Light operated switch (CB8278E)

The circuit shown was found in a 1967 RCA manual. Modern equivalent components can be used. The SCR must be according to the controlled load.

| Clique na imagem para ampliar |

4-Channel Remote Control Transmitter (CB18604E)
The circuit presented is quite simple, employing tone modulation of the signal. To receive the...
Light trigger with Schmitt and SCR (CB23963E)
This fast-acting circuit was found in the July 1969 Radio Electronics magazine. The trigger point...
Microphone preamp (CB22043E)
This preamp was found in an old English publication. Any usage JFET can be employed. The output is high...