False alarm (CB6775E)

This circuit was found in a 90’s Electronic Design. The circuit uses components that are still common in the market and indicated for use in the car.

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Flip Flop for Nixie Tube (CB6689E)
Found in a 1965 Electronic Design, this high voltage circuit uses period transistors. Its purpose...
Precision current source (CB9666E)
Found in a manufacturer documentation from the 1980s, this circuit supplies currents that depend on...
Variable voice filter (CB7569E)
This variable filter that lets frequencies from 500 Hz to 1500 Hz pass through was found in a...