Light Sensitive Switch

Demonstration of a simple light sensitive switch made with an op-amp configured as a comparator. Obtain schematics for Free at

Why Texting Makes No Sense

One thing I get hassled about all the time for by friends and family is not having text messaging (or SMS) on my cell phone. That’s right. I am probably one of the few cell phone subscribers in America that do not have a plan that includes text messaging or even the ability to text …