Geiger Pulsating Indicator (CB23617E)

This circuit is a suggestion from a Radio Electronics from October 1964. We found it in the patent section.

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Headphone Amplifier with the 741 (CB10248E)
This circuit was found in an English magazine from 1978, but it is still current, just change the...
Overtemperature Alarm (CB11839E)
This circuit causes a buzzer to emit an intermittent tone when the temperature sensed by the...
Null adjustment shield (CB4902E)
This microcontrolled null adjustment for operational amplifiers was obtained in a Linear...