5V switch (CB8705E)

Found in a 90s EDN, this circuit makes use of period components. The maximum current depends on the MOSFET.

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Overtemperature Alarm (CB26158E)
This circuit was found in the Electronics Experimenter Handbook from 1991. The sensor is a diode...
Photodiode P Receiver (CB11905E)
This circuit can be used on audio, video, or data links to receive modulated infrared signals. The gain is...
AM Modulator 78xx (CB15167E)
With this circuit it is possible to obtain a voltage modulated in amplitude with a maximum current of...