This circuit for receivers was found in an American documentation from the 90's. The circuit operates at up to 500 MHz. The integrated circuit used is uncommon nowadays.
DC motors of 6 to 12 volts and currents of up to 2 amps can be controlled with this circuit. The...
This is an amplifier that uses a pickup coil placed next to the telephone set and the listening is done in...
This circuit was found in a French documentation from the 80's. The circuit must be powered by a...