Modulated infrared emitter (CB7251E)

Found in a 1968 Mullard manual, this circuit can function as an infrared audio link. The transistors can be the BC548.

| Clique na imagem para ampliar |

LM3600 Amplifier with AGC (CB25149E)
This circuit with automatic gain control was found in the July 1988 issue of Radio Electronics magazine....
Instrumentation Amplifier (CB4928E)
This circuit makes use of older operational amplifiers, but can be designed on the basis of modern...
Video amplifier 2 (CB9418E)
Found in an old American publication, this is one of many possible configurations for an analog...