We found this circuit in the May 1996 Electronics Now magazine. The relay must have a voltage according to the circuit power supply and a trigger current of no more than 50 mA.
Currents up to 1.5 A can be regulated with this circuit. The resistor R that determines the...
We found this precise crystal oscillator for the 144 MHz band, depending on the crystal used. The...
This circuit was found in an English publication from 1967. The circuit is for listening on a...