Suggested by General Electric in a 1967 publication, this circuit uses the D13T1, an uncommon SCR today. This component is triggered by the anode.
This circuit determines the frequency of a signal by beating with a known signal. The circuit was...
With the values of the components indicated, this timer controls intervals from a few seconds to a...
The purpose of this circuit is to automatically turn a water pump on and off. Sensor 1 is the...