Found in a 1968 Mullard manual, this circuit can function as an infrared audio link. The transistors can be the BC548.
This shield can be used both to interface TTL circuits and microcontrollers. The resistor in...
We found this circuit in an article in Electronics Now magazine from March 1996. The frequency is limited...
This directed coupled amplifier uses a transformer to drive a low impedance loudspeaker. This...