Timer for Windshield Wiper (CB19868E)

This circuit found in old documentation can be used on old cars that do not have this feature. The integrated circuit used is uncommon today.

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Sensitive Light Alarm (CB12472E)
We found this circuit in a 1978 technical documentation. The circuit can be assembled with BC548...
Frequency-Corrected Astable (CB25651E)
This frequency-corrected 1 kHz circuit has a nearly perfect rectangular signal. The circuit is...
Long Timer (CB13156E)
One of the problems with the 555 integrated circuit, normally used when timing is desired, is that...