DIY PMA-PMG Alternator Project

This sensitive sound operated switch can be used with a dynamic microphone insert as above, or...

Audio Jammer Noise generator for detector audio circuit

This circuit determines whether more than one input in a group of digital inputs is active. It...

This circuit responds quickly enough to prevent damage from most overloads. C 1 "s input is...

Until Willow Garage was acquired, I was working there as a Web Robotics Engineer. Really, it`s...

The telephone ring generator shown generates the bare aerial voltage from a simple switching...

This quad amplifier is actually intended to be used in a car, but it can naturally also be used...

A flushing toilet is something that most city dwellers take for granted, but it can be a luxury...

This design allows to operate two intercom stations leaving the operator free of using his/her...

Maxim now has available a series of five integrated oscillator building blocks in the MAX260x...

Contrary to what some radio experimenters think, a bipolar regenerative design can be made to...

TR-55 was the first transistor radio produced and sold in Japan. It uses the following...

Circuit shown in Figure 13-4. It uses triode control. Two transistors VTi, VTz by capacitive...

Crystal is a one-way ordinary transistor triggered threatened tube dimmer light circuit, VT2, V...