Notes concerning “Electronics”

• A filesystem design sketch modeled on Lucene 2007 to 2009 (43 minutes)
• bytecode interpreters for tiny computers 2007-09 (61 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 (41 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)
• The Tinkerer’s Tricorder 2013-05-17 (updated 2014-04-24) (27 minutes)
• Trellis-coded buttons to run a whole keyboard off two microcontroller pins 2013-05-17 (updated 2019-06-13) (30 minutes)
• Building a resilient network out of litter 2014-04-24 (4 minutes)
• lattices, powersets, bitstrings, and efficient OLAP 2014-04-24 (17 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 (16 minutes)
• Making a mechanical state machine via sheet cutting 2014-04-24 (updated 2015-09-03) (7 minutes)
• Keyboard-powered computers 2014-10-25 (updated 2018-10-28) (26 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)
• Bitstream dsp 2015-09-03 (updated 2019-06-23) (3 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 2019-07-23) (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 (5 minutes)
• Electroluminescent matrix 2016-07-27 (2 minutes)
• Matrix memory 2016-07-27 (1 minute)
• Arduino radio 2016-07-30 (4 minutes)
• Coinductive keyboard 2016-07-30 (4 minutes)
• Solar-cell Geiger counters 2016-07-30 (1 minute)
• 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) (23 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 (5 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) (7 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 2019-09-29) (22 minutes)
• Finite function circuits 2017-02-16 (updated 2019-05-17) (29 minutes)
• Non-inverting logic 2017-02-18 (updated 2019-07-20) (8 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)
• Can you bitbang USB with an ATMega’s RC oscillator? 2017-04-04 (1 minute)
• 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 rebraining 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)
• Adding GPIO lines over USB with a Saleae logic analyzer 2017-05-10 (1 minute)
• VCR oscilloscope 2017-05-10 (updated 2017-06-20) (2 minutes)
• Ideas to explore 2017-05-29 (updated 2019-09-15) (3 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 (updated 2019-07-10) (21 minutes)
• Bench trash power supply 2018-04-27 (9 minutes)
• Cassette tape capacity 2018-04-27 (1 minute)
• Earring computer 2018-04-27 (1 minute)
• 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 2018-11-12) (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) (9 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) (16 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 (22 minutes)
• Matrix exponentiation linear circuits 2018-12-18 (4 minutes)
• Hardware multiplication with square tables 2019-02-08 (updated 2019-07-09) (4 minutes)
• Groping toward a high-efficiency speaker driver 2019-04-02 (15 minutes)
• Paper/foil relays 2019-04-02 (updated 2019-10-23) (13 minutes)
• Macroscopic capacitive DLP 2019-04-08 (1 minute)
• 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 (21 minutes)
• Induction kiln 2019-06-02 (19 minutes)
• How to get 6 volts out of a 7805, and why you shouldn’t 2019-06-08 (updated 2019-06-10) (8 minutes)
• Smooth hysteresis 2019-06-11 (13 minutes)
• Measuring the moisture content of coffee and other things with dielectric spectroscopy 2019-07-16 (updated 2019-07-17) (28 minutes)
• Printed circuits on fired-clay ceramic 2019-08-13 (11 minutes)
• the oversold-as-low-power Renesas RL78 microcontroller line 2019-08-27 (10 minutes)
• Can you bitbang wireless communication between AVRs? How about AM-radio energy harvesting? 2019-08-27 (updated 2019-08-28) (37 minutes)
• Photodiode camera 2019-09-04 (16 minutes)
• Capacitive droppers and transformerless power supplies 2019-09-18 (11 minutes)
• Audio tablet 2019-09-28 (7 minutes)
• Methods of pumping ice-vest coolant silently 2019-09-28 (12 minutes)
• Bistable magnetic electromechanical display 2019-10-24 (16 minutes)
• Examination of a shitty USB car charger 2019-10-24 (13 minutes)
• Comb filtering PWM 2019-10-28 (4 minutes)
• Audio logic analyzer 2019-11-12 (3 minutes)
• Nonconductive relays 2019-11-12 (3 minutes)
• Backwards cockcroft walton 2019-12-01 (2 minutes)
• High temperature semiconductors 2019-12-01 (2 minutes)
• Transmitting low-power TV signals around your house via RF modulation with an SDR 2019-12-01 (6 minutes)
• Really simple lab power supply 2019-12-10 (7 minutes)