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.
This circuit maintains on a flashing LED at a frequency determined by the capacitor. The...
This powerful FM transmitter was found in a 2002 documentation. The output transistors must be...
To implement this function, we need a relay with double contacts, as shown in the figure. With a...