Contactless temperature sensor (CB7109E)

Found in an American documentation from 1968, this circuit senses the temperature through an infrared sensor of the time. The indicator is analog.

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Alarm With Magnetic Keychain (CB17201E)
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Sensitive electronic relay (CB23762E)
We found this circuit in Radio Electronics magazine from October 1966. The circuit uses a 15 V...
PWM controller with high-side Drivers (CB12518E)
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