Voice Activated Switch (CB5982E)

This 80's documentation circuit includes an amplifier of the era. Used integrated circuits are uncommon today but can be used equivalents.

| Clique na imagem para ampliar |

CW Monitor (CB21766E)
This telegraphy broadcast monitor delivers a signal to a speaker from a unijunction transistor...
1200M ohm probe (CB6452E)
Suggested by a 1965 Electronic Design, this circuit was originally proposed for oscilloscope...
330 Degree Control with SCR (CB6565E)
Suggested by an American documentation for 1969 neon lamps, this circuit provides SCR control with...