Non Inverting Amplifier (CB6438E)

This non-inverting AC amplifier was found on a Popular Electronics. The setting applies to any operational amplifier.

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...