41J Blog

My contribution to the increasing entropy, and eventual heat death of the universe

Archive for the ‘Uncategorized’ Category.

PX-045A Printhead

July 29, 2023, 6:25 am

DC Values (prior to printing)

1

2

3 Using as GND reference

4 2.59V DC

5 3.3V DC

6 3.3V DC

7 0V DC

8 0V DC

9 3.3V DC

10 0V

11 NC

12 0V

13 0V

14 0V

15 0V

16 0V

17 0V

18 0V

19

20

21

During print

1

2 0V

3 Using as GND reference

4 Goes to 3.3v sometimes during print for long (100 to 200ms+ periods)

5 3.3V DC

6 3.3V DC

7 0V DC

8 500ns/3.3v ~every 20us

9 3.3V DC

10 500ns/3.3v

11 NC

12 0V (some ripple)

13 ~84ns/3.3v. Looks like data clk.

14 0V

15 84ns/3.3v Looks like data.

16 0V

17 84ns/3.3v Looks like data.

18 0V

19 Looks like 43v (>30v)

20

21 0V

Pin 4 during print:

1,20 Connected

2,3,7,11,12,14,16,18,21 Connected

5,9 Connected (likely 3.3)

Pin 4 seems up be pulled up to 3.3v on controller. (4.7K pullup)

Category: Uncategorized  |  Comment

Random Notes 3

July 29, 2023, 6:24 am

Maxon DC Motor 139885

https://uk.rs-online.com/web/p/gearboxes/4450184/

https://www.ebay.co.uk/itm/Maxon-139885-Mini-Coreless-Gear-Servo-Motor-DC-12V-Strong-Magnetic-for-Robot-/282288860535?clk_rvr_id=1509908084864&rmvSB=true

Combination of Maxon DC Motor :118426 & Maxon Planetary Gear : 110315 (67:1)

SIZE : DIAMETER BODY : 13 MM
           DIAMETER SHAFT : 3 MM
           TOTAL LENGTH : 55 MM
1.2 Volt = 18 Rpm , 1.5 Volt = 24 Rpm , 1.8 Volt = 29 Rpm , 2.4 Volt = 40 Rpm, 3.0Volt = 52 Rpm , .3.6 Volt = 64 Rpm,
4.8 Volt = 88Rpm, 6.0 Volt = 113 Rpm, 7.2 Volt = 137 Rpm , 10.0 Volt = 193 Rpm , 12.0 Volt = 233 Rpm

Category: Uncategorized  |  Comment

Random Notes 2

July 29, 2023, 6:23 am

Hiseq 2000 TDI

Serial number from one module: C10000-515, 661675.

Latest DCAM-API

aslver.exe dump from my cameras:

1: AS-PHX-D48CL-PE1
Grabber HW Version    9.10.00
Grabber SW Version    5.58.24
Library FW Version    9.10.00
Grabber Connection    PCIe x1
Camera Connected    Unknown
Camera Name    C10000-515
Camera S/N    S/N: 661694
Camera Version    INF 2.01-F20-R02

1x PCIe card appears to work. 4x PCIe doesn’t show up on aslver.exe as yet.

Trigger was plugged into SMA port on board, driven by function generator 5V input.

Cameralink cable plugged into top port (furthest from motherboard) on the PCIe cameralink acquisition board.

HP C6602

---

http://nicholasclewis.com/projects/inkshield/

LinearCCDs

---

Click to access SONY-ILX511A.pdf

http://www.advancedmems.com/pdf/AMEMS_LineSensorArraySummary_v1.pdf

S11639 CMOS made by Hamamatsu

ILX511:

LSH6008-CA10A

Same as in Epson printers?

Stuff from, https://twitter.com/steubens7/status/1179848585636126720

nope, this little shoulder is the black level / zero value, iirc there was another 3 volts or so before saturation.

top trace is analog output, second trace is the trigger, bottom trace is the clock that cycles samples out after trigger, the short pulses on the trigger line were sample every 32 elements in the scan head or something:
https://gist.github.com/ohsix/4f518a2080dc913f880273fc80e04f52

	#include <Arduino.h>
	#include <ports.h>
	#include <base.h>
	#include <DirectIO.h>
	#include <Adafruit_NeoPixel.h>
	#include <TimerOne.h>
	#define CLKPIN TIMER1_A_PIN
	#define TRGPIN 4
	#define DEBUGPIN 6
	#define FIRSTFIELD 7
	#ifndef cbi
	#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
	#endif
	#ifndef sbi
	#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
	#endif
	Output<TRGPIN> trg;
	Output<CLKPIN> clk;
	Output<6> dbg;
	Output<FIRSTFIELD> ff;
	#define NUMPIXELS 8
	#define NEO_PIN 8
	Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, NEO_PIN, NEO_RGB + NEO_KHZ800);
	const uint8_t PROGMEM gamma8[] = {
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1,
	1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2,
	2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5,
	5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10,
	10, 10, 11, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16,
	17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 24, 24, 25,
	25, 26, 27, 27, 28, 29, 29, 30, 31, 32, 32, 33, 34, 35, 35, 36,
	37, 38, 39, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 50,
	51, 52, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 66, 67, 68,
	69, 70, 72, 73, 74, 75, 77, 78, 79, 81, 82, 83, 85, 86, 87, 89,
	90, 92, 93, 95, 96, 98, 99,101,102,104,105,107,109,110,112,114,
	115,117,119,120,122,124,126,127,129,131,133,135,137,138,140,142,
	144,146,148,150,152,154,156,158,160,162,164,167,169,171,173,175,
	177,180,182,184,186,189,191,193,196,198,200,203,205,208,210,213,
	215,218,220,223,225,228,231,233,236,239,241,244,247,249,252,255 };
	void setup() {
	analogReference(EXTERNAL);
	pinMode(CLKPIN, OUTPUT);
	//pinMode(DEBUGPIN, OUTPUT);
	Timer1.initialize(1); // ~1mhz
	Timer1.pwm(CLKPIN, 512); // 50% duty cycle
	Timer1.stop();
	pinMode(TRGPIN, OUTPUT);
	pinMode(A0, INPUT);
	pinMode(ledToPin(0), OUTPUT);
	pinMode(ledToPin(1), OUTPUT);
	pinMode(ledToPin(2), OUTPUT);
	Serial.begin(115200);
	cbi(ADCSRA, ADPS0);
	cbi(ADCSRA, ADPS1);
	cbi(ADCSRA, ADPS2);
	sbi(ADCSRA, ADPS1);
	// Serial.print("prescaler = ");
	// Serial.println(ADCSRA & 0xE0);
	pixels.begin();
	}
	int avgRead(int port, int samples)
	{
	int i;
	long reading = 0;
	for(i = 0; i < samples; i++)
	{
	reading += analogRead(port);
	}
	reading /= samples;
	return reading;
	}
	void clockCycle(int pin, int count)
	{
	while(count–)
	{
	digitalWrite(pin, HIGH);
	digitalWrite(pin, LOW);
	}
	}
	int ledToPin(int color)
	{
	switch(color)
	{
	case 0: // red
	return 2;
	break;
	case 1: // green
	return 3;
	break;
	case 2: // blue
	return 5;
	break;
	}
	}
	void ledOn(int color)
	{
	digitalWrite(ledToPin(color), LOW);
	}
	void ledOff(int color)
	{
	digitalWrite(ledToPin(color), HIGH);
	}
	void ledsOn()
	{
	for(int i = 0; i <= 2; i++)
	ledOn(i);
	}
	void ledsOff()
	{
	for(int i = 0; i <= 2; i++)
	ledOff(i);
	}
	// returns n samples from start of readback to end of readback
	void readLine(byte* output, int samples)
	{
	int zeroLevel;
	int blackLevel;
	int clocks;
	int i;
	int samplePos = 2593 / samples;
	int currSample = 0;
	shiftOut(TRGPIN, CLKPIN, MSBFIRST, 0xF0); // trigger pulse and slow clock
	// lock step through front porch with slow clock in order to capture reference levels without unpredictable jitter
	clockCycle(CLKPIN, 4);
	// sample black level
	for(i=0; i < 3; i++)
	{
	clocks=5; while(clocks–)
	{
	clk=1;
	clk=0;
	}
	blackLevel += avgRead(A0, 3);
	}
	blackLevel /= 3;
	// Serial.print("blackLevel = ");
	// Serial.println(blackLevel);
	// 65 more clock cycles until analog goodies
	clocks = 65; while(clocks–)
	{
	clk=1;
	clk=0;
	}
	#define ANALOG_CLOCKS (12 * 216 + 1)
	int stepSpacing = ANALOG_CLOCKS / samples;
	int nextSample = 0;
	// go through analog bins
	for(i = 0; i < 12 * 216 + 1; i++)
	{
	clk = 1;
	if(nextSample– == 0)
	{
	dbg=1;
	nextSample = stepSpacing;
	// output[currSample++] = map(avgRead(A0, 5), blackLevel, 1024, 0, 255);
	output[currSample++] = map(analogRead(A0), blackLevel, 1024, 0, 255);
	dbg=0;
	}
	clk = 0;
	}
	#if 0
	for(i = 0; i < 2593; i++)
	{
	clk =1;
	clk =0;
	}
	#endif
	}
	void loop() {
	int led = 0;
	byte samples[64];
	byte redSamples[NUMPIXELS];
	byte greenSamples[NUMPIXELS];
	byte blueSamples[NUMPIXELS];
	int i;
	ff=1;
	ff=0;
	#if 1
	ledOn(0);
	readLine(redSamples, NUMPIXELS);
	ledsOff();
	ledOn(1);
	readLine(greenSamples, NUMPIXELS);
	ledsOff();
	ledOn(2);
	readLine(blueSamples, NUMPIXELS);
	ledsOff();
	#endif
	#if 0
	for(led = 0; led < 0; led++){
	ledOn(led);
	readLine(samples, 4);
	ledOff(led);
	}
	ledsOff();
	#endif
	for(i = 0; i < NUMPIXELS; i++)
	{
	#if 0
	Serial.print("sample[");
	Serial.print(i);
	Serial.println("] = ");
	Serial.print("red ");
	Serial.println(redSamples[i]);
	Serial.print("green ");
	Serial.println(greenSamples[i]);
	Serial.print("blue ");
	Serial.println(blueSamples[i]);
	#endif
	pixels.setPixelColor(i, pixels.Color(pgm_read_byte(&gamma8[greenSamples[i]]), pgm_read_byte(&gamma8[redSamples[i]]), pgm_read_byte(&gamma8[blueSamples[i]])));
	// pixels.setPixelColor(i, pixels.Color(0, 0, 0));
	// pixels.setPixelColor(i, pixels.Color(redSamples[i], greenSamples[i], blueSamples[i]));
	// pixels.setPixelColor(i, pixels.Color(pgm_read_byte(&gamma8[redSamples[i]]), pgm_read_byte(&gamma8[greenSamples[i]]), pgm_read_byte(&gamma8[blueSamples[i]])));
	// pixels.setPixelColor(i, pixels.Color(pgm_read_byte(&gamma8[redSamples[i]]), pgm_read_byte(&gamma8[redSamples[i]]), pgm_read_byte(&gamma8[redSamples[i]])));
	pixels.show(); // This sends the updated pixel color to the hardware.
	}
	// delay(100);
	//delayMicroseconds(100);
	}
	void old_loop() {
	int bin;
	int i;
	int samples[12];
	int clocks;
	int zeroLevel;
	int blackLevel;
	static int led=0;
	//shiftOut(TRGPIN, CLKPIN, MSBFIRST, 0);
	dbg=1;
	zeroLevel = avgRead(A0, 5);
	// zeroLevel = analogRead(A0);
	dbg=0;
	dbg=1;
	shiftOut(TRGPIN, CLKPIN, MSBFIRST, 0xF0); // trigger pulse and slow clock
	dbg=0;
	// lock step through front porch with slow clock in order to capture reference levels without unpredictable jitter
	dbg=1;
	clockCycle(CLKPIN, 4);
	dbg=0;
	dbg=1;
	for(i=0; i < 3; i++)
	{
	clocks=5; while(clocks–)
	{
	clk=1;
	clk=0;
	}
	blackLevel += avgRead(A0, 3);
	}
	blackLevel /= 4;
	// Serial.print("blackLevel = ");
	// Serial.println(blackLevel);
	dbg=0;
	if(led == 0){
	ff = 1;
	ff = 0;
	}
	ledOn(led);
	//ledsOn();
	dbg=1;
	clocks = 40; while(clocks–)
	{
	clk=1;
	clk=0;
	}
	dbg=0;
	for(i = 0; i < 350*8; i++)
	{
	clk =1;
	clk =0;
	}
	dbg =1;
	dbg=0;
	// Timer1.pwm(CLKPIN, 512); // fast clock
	/* dbg=1;
	for(i = 0; i < 300; i++)
	{
	samples[i] = analogRead(A0);
	//delayMicroseconds(2000);
	}
	dbg=0;
	*/
	// sample front porch reference level 2 clocks later, for 80 hs clocks
	// sample bins 83 clocks after fast start
	// bins seem to be 215 clocks wide, 12 bins, 1 clock per pixel
	//delayMicroseconds(1);
	#if 0
	dbg=1;
	noInterrupts();
	while(analogRead(A0) -5 < zeroLevel)
	;
	interrupts();
	// wait for voltage to increase to follow clock jitter
	dbg=0;
	#endif
	dbg = 1;
	blackLevel = avgRead(A0, 5);
	// blackLevel = analogRead(A0);
	dbg = 0;
	#if 0
	noInterrupts();
	while(analogRead(A0) -10< blackLevel)
	{
	dbg=1;
	delayMicroseconds(0);
	dbg=0;
	}
	;
	interrupts();
	#endif
	dbg = 1;
	delayMicroseconds(1);
	dbg = 0;
	/*
	delayMicroseconds(100);
	dbg=1;
	bin= analogRead(A0);
	dbg=0;
	*/
	// delayMicroseconds(2670);
	Timer1.stop();
	digitalWrite(CLKPIN, LOW);
	/*
	Serial.print("zeroLevel = ");
	Serial.println(zeroLevel);
	Serial.print("blackLevel = ");
	Serial.println(blackLevel);
	/* Serial.print("bin = ");
	Serial.println(bin);
	*/
	//delay(50);
	#if 1
	ledOff(led);
	// switch LED
	if(++led > 2)
	led = 0;
	#endif
	//ledsOff();
	// Serial.println(led);
	// Serial.print("normalized = ");
	// Serial.println(map(bin – blackLevel, zeroLevel, 1024, 0, 255));
	//delay(10); // inter line delay
	delayMicroseconds(100);
	}

view raw sketch hosted with ❤ by GitHub

	the scan head expects a trigger, then a clock, analog values come out on one of the pins during the clocking
	the first few elements are from dark elements so you can use them as a reference
	sketch reads the 3 full color fields and renders them on a ws2812b strip
	these are supposed to be in close contact with paper or something, but it works ok to about 4 inches (can resolve space between fingers)

view raw what hosted with ❤ by GitHub

Category: Uncategorized  |  Comment

Epson UK Printheads (SX series)

July 29, 2023, 6:17 am

Nothing to see here.

Epson UK Printheads (SX series)

Patent Protocol

figure 2: http://www.freepatentsonline.com/8430468.pdf

SCK  : Clock for SI&SP                                  pin 13
LAT  : Latch signal
SI&SP: Drive pulse selection data, selects nozzle
COM  : Drive signal
CH   : Connect drive input to nozzle

http://www.freepatentsonline.com/8430468.html

Click to access 20100220133.pdf

Click to access 20090066739.pdf

From: https://patentimages.storage.googleapis.com/9b/87/b8/23bb7e5e9ade1f/US6758544.pdf

Pinout guesses:

2  Gnd/NC/HV Gnd?
3  Gnd
4  3v? ref? from printer
5  3.3v from printer
6  Gnd
7  Gnd
8  <2v 1us Trig?                        Probably CH? (could be latch?)
9  3.3v? from printer
10 3v 0.5us Trig? from printer?         Probably LATCH
11 Gnd/NC??
12 Gnd
13 Clk? 100ns 3v/from printer!           Probably CLK?
14 Gnd
15 100ns 3v Data? from printer?          SI&SP DATA1
16 Gnd
17 100ns 3v Data? from printer?          SI&SP DATA2
18 Gnd
19 40v (43v from printer)
20 HV Data from printhead? from printer? (constant 1.5v with no head connected)
21 Gnd/NC/HV Gnd?                        Probably COM2

Pin	Signal	Use?
1	HV Data from printhead? (40v signal)	Probably COM1
2	Gnd/NC/HV Gnd?	Probably COM1 Gnd?
3	Gnd	Signal Gnd?
4	3.3/3v ref from printer.
5	3.3v from printer
6	Gnd
7	Gnd
8	<2v 1us	Probably CH
9	3.3v from printer
10	3.v 0.5us from printer?	Probably LATCH
11	Gnd/NC??
12	Gnd
13	Clk? 100ns 3v from printer	Probably CLK
14	Gnd
15	100ns 3v Data	SI&SP DATA1
16	Gnd
17	100ns 3v Data? from printer?	SI&SP DATA2
18	Gnd
19	43v from printer
20	HV Data?	Probably COM2
21	Gnd/NC/HV Gnd?

Category: Uncategorized  |  Comment

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  • PIC Versus AVR
  • Creating the miror swtich
  • Random SEM Images – MCM68364 64KB ROM
  • Ugly Solutions
  • The AT24C01 and the AT24C01A
  • The esp8266 and SD Cards
  • The CL0116 Solar Lantern Controller IC
  • FG-100 Soldering Iron Tip Temperature Sensor
  • Fiddling with a cheap 5 port dumb switch to add VLANs/port mirroring
  • Marking intervals in gnuplot graph (with shading)
  • The Wifi Doogle
  • awk – print text between 2 identical markers in a file
  • esp8266 SPI duplex transfers
  • A git pre-commit hook to do SVN style $Date$ substitution
  • SDG2024x Flash Recovery Files
  • SDG800 Reading out flash
  • SDG800 recovering from a hosed u-boot
  • Hacking around with a SDG800 (SDG805)
  • This picture is all wrong
  • Sony WPSD5 Surround Sound System “repair” Notes
  • A Note On The Ion Torrent Flow Order
  • Inside a cheap bubble blowing toy
  • Genia’s pore insertion technqiue
  • Interfacing Hitachi HD44780 LCDs using I2C on an Arduino
  • Notes on Genia’s new paper – nanopore SBS
  • PunkSeq10 Schematics and Gerbers
  • Are you sure this isn’t horse? – DNA Sequencing is Universal Sensing
  • Road to the $1 Genome
  • Further Details on the Illumina Firefly
  • Personal Genomics Inc./CrackerBio
  • A Solexa Story
  • Speculation on the Illumina FireFly
  • Mitutoyo Digimatic 500-133U CDL-6″B Battery Cover Model
  • Notes 16/1/2016
  • CX10 Mini Quadcopter 3D Design files
  • PunkSeq10 r2
  • Thoughts on Writing for Hackaday
  • Hobbyist Tech Magazines in Japan
  • NEC Teledata Terminal Shop Register (TD7)
  • A 1960s Japanese Telephone
  • The Repeater – CP-33 Repeat Card Player
  • Motorboard – Easydriver/Arduino/PKE243DA interface r1
  • Atari Punk Console rev3
  • Arduino 8 Channel ADC Board r3
  • Veeco Nanoscope V Multimode AFM First Imaging Tests
  • Axopatch 200A with micropipette first tests
  • Playing with a micropipette puller (Sutter P-97)
  • AD5791 Board rev4
  • Photodiode array project rev1
  • Cracklebox Build Notes
  • LEDs as light sensors
  • Playing with an Electret Mic
  • Photodiode Amplifiers (Transimpedance)
  • Scientifica Patchstar
  • NEC NP215 DLP Projector Teardown
  • AD5791 DAC Arduino shield Rev 3
  • LTC1859 ADC Board rev 2
  • Atari Punk Console Rev2
  • Can Radar Layout
  • PI P-915K238 XY Piezo stage
  • Inside the Thorlabs MDT690
  • SPM Rev2
  • Interferometer notes
  • Cracklebox rev 2.5
  • Krackdoos (Cracklebox) rev2
  • SPM Notes (3rd Sept 2015)
  • Regulator Board
  • +/- 13V Powerboard Rev2
  • Couldn’t remount RDWR because of unprocessed orphan inode list. Please umount/remount instead
  • Cheap Laser Pointers
  • +/- 13V PSU Board Bring up
  • Cheap Shenzhen Inspection Microscopes
  • AD5791 Board Patches Revisited
  • AD5791 Arduino Shield Rev 2
  • AD5791 Shield First Rev
  • Phonecall From a Scammer
  • Atari Punk Console Layout
  • LTC1859 8 Channel, 100KSPS +/- 10V 16bit ADC Arduino Shield layout
  • Starpack 136 Powersupply
  • Surface Pro 3 Charger “Repair”
  • Kraakdoos Layout
  • Picomotor driver scope traces
  • +/- 15V and 5V REF board
  • AD5791 Arduino Shield
  • AD5791 20Bit DAC Evaluation board with Arduino
  • LTC1859CG Evaluation board with an Arduino
  • Picomotor 8351 Internal Pics
  • Playing with Picomotors
  • Cheap Z-stage (SELN LZ-60 Shengling Precise Machinery CO. Ltd)
  • Chuo Seiki AMH-13
  • Basic bowtie2 alignment notes
  • Using BLAST+ for nucleotide alignments
  • Interfacing Chuo Seiki stages
  • Axopatch 200A Internal Pics
  • Lab workbench build notes
  • In-place Radix sort O(k) space overhead
  • Finding the majority element in a list
  • Keyence VE7800 PCB Pics
  • Keyence VE7800 Operating Procedure
  • esp8266 and kr580vm80a image maps
  • Creating LeafletJS tile sets in golang
  • Fractal Slippy Map in golang and LeafletJS
  • Serving server generated PNGs over HTTP in golang
  • Creating a PNG image in golang
  • A short review of linear motion
  • Vacuum pump types
  • Sputtering machine notes
  • Imaging of Rice – A review
  • Visit to see a SEM (electron microscope)
  • Elmo CCD Security camera
  • National “TV Camera” Vidicon
  • Installing the esp8266 SDK
  • Kindlegen, W14001: Hyperlink not resolved errors
  • Kohzu linear stages
  • Chuo Seiki MMU-60X-H1 XY Stage
  • Simple scatter plot in gnuplot
  • MPR121 Captouch sensor notes
  • MMA7455L 3-axis accelerometer notes
  • hp t5325 thin client information and manuals
  • HY-DIV268N-5A Stepper driver with Arduino
  • Using kindlegen to make a Kindle book
  • SEM (Scanning Electron Microscope) Notes
  • The Maximum Subarray Problem
  • Most common git screwups/questions and solutions
  • Select random line from a file in a single pass
  • Serving content over HTTPS in golang
  • Serving gziped connect via HTTP in golang
  • Connect via a SOCKS server in golang
  • USRP1 simple data capture in C++ example (UHD)
  • ESP8266 – esp1 PCB scans
  • Portable electronics toolkit
  • Ultra-cheap Chinese Microcontrollers
  • Some simple Arduino code to read from a keypad
  • Using the Arduino tools from the Linux command line
  • Simple JS->DNS Proxy with golang server side
  • esp8266 IoT SDK 0.9.5 release, my notes
  • Olimex esp8266 PCB Schematics/Layout
  • esp8266 analogue input
  • esp8266 notes summary
  • MSP430Watch2 – Barometer and Wifi (PCB Design)
  • BMP180 Barometric Pressure Sensor
  • Creating an SVG in Javascript using FabricJS and downloading it locally
  • Creating an SVG in Javascript, trivial example
  • esp8266 esp1 device programmer gerbers
  • Kicad Gerber renaming script for OSHPark (and seeed etc) submission
  • esp8266 sleep modes
  • Anritsu MT8815b Radio Communication Analyzer Notes
  • The esp8266 run loop and messaging
  • golang websocket to tcp forwarder
  • esp8266 access point mode notes
  • Some esp8266 SDK Library symbols
  • esp8266 writing to internal flash (basic key/value store)
  • Accepting incoming tcp connections on the esp8266 (trivial example)
  • esp8266 XBee carrier board PCB design
  • esp8266 GPIO input configuration
  • esp8266 serial (UART0) tx/rx
  • esp8266 wifi doesn’t connect
  • esp8266 module types
  • A standalone sscanf implementation (for the esp8266)
  • Safecast NEMA format notes (bGeigieNano)
  • Installing Nagios on Debian Jessie and SNMP (UPS) monitoring
  • Posting to the Safecast API from the esp8266
  • esp8266 client mode (connect to remote host) simple example
  • Paldio パルダイオ 623P
  • A Par can stage light notes
  • Arduino SNMP Voltage Monitor
  • ESP8266 Notes
  • Gorilla Websockets, golang simple websockets example
  • Getting to awa-kamogawa from Tokyo by train
  • Emscripten calling JS from C and returning by reference (pointer)
  • Calling JS from C using EM_ASM in Emscripten
  • Compiling OpenSSL and libssh2 with emscripten – notes
  • Sony/Tektronix 3066 DC-3GHz Realtime spectrum analyzer
  • TDS2024 Images
  • Very Simple Websocket example in golang
  • Typical NPN transistor configurations
  • STM vibrational compensation
  • Agilent 6624A DC System Power supply
  • A 2N2222 die image
  • Astable multivibrator RGB flasher PCB design
  • The iPhone’s MEMS sensors
  • A Common Emitter Hartley Oscillator Notes
  • Logitec LBT-VRU01 (bluetooth LE iPhone locator?)
  • NPN Common Collector, Colpitts oscillator notes
  • Tank Circuits
  • NPN BJT Common emitter inverting amplifier
  • Simple example of SDL in Emscripten (generating graphics from C)
  • Phase Shift Oscillator – High Pass configuration
  • Phase Shift Oscillator
  • Casio F91W dimensions
  • Astable multivibrator oscillator and a little oscillator history
  • Electromechanical Oscillator
  • C++ convert to/from string
  • Asimov on DNA Sequencing
  • Simple basic heatmap in D3.JS
  • Simple Bar and XY line graph in D3.JS
  • Cutting down LCDs
  • Driving a tiny stepper on an Arduino (without a driver!)
  • Stepper motors notes
  • Read a local file into a Javascript string
  • Lack of return causes abort() in Emscripten
  • Calling C from JS with Emscripten, minimal examples
  • Barco OMIX O10 8×11 LED array teardown
  • Adding a new program to alternatives manually
  • Debian Jessie Emscripten installation notes
  • MSP430 with ST7032i, now working!
  • An ST7032i on an Arduino Uno
  • Union Microscope
  • IBM Laptop Supervisor (BIOS) password reset
  • STM32-Discovery on Linux
  • Slippy maps
  • msp430f2013 I2C frustrations
  • Inside a 1USD Fingerprint reader
  • MSP430 Development on Linux using the eZ430-F2013
  • CCD Notes
  • Canon Ixy 60 CCD experiments Part 2
  • Nginx caching reverse proxy configuration
  • Canon Ixy 60 (Powershot SD450)

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• About

  My name is Nava Whiteford. I’ve worked for a few sequencing companies. I have equity in a few sequencing companies based on my previous employment (I try to be unbiased in my posts).  You can contact me at: [email protected]