This circuit turns off after a time given by capacitor C1. This component can have from 1 to 1,000 uF depending on the desired time. The circuit is from an Electronics Now from June 1995.
Found in documentation from the 90s, this circuit makes use of components from the period....
The operational of this amplifier can be the 741 and the resistors R1 and R3 are of 10 k. R2B is...
This circuit immobilizes a vehicle approximately 1 minute after the theft. The circuit can also be...