Gain 1000 Amplifier (CB8998E)

This circuit was obtained in a 90’s documentation. The operational amplifiers are from that time.

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Pulse Generator (CB24524E)
Using the 555 and 7400 this circuit was found in the September 1977 Radio Electronics magazine. The...
Simple Continuity Test (CB20416E)
This sensitive continuity test uses two transistors and has a common LED as indicator. The input...
Transistor Tester (CB10215E)
This circuit appeared in a noverber 1962s Practical Electronics. The magazine is no more, but the...