Debounced switch (CB6815E)

This version of the traditional debounce circuit was found in a 1964 documentation. The circuit can be designed based on modern transistors.

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Low Resistance Linear Ohmmeter (CB25733E)
One of the problems with common multimeters, especially analog ones, is that their low resistance scales...
Zero crossing with the CA3059 (CB25872E)
This circuit is an alternative version of the previous one also found in the July 1995 Electronics Now...
Electronic Bait (CB4568E)
This fish flame circuit was found in a 1971 magazine. The circuit can still be mounted with BC558...