Ion generator (CB7837E)

This negative ion generator was found in a 90s Popular Electronics. The autotransformer can be an automobile ignition coil.

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555 Delayed Pulse Generator (CB24440E)
This common 555 circuit was found in documentation from the 90s. The circuit uses two 555s and the...
Garage Timer (CB21432E)
Found in General Electric and 1967 documentation, this circuit automatically turns off the...
Unijunction Transistor Teste (CB1357E )
This tester for common unijunction transistors is nothing more than a low frequency oscillator...