Automatic night light (CB7193E)

This circuit is from a 1965 General Electric hobby manual. The circuit can be assembled with sensitive reed relays.

| Clique na imagem para ampliar |

Voltage controlled oscillator (CB20605E)
This VCO makes use of components from the 1980s. The circuit can be implemented with modern...
Ambient light indicator (CB21567E)
This circuit uses an LDR as a sensor to trigger an LED indicator at a preset lighting level. The...
High Impedance 2 W Amplifier (CB6163E)
This circuit was found in a 1968 General Electric documentation. It has an input impedance of 2 M ohms...