Electronics circuits
DIGITAL STOP WATCH
Here’s a digital stop watch built around timer IC LM555 and 4-digit counter IC with multiplexed 7-segment output drivers (MM74C926)....
Fridge Door Alarm Circuit
This fridge door alarm is using a 3V battery supply should be placed (in a small box) in the fridge...
Infrared Beam Break Detector
Application An infrared detector that sounds a buzzer when an IR beam is broken, meaning the IR signal is lost....
