Found in a 90s Electronic Design, this circuit can be used as a shield in current projects. The circuit provides three levels of signals for triggering loads.
The circuit that gave rise to this configuration is from 1978. In the original publication are...
We found this circuit in Popular Electronics from 1992. Time is given by C1. The circuit provides an...
This circuit was obtained in a 1980 publication but can still be assembled today with the 106...