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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Circular Pattern Generator (CB5436E)
This circuit generates circles on the screen of an oscilloscope. The circuit is from old...
Milliohmmeter (CB25813E)
This very low resistance meter was found in the February 1995 issue of Electronics Now magazine. The...
Synchronized photoelectric switch (CB6864E)
This switch can only be triggered when the mains voltage goes through zero and can operate as a...