Everything for Electronics

Jim Teixeira

Jim's Articles

Build a Variable Voltage Reference
February 2019
While most voltage references only generate a single voltage, this design offers variable voltage from zero to 10 volts.

A 3-in-1 Tester for Your Lab
November 2016
This DIY piece of test equipment combines a variable DC voltage reference, a programmable function wave generator, and a fully functional frequency counter, and it costs less than $150.

Build a Frequency Counter
March 2015
Frequency counters have been around for years as a standard piece of test equipment in both commercial and hobby labs. If you need one for your workshop, take a gander at the one presented here.

Hack an LED Desk Lamp
May 2013
Turn an ordinary lamp into a battery operated emergency light.