Demonstration of a simple light sensitive switch made with an op-amp configured as a comparator. Obtain schematics for Free at http://clydelettsome.com/blog/product/light-sensitive-switch/
In this video, I describe the proper way to simultaneously obtain negative and positive voltage from a dual power supply.
Demonstration of a simple calculator made of seven segment displays, seven segment drivers, AND, OR, NOT, and EXOR gates that add two numbers together.