fresh grass that will shrink rather than dry straw, making adobe, with which he plasters the interior of his sapling frame from the inside, up to knee height. Removing the spokes from the upper large spoked circle, he adds two new joist-sized saplings to make a raised bed at knee height on one side of the sphere. Then he plasters the outside with a fresh batch of adobe up to knee height, then both inside and out up to chest height. He gathers chestnuts (?) and eats them raw, and finds a coral fungus he had carefully placed on the bank previously, which he roasts on skewers over a campfire. Rain comes again without a roof; he makes do with a disposable raincoat as he makes more adobe. Eight more saplings lashed up with baling wire form a crude ladder, permitting the plastering of the roof with adobe from outside; he later daubs adobe on the inside as well, and also plasters the floor with it, a choice which seems suboptimal to me. Vinyl sheeting in the window and a door made of more lashed-together saplings complete the sphere, which at this point has somehow come to rest off the ground on a new sapling circle wired to a circle of stakes, perhaps having permitted the plastering of the bottom. Another crude ladder affords access to the door, which is by now a meter and a half off the ground. Inside he covers the adobe plaster with shiny green cloth he apparently brought in his backpack. Many more short sapling sections, stripped of their bark by the machete, rest on the bed joists to form the bed itself, lashed down to the joists, but this time with the plastic twine rather than wire. Evidently weeks or months have passed, and dry leaves impede his access to his adobe bank, but he digs more mud to make a fireplace on top of the green cloth, which he has evidently also used to cover the floor, stapling it in place all along various the saplings with a staple gun not shown. Twigs bent into arches support the mud of the oven, and somehow or other he also formed it into a chimney; perhaps a metal pipe is hidden under the clay chimney. A metal lid over a round hole in the top of the oven serves as a stove burner. The chimney is routed up the wall and through a round chimney hole, like for a stovepipe. He gathers black berries in a tin can and smushes them up, then uses fern leaves to paint the adobe with them; somehow they color the orange adobe white, or a light lavender, so perhaps some slaked lime got added along the way. By hoisting the house up higher with the chain hoist, he can even paint its bottom. Charcoal serves as black pigment to paint his name and YouTube channel name on the outer wall. By dangling his legs out the door he can reach the hoist chain to lift the house far off the ground. Off in the woods one day he spots a gorilla; in a panic, he lifts the house back off the ground. At the end of the video he finally attempts to use the comedy axe but doesn’t know how. #stealth-camping #video
“what they don’t tell you about life in India” hour-long #documentary #video from 02012. First, the life of a young goldsmith or gold sweeper from Agra who has moved to Kolkata to seek his fortune, sweeping trace amounts of gold off the street where the other goldsmiths wash, paying 200 rupees per person in rent. Then, the life of some fenugreek farmers in squatters’ shacks on a municipal beach in Mumbai, and their children going to school, and their underground pub which serves only rum, until the municipal government bulldozes the settlement, which the residents rebuild the same day. There’s a sluicing plant on the banks of the Ganges which refines the sludge the gold sweepers retrieve from the drains. One of the goldsmiths considers moving to a rented room nearby which costs 2000 rupees a month, but it’s too expensive, until he finds a sludge buyer who offers a better price, and he haggles the room down to 1600 rupees a month. Very informative about #poverty.
“black powder from charcoal and waste oil” (nasty used cooking oil from Abigail’s Jeep Joint food truck, and then used engine oil). #materials #video They’re using the oil to fire a 200ℓ oil drum with a charcoal retort in the middle. I like the blower design: an axial blower (maybe a microwave oven fan?) stuffed into a two-meter-long galvanized 100mm stovepipe to keep it two meters away from the fire, with an elbow at the end to stop thermal radiation. The barrel design was not optimal for burning the oil, but an old blanket as a wick helped. The air inlet must have been further off the bottom than it looked for the oil to pool in the bottom of the drum instead of running out the air inlet. Despite the #clickbait title, they also used potassium nitrate and sulfur.
“the original warrior energy bar” #cooking #video a Georgian preserved sweet called “churchkhela” (ჩურჩხელა) made by boiling down grape juice, adding flour, and then dipping a cord threaded through nutmeats in it, somewhat like a dip candle, then dried in the sun.
#3D-printed metal vs. CNC #manufacturing #video #toread
“easiest free street-lithium yet” #bigclive #hardware #video about disposable cylindrical “blu” vapes with 16300-sized #lithium-ion cells of 520mAh, 13g, 1.92Wh, that drop right out when you unscrew the endcap, with coaxial contacts on one end. It looks a lot like an electrolytic cap.
fake billboard #stealth-camping #video #toread
#GreatScott cheapest Arduino alternative 20¢ #video #hardware He’s recommending the Holtek HT66F002, apparently unaware of the Padauk chips, even though he posted this only three weeks ago. It’s an 8-SOP with 1kB, an 8MHz internal oscillator, 6 GPIOs, a 12-bit ADC, and a 10-bit timer, but no I²C. He needs I²C, PWM output, GPIOs, an ADC, and low-power sleep. He ended up installing some proprietary Holtek IDE and buying a Holtek programmer, ugh, and then spending a couple of days debugging Blink before figuring out that he needed to disable the watchdog. It slept at 11μA, considerably better than the datasheet number. The instruction set is unfamiliar: one accumulator, conditional skip instructions, Harvard architecture, no multiplies. They don’t document the instruction encoding. He upgraded to the 32¢ HT66F0176 to get I²C instead of trying to bitbang it, then discovered that Holtek microcontrollers only support I²C in slave mode, so he’s going to try the 50¢ ATtiny402. Some Holtek μCs are under 10¢. (Oh, and apparently JLCPCB will be offering multicolored PCB silkscreen now.)
“ultimate” #stealth-camping van #video "Stories from a Van". Looks like a dream come true. It looks like any old ordinary white Nissan minivan, with a gray curtain behind the bucket seats, no side windows, and a tinted back window, but inside it has a cassette toilet, a bed, a desk with seating, a sink, clothes on hangers, a deep-cycle battery powered by roof solar panels, a graywater tank, and a shower (though it is not tall enough to stand up in). He says he lived in it in San Francisco for a year and could park anywhere and nobody ever bothered him. Rooftop vent, indoor 12V LED lighting, Igloo cooler, 1000-watt inverter, dual removable freshwater tanks, and the graywater tank slowly leaks onto the pavement under the van. Wind deflectors on the front windows allow him to crack the front windows to let in air without them looking open or letting in rain. He’s using ice in the Igloo cooler for food storage, says it lasts a week and a half. Probably would be useful to have active refrigeration. He says the “automatic charging relay” that charges the deep-cycle battery from the van’s alternator when it’s running hasn’t been needed because the two solar panels have been more than enough. He has a butane stove to use outside the van, and also a sort of polyethylene foam foil box for low-temperature low-wattage cooking inside of, astonishingly, Tupperware. He says he’s living in Santa Cruz now.
20 #stealth-camping tips #toread