This circuit was obtained from an 80's Electronic Engineering. The circuit detects ice formation by triggering a warning light. The operational amplifier is of the time.
The power supply shown in the figure provides output voltages in the range of 1.2 to 25 V with...
This circuit keeps an LED on briefly when S1 is pressed. The time depends on C1. The circuit is...
We found this circuit in a 1998 documentation. The circuit can also be used as a minutery...