Quick Start Siren (CB25765E)

We found this circuit in the October 1994 Electronics Now magazine. The CMOS IC is uncommon these days and the output is low power.

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Code Practice Oscillator (CB4207E)
Also suitable for use as a noisy alarm, this Morse Code or telegraph practice oscillator was found...
White Noise Generator LM386 (CB25298E)
The figure shows a white noise generator circuit that uses a transistor junction to generate the...
Flyback Tester (CB4644E)
Flybacks are no longer misused. However, if the reader wants to recover an old analog television...