When there exists no water in the tank and zero water is flowing out of the pipe plug, the pump motor could be equipped with an efficient dry run protection […]
Motor Dry Run Protection Circuit using IC4049
Six NOT gates from the IC 4049 may also be used to create a completely automatic version of a motor dry run protection circuit as seen below. This setup should operate […]
Low-cost Transformerless Hi-Watt LED Driver Circuits with Surge Protection
I was forced to address the issue once and for all after receiving a growing number of reader complaints about burning LEDs related to my previously released transformerless 1 watt […]
Automatic Kennel Door Circuit with Day Night Lock
This article explains a simple automatic door locking system that works when day turns into night. This clever setup is made to automatically unlock a kennel door in the morning […]
Transformerless 220V Lamp Chaser Circuits for Festival Decorations
In this article I will explain a few exciting and compact light chaser circuit that operates on both 220V and 120V power sources. This circuit enables us to light up […]
Simplest Mosquito Repellent Circuit using Transistors
Let’s face it, mosquitoes are some of the most annoying bugs out there. They not only bug us like crazy but they also have the potential to spread some really […]