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Kerry D. Wong

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Category: AVR/Arduino

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Interfacing a Noritake VFD Module with Arduino

October 1, 2018 kwongLeave a Comment on Interfacing a Noritake VFD Module with Arduino

I recently bought a Noritake-itron VFD module off eBay. Noritake-itron specializes in making vacuum fluorescent displays for many OEMs. As […]

AVR/Arduino, Electronics Arduino, Arduino Nano, CU20026-TW200A, CU20026SCPB-T26A, itron, MCU, Noritake, Vacuum Fluorescent Display, VFD

Building a Single Pixel Scanner

July 1, 2017 kwong7 Comments on Building a Single Pixel Scanner

A flat bed scanner typically uses three rows of CCD sensors (RGB) to capture images placed directly on top of […]

AVR/Arduino, Electronics Arduino Due, HP 7044A, MATLAB, Plotter, RGB Color Sensor, Scanner, X-Y Recorder

HP 7044A X-Y Recorder Teardown, Lorenz Attractor

April 30, 2017 kwong7 Comments on HP 7044A X-Y Recorder Teardown, Lorenz Attractor

I picked up an HP 7044A X-Y recorder on eBay recently. This one was made in the early 1980’s and […]

AVR/Arduino, Electronics, Teardowns 2N3054, 2N5956, 74L121, Arduino Due, Chaos, HP 7015B, HP 7044A, Lorenz Attractor, Plotter, Recorder, X-Y Recorder

Interfacing HDC1050 with Arduino

October 16, 2015October 16, 2015 kwong4 Comments on Interfacing HDC1050 with Arduino

Recently, I got my hands on TI‘s HDC1050 low power, high accuracy digital humidity/temperature sensor chip. The supply voltage of […]

AVR/Arduino Arduino, Atmega328P, HDC1050, I2C

Turn Your Android Phone into a Wireless Touchpad

January 18, 2015January 20, 2015 kwong1 Comment on Turn Your Android Phone into a Wireless Touchpad

In this blog post, I will show you a simple way of turning your Android phone into a wireless touchpad. […]

AVR/Arduino, Coding, Electronics Android, Arduino, Arduino Due, BC417, Bluetooth, HC-06, HID

Using Arduino Due’s True Random Number Generator

October 19, 2014 kwong7 Comments on Using Arduino Due’s True Random Number Generator

Arduino Due uses an Atmel SAM3X8E ARM Cortex-M3 CPU, which has a native hardware based True Random Number Generator (TRNG). […]

AVR/Arduino Arduino, Arduino Due, ATSAM3X8E, TRNG, True Random Number Generator

On Arduino Due PWM Frequency

September 21, 2014 kwong13 Comments on On Arduino Due PWM Frequency

I just got myself a couple of Arduino Due boards. While they were released almost two years ago, I have […]

AVR/Arduino Arduino, Arduino Due, ATSAM3X8E

DS3232 Clock Frequency Calibration

July 19, 2014 kwong6 Comments on DS3232 Clock Frequency Calibration

DS3232 is an extremely accurate RTC with a guaranteed accuracy of 2.5 ppm (0 °C to 40 °C), which translates […]

AVR/Arduino, Electronics Arduino, DS3232, HP 5350B, TCXO

Backup and Flash Firmware using Arduino

May 23, 2014 kwong2 Comments on Backup and Flash Firmware using Arduino

A while ago, I did a tear-down of a Keithley 196 bench multimeter. Towards the end of that post I […]

AVR/Arduino, Electronics 27128, 2764, Atmega328P, EPROM, Firmware, Keithley 196, Keithley 197

MCP3903 Library

May 10, 2014 kwong26 Comments on MCP3903 Library

MCP3903 is a six channel Delta-Sigma A/D converter. It features six synchronous sampling differential channels which can be programmed to […]

AVR/Arduino, Coding Analog/Digital Converter, Arduino, Atmega328P, MCP3903

Modify An Off-the-Shelf CP2102 Module As An Arduino Programmer

May 3, 2014 kwong9 Comments on Modify An Off-the-Shelf CP2102 Module As An Arduino Programmer

A while back, I wrote an article on how to use a CP2102 USB/UART converter chip in place of an […]

AVR/Arduino, Electronics Arduino, Atmega328P, CP2102

Arduino Library For LTC4151

April 19, 2014 kwong18 Comments on Arduino Library For LTC4151

LTC4151 is a high voltage I2C current and voltage monitor. It is capable of monitoring input voltage ranging from 7V […]

AVR/Arduino, Coding Arduino Library, Atmega328P, LTC4151

A Digital Thermometer Hygrometer With Analog Displays

March 29, 2014April 3, 2014 kwong4 Comments on A Digital Thermometer Hygrometer With Analog Displays

It seems that you can’t visit to a microcontroller website without seeing a digital thermometer/hygrometer build of some kind. After […]

AVR/Arduino Hygrometer, MCP1700, MG90S, Servo, SHT21, Temperature Humidity Sensor, Thermometer

Extending DAC Resolution Using Digital Potentiometer

March 9, 2014 kwong1 Comment on Extending DAC Resolution Using Digital Potentiometer

One way to extend the resolution of a digital-to-analog converter (DAC) is by employing a sigma-delta converter in software. The […]

AVR/Arduino, Electronics AD/DA, AD5206, AD8603, Arduino, DAC, LTC1665, TLV5620

Arduino Libraries Uploaded to GitHub

February 11, 2014 kwong1 Comment on Arduino Libraries Uploaded to GitHub

Over the years I have created quite a few libraries for Arduino. I finally uploaded them to GitHub a couple […]

AVR/Arduino Arduino Library, GitHub

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Tools & Libraries

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  • A Sensitive DIY Ultrasonic Range Sensor (286)
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  • A Digitally Controlled Dual Tracking Power Supply -- II (88)
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  • Hacking DTM0660L Based Multimeters (72)
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  • Reverse Engineering the Syma S107G IR Protocol (56)
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Recent Comments

  • efkar on AD7705/AD7706 Library Revisited
  • Peter on AVR LC Meter With Frequency Measurement
  • Calvin Love on Arduino Library For LTC4151
  • kwong on AVR LC Meter With Frequency Measurement
  • kwong on Teardown Pictures of an HT118A Multimeter
  • Peter B. on AVR LC Meter With Frequency Measurement
  • James Kelly on Teardown Pictures of an HT118A Multimeter
  • Robin E Midgett on HP 8620C Sweep Generator Repaired
  • kwong on HP 8620C Sweep Generator Repaired
  • kwong on Experiments with a Hydrogen Thyratron

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