#video of reusing #hoarding old earphones for #electronics #hardware. There’s a continuity-tester Android app, haha! Nice #jugaad with a 2.2kΩ resistor desoldered from a power-supply board, hot glue, and heat-shrink tape. And apparently there’s also a TV remote control Android app called ZaZaRemote by Tiqiaa if you plug infrared LEDs into your microphone port, which the app knows under the name “Smart-ZaZa” or “Audio-IR device”. #bootstrapping
#video #toread by #Makers-Muse on #3D-printing without looking 3-D printed
#video #toread on alternatives to “fuzzy skin” for #3D-printing
#video #toread on DIY metal #3D-printing with “DED”
#video #toread on DIY metal #3D-printing
#video purportedly on #flying microscopic robots with invisible batteries (MIT Micro Bots). Video, from "AI Uncovered", is just a compendium of worthless irrelevant stock footage. Plonk.
#video #toread on DIY (?) metal #3D-printing
#video on #bootstrapping a DIY #CNC #machining mill under US$100 by #Hyperspace-Pirate, somehow including multiple-start leadscrews, brass nuts for them, etc. He’s #3D-printing the brackets to hold the aluminum together. Basically a bunch of aluminum extrusions (largely 8020 style held onto the brackets with T-nuts) to make a bedslinger gantry, which he can now mill aluminum on. The slinging is all happening with leadscrews instead of timing belts. He’s using NEMA steppers with shaft couplers, lots of Allen screws, precision-ground rods with linear ball bearings running on them, etc. Not super practical for poor people! The simple rectangular design maximizes compliance, which is counterproductive. And it’s going to lose steps and ruin parts from the end effector side loading. “I’m using a 24V 20A power supply which is way beyond what the machine needs but it’s what I had sitting around.” He’s running GRBL on an Arduino Uno, with A4988 breakout boards on an Arduino shield on top of it to drive the steppers. For whatever reason he decided to run the spindle off a 555 PWM driving an IRLZ34N MOSFET. He’s using UGS (Universal Gcode Platform) on his laptop to send the G-code to GRBL. He engraves and routes some wood with a ⅛” endmill. Rigidity problems initially prevent cutting aluminum. Budget: US$30 for spindle motor and collet (1.5A), US$24 for the build plate (¼” aluminum), US$11 linear bearings, US$10 extra endmills, total US$75.
#video #toread on “digital glasses” (apparently a head-mounted display called Even Realities G1)
#Arduino setup using #V-USB to #bitbang #USB with keyboard and mouse on the Arduino Uno R3
#ESP32 #microcontrollers have not very good ADCs, not good enough for music with DNL of ±7 counts and lots of noise, despite 12 bits of resolution at 200ksps
Shane Sonderman swatted Mark “Sparky” Herring, who died after the cops ordered him to crawl under a fence #crime