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.
November 2016 - Bourns RLB1112V4 series radial inductors are available for immediate supply from...
This circuit was found in a Hands-On Electronics from the 90's. The FET can be any general...
This circuit can be adjusted to time timer intervals up to1 hour using a 2,200 µF capacitor and a...