Notes concerning “Electronics”
A filesystem design sketch modeled on Lucene
2007 to 2009 (44 minutes)
bytecode interpreters for tiny computers
2007-09 (64 minutes)
Illuminating yourself with 10 kilolux of LEDs to combat seasonal affective disorder
2013-05-17 (5 minutes)
Charge transfer servo
2013-05-17 (2 minutes)
Cheap shit ultrawideband
2013-05-17 (10 minutes)
Harvesting energy with a clamp-on transformer
2013-05-17 (7 minutes)
Ghettobotics: making robots out of trash
2013-05-17 (42 minutes)
You’re pretty much fucked if you want to build an oscilloscope on the AVR’s ADC
2013-05-17 (3 minutes)
Steampunk spintronics: magnetoresistive relay logic?
2013-05-17 (15 minutes)
Quadtree compression of terminal video RAM to do a megapixel windowing system in 6 KiB
2013-05-17 (9 minutes)
Saturation detector
2013-05-17 (3 minutes)
A resistive-capacitive trackpad made from garbage and three ADC microcontroller pins
2013-05-17 (updated 2013-05-20) (17 minutes)
Trellis-coded buttons to run a whole keyboard off two microcontroller pins
2013-05-17 (updated 2013-05-20) (19 minutes)
The Tinkerer’s Tricorder
2013-05-17 (updated 2014-04-24) (27 minutes)
lattices, powersets, bitstrings, and efficient OLAP
2014-04-24 (18 minutes)
Precisely how is 3 “optimal” for one-hot state machines, sparse FIR kernels, etc.?
2014-04-24 (8 minutes)
An extremely simple electromechanical state machine
2014-04-24 (17 minutes)
Making a mechanical state machine via sheet cutting
2014-04-24 (updated 2015-09-03) (8 minutes)
Keyboard-powered computers
2014-10-25 (updated 2018-10-28) (27 minutes)
Simplified computing, down to the level of mining raw materials
2015-09-03 (22 minutes)
A hand-powered computer?
2015-09-03 (updated 2017-07-19) (11 minutes)
Virtual instruments
2015-11-09 (3 minutes)
Making a logic gate of a single MOSFET
2016-06-28 (5 minutes)
Transmission line computer
2016-07-11 (updated 2016-07-13) (7 minutes)
How can we build an efficient microcontroller-based amplifier?
2016-07-13 (5 minutes)
Jellybean ICs 2016
2016-07-14 (updated 2019-05-05) (17 minutes)
How would you maximize the energy density of a capacitor?
2016-07-27 (6 minutes)
Electroluminescent matrix
2016-07-27 (2 minutes)
Arduino radio
2016-07-30 (4 minutes)
Coinductive keyboard
2016-07-30 (4 minutes)
Transmission line diode computation
2016-07-30 (3 minutes)
Argentine oscilloscope pricing 2016
2016-08-16 (4 minutes)
Digital logic with lasers, induced X-ray emission, and neutron-induced fission, for femtosecond switching times?
2016-09-06 (3 minutes)
Low-power microcontrollers for a low-power computer
2016-09-06 (updated 2018-10-28) (18 minutes)
Circuit notation
2016-09-08 (updated 2017-04-18) (7 minutes)
Graph construction
2016-09-08 (updated 2017-07-19) (25 minutes)
Further notes on algebras for dark silicon
2016-09-17 (updated 2017-04-18) (23 minutes)
Solar-powered portable computers
2016-09-17 (updated 2018-10-28) (15 minutes)
License-free femtowatt UHF radio transceiver ICs under a μJ per bit
2016-09-19 (4 minutes)
Laser ablation of zinc or pewter for printed circuit boards
2016-09-19 (4 minutes)
Hybrid RAM
2016-09-24 (5 minutes)
Marking metal surfaces with arcs
2016-10-06 (4 minutes)
Spark particulate sieve
2016-10-06 (updated 2016-10-11) (6 minutes)
Current hardware trends tend toward raytracing
2016-10-07 (4 minutes)
Nonlinear differential amplification
2016-12-14 (2 minutes)
My attempt to learn about jellybean electronic components
2017-02-08 (updated 2018-08-16) (19 minutes)
Finite function circuits
2017-02-16 (updated 2019-05-17) (34 minutes)
Non-inverting logic
2017-02-18 (9 minutes)
A 7-segment-display font with 68 glyphs
2017-02-21 (4 minutes)
Lab power supply
2017-02-21 (updated 2018-06-18) (17 minutes)
Vibratory powder delivery
2017-02-25 (2 minutes)
Augmenting a slow precise ADC with a sloppy fast high-pass filtered parallel ADC
2017-03-20 (2 minutes)
Loading new firmware on an AVR
2017-03-31 (3 minutes)
Could you do DDS of comprehensible radio signals with an Arduino?
2017-03-31 (4 minutes)
The Magic Kazoo: a synthesizer you stick in your mouth
2017-04-04 (updated 2019-05-12) (6 minutes)
Disk oscilloscope
2017-04-10 (updated 2017-06-20) (3 minutes)
TV oscilloscope
2017-04-10 (updated 2017-06-20) (4 minutes)
Reflections on rebraiing calculators with this RPN calculator code I just wrote
2017-04-11 (4 minutes)
Laser printer oscilloscope
2017-04-18 (updated 2017-06-20) (2 minutes)
Minimum hardware and software to get a flexible notetaking device running
2017-04-28 (4 minutes)
Can a simple nonlinear VCO enable super cheap oscilloscopes?
2017-05-04 (updated 2017-05-10) (5 minutes)
Dumb vocoder
2017-05-10 (2 minutes)
VCR oscilloscope
2017-05-10 (updated 2017-06-20) (2 minutes)
Ideas to explore
2017-05-29 (4 minutes)
CCD oscilloscope
2017-06-20 (updated 2017-07-04) (7 minutes)
A stack of stacks for simple modular electronics
2017-06-27 (5 minutes)
Constant current switching capacitor charging
2017-07-19 (1 minute)
An RPN CPU instruction set doubling as user interface
2017-07-19 (9 minutes)
Bench trash power supply
2018-04-27 (9 minutes)
Urban autarkic network
2018-04-27 (1 minute)
Exploration of using RF current sources instead of ELF voltage sources for mains power
2018-04-30 (updated 2018-07-05) (29 minutes)
Arduino curve tracer
2018-06-17 (10 minutes)
Diode logic
2018-06-17 (16 minutes)
Resistor assortment
2018-06-17 (4 minutes)
Snap logic
2018-06-17 (3 minutes)
Word stream architecture
2018-06-17 (13 minutes)
Transistors vs. Microcontrollers
2018-06-17 (updated 2018-07-05) (8 minutes)
Turning off the power supply for every sample to reduce noise
2018-06-18 (2 minutes)
Lithium battery welder
2018-06-21 (updated 2019-01-22) (2 minutes)
The TWI and I²C buses and better alternatives like CAN and RS-485
2018-06-28 (updated 2018-07-05) (24 minutes)
Hacking a buck converter into a class-D amplifier?
2018-06-30 (4 minutes)
The Adafruit Feather
2018-06-30 (1 minute)
Notes on the STM32 microcontroller family
2018-06-30 (updated 2018-10-28) (42 minutes)
Electric hammer
2018-07-02 (updated 2018-07-05) (14 minutes)
Capacitors: some notes on tradeoffs
2018-07-05 (5 minutes)
Can you turbocharge the STM32 ADC to build an oscilloscope?
2018-07-14 (5 minutes)
Microlens vibrating lightfield
2018-07-14 (updated 2018-07-15) (11 minutes)
Comparable counters
2018-08-16 (1 minute)
Notes on circuitry for the Nutra seed activator
2018-08-16 (20 minutes)
Gradient pixels
2018-08-16 (updated 2018-10-28) (10 minutes)
Text editor design for e-ink displays
2018-10-28 (23 minutes)
Time domain analog chaos
2018-10-28 (4 minutes)
The details of the GPU in this laptop
2018-10-29 (2 minutes)
Performance properties of sets of bitwise operations
2018-11-06 (updated 2018-11-07) (22 minutes)
Atmospheric pressure harvesting phoenix egg
2018-11-23 (14 minutes)
Parallel register file
2018-11-27 (2 minutes)
The Stretch book is truly alien
2018-11-27 (6 minutes)
What can you build out of 256-byte ROMs?
2018-12-02 (1 minute)
Arduino safety
2018-12-10 (4 minutes)
A two-operand calculator supporting programming by demonstration
2018-12-11 (25 minutes)
Matrix exponentiation linear circuits
2018-12-18 (4 minutes)
Hardware multiplication with square tables
2019-02-08 (updated 2019-02-24) (4 minutes)
Groping toward a high-efficiency speaker driver
2019-04-02 (15 minutes)
Paper foil relays
2019-04-02 (updated 2019-04-24) (11 minutes)
Hall-effect Wheatstone bridges for impractical steampunk electronic logic gates
2019-04-24 (2 minutes)
Measuring submicron displacements by pitch bending a slide guitar
2019-05-05 (18 minutes)
Free space optical coding gain
2019-05-08 (updated 2019-05-09) (4 minutes)
A phase-change soldering iron
2019-05-08 (updated 2019-05-09) (14 minutes)
Inductor thermocouple sensing
2019-06-01 (18 minutes)