Optical tachometer (CB9349E)

We found this circuit in a 1970 publication by General Electric. The components can be changed according to the indicator.

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Sequential Flasher (CB25044E)
We found this circuit in the February 1987 issue of Radio Electronics magazine. It is based on an...
Fence Electrifier (CB12895E)
This circuit is from an Argentine publication from the 1970s but can still be assembled with...
Power stage for oscillators (CB22383E)
We found this circuit in a publication from the 90's. The circuit is used with sinusoidal...