The selected circuit is from the Texas Instruments optoelectronics manual. With it you can receive optical signals in CW. Transistors support equivalents.
This RF and audio follower applies its signals to a small amplifier. The FET can be any...
This circuit was found in an American documentation from 1968. The circuit uses transistors from that...
This integrated contains a Class B circuit originally developed to provide 6 W in a car radio...