Timed Alarm (CB6423E)

We found this circuit in a 90's Popular Electronics. The circuit produces a loud sound if S2 is not pressed to reset.

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Hall Lamp Timer (CB16406E)
This very interesting project was obtained in a 1980 publication. It consists of a device that is...
5 mA Constant Current Source (CB25615E)
This constant current circuit was found in the October 1993 Electronics Now magazine. The current can...
Sinusoidal peak detector (CB21519E)
This circuit for a frequency of 10 kHz was found in an Electronic Design. It makes use of a tunnel...