This circuit activates a relay after a time given by C1 and R1. The circuit is from a Radio Electronics from December 1974. The relay voltage is the same as that used in the power supply.
The circuit of the figure serves the same purpose as the previous one (CB5057E), but has a...
In the figure below we have a typical circuit for applying a current sensor that can be used in...
The figure shows a way to apply gain control to the LM3600 OTA. The circuit is from a Radio...