Peak sensor with tunnel diode (CB21514E)

This circuit was found in old General Electric documentation. The circuit makes use of a unijunction programmable transistor.

| Clique na imagem para ampliar |

Light Activated Switch (CB14457E)
This circuit is from 1968 documentation. We can assemble it with more modern components such as a...
Speaker protection (CB8193E)
Found in a 90s Silicon Chip documentation this circuit is intended to protect a speaker system in...
UV Sensor with UVTRON Tube (CB25942E)
The UVTRON tube is an ultraviolet radiation sensor. In this circuit from Radio Electronics from...