This circuit was obtained from an American 80's documentation. The balanced mixer can be shown in CB4234. The circuit is for controlling RF signals in a modulation system.
This power supply may have 5, 6, 9 or 12 V outputs depending on the 78XX and 79XX series...
Mouser has a huge list of sensors for the most diverse applications such as automation, IoT,...
This circuit consists of an audio signal tracer using two 741 operational amplifiers. The output...