Precision Current Source (CB21052E)

Found in National Semiconductor documentation from the 1990s, this circuit employs basic components from the time.

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Controlled Active Cycle Multivibrator (CB15535E)
Two inverters of a 4069B type CMOS integrated circuit form this oscillator which is characterized by having...
6 x 3 LED Multiplexer Circuit 4017 (CB25437E
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One transistor radio (CB21638E)
Found in a May 1968 Supertena newsletter in Popular Electronics magazine, this mid-waveband...