This circuit is from 1985 documentation. The integrated circuit is not very common today, but modifications can be made leading to a project with current integrated circuits.
This circuit can generate signals of frequencies up to 1 or 2 MHz, tuned in the capacitor. The...
This is a simple voltage tester for voltages from about 2V to about 15V with the indicated...
We found this simple undervoltage indicator circuit in a 1992 publication. The circuit triggers an LED...