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 […]
Testing of Two Three-Phase BLDC Motor Drivers
I was doing a project that needed a driver for hard disk spindle motors. While I could use a microcontroller […]
HP 6113A Teardown And Calibration
A couple of weeks ago I did a teardown of HP 6181C — a precision DC current source made in […]
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 […]
HP 6181C DC Current Source Teardown
HP 6181C is a lab grade 0 to 250 mA current source manufactured back in the late 70’s and early […]
Simple hFE Adapter For Cheap DMMs
Getting a rough measurement of the transistor hFE’s is useful when designing analog circuits. Unfortunately, only the lower end DMMs […]
LM92 Library for Arduino
LM92 is a 12-bit + sign temperature sensor from Texas Instruments. This sensor operates on the I2C interface and can […]
A Simple Serial Protocol
We can send and receive commands wirelessly with Arduino by using these cheap RF data link transmitters/receivers. I like these […]
Peltier Cooler Module Repair
I bought a couple of Peltier cooler modules on eBay a while ago for some experiments. Of course, as I […]