This sensitive circuit was found in the June 1995 Electronics Now magazine. R1 can be from 10k to 1M depending on the desired sensitivity. Power is supplied by the relay.
We show an oscillator that produces rectangular TTL signals based on inverters. Inverters can also be...
We found this circuit in the March 1995 issue of Electronics Now magazine. The circuit has a...
This circuit, with an operational amplifier, was found in the Motorola Dataar Linear of 1990. The...