Found in the July 1994 Electronics Now magazine, this circuit drives a relay up to 12 V depending on the power supply. The transistor can be general purpose.
The coil and sockets of this circuit found in a QST depend on the frequency band that is intended...
Indicated for discriminators adjustment in FM and VHF receivers, this circuit was found in a 90s...
Mouser Electronics is making available the Texas Instruments DRV401 Q1 integrated circuit, a...