Non Inverting Amplifier (CB6437E)

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

Polarity Indicator (CB17361E)
This ultra-simple polarity indicator uses common green and red LEDs and can work with 3 to 9 V...
20 kHz counter with SCS (CB6614E)
We found this circuit in 1964 General Electric documentation. The circuit works with mechanical...
Diac DC Over Voltage Protection (CB13366E)
This circuit was obtained in a technical publication from the 1970s. It fires a diac and thus a...