This circuit was found in the Electronics Experimenter Handbook of 1961. The circuit uses door sensors and others. It is powered by 12 V from the car battery.
This field strength meter is intended for the VHF range, above 100MHz. The lowest voltage or...
We show an oscillator that produces rectangular TTL signals based on inverters. Inverters can also be...
The circuit presented, from 2006, serves to control loads at a distance, robots, etc. It can be...