Found in a Popular Electronics from the 90s, this circuit makes use of an unusual integrated today. The coils are for the medium wave range.
This fully isolated control circuit provides an output signal by triggering a 130 mA relay when...
The capacitor used in this circuit can have values between 5 and 30 uF. The circuit is of old...
We found this circuit in an old Argentine publication. The transistor can be replaced by a more...