kwong – Page 14 – Kerry D. Wong

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 […]

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

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

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

HP 436A is a power meter capable of measuring RF power between -70 dBm and 44 dBm (roughly between 0.1 […]

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

Transistors operating in their avalanche regions are often used to generate fast rise pulses (see avalanche pulse generator using 2N3904). […]

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

I was doing a project that needed a driver for hard disk spindle motors. While I could use a microcontroller […]

A couple of weeks ago I did a teardown of HP 6181C — a precision DC current source made in […]

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

HP 6181C is a lab grade 0 to 250 mA current source manufactured back in the late 70’s and early […]

Getting a rough measurement of the transistor hFE’s is useful when designing analog circuits. Unfortunately, only the lower end DMMs […]

LM92 is a 12-bit + sign temperature sensor from Texas Instruments. This sensor operates on the I2C interface and can […]

We can send and receive commands wirelessly with Arduino by using these cheap RF data link transmitters/receivers. I like these […]