Heterodyne Mixer (CB4291E)

This is a typical 80's FM radio mixer circuit. The circuit was found in a documentation of the time.

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1.5 V LED Flasher (CB20423E)
This circuit causes an LED to blink from the 1.5 V supply thanks to the use of a voltage doubler. The...
Transistor Tester (CB10831E)
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
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