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.
For those who still listen to vinyl records, but because they are old and worn, they have a lot of...
Coupled to a bell, this year 2000 circuit provides an indication for attendance, if the person is...
This circuit from a 1970s General Electric publication applies to motors of the series winding type....