Contactless ignition (CB6381E)

This circuit is from a 1965 Motorola documentation. The transistors are of the time as is the uninformed magnetic sensor.

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Constant Amplitude Twin-T Oscillator (CB4163E)
This circuit was found in a 1980s documentation. Modern operational amplifiers can be used. The...
AD590 or AD592 Temperature Sensor (CB25446E)
This circuit allows you to read temperatures with a common digital voltmeter. We found it in the...
Electronic Circuit Breaker (CB5898E)
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