This is a Simple Automatic Motion Sensor Light Circuit. When we use battery electricity for lighting—even with LED light bulbs that consume very little power—for an extended period of time, it also drains much of the battery’s power. So, is there a way we could save as much electricity as possible? In some places where … Read more
You have a private area, right? If you have this motion detector alarm circuit. It will reduce your worries. Imagine a big bear is coming to the behind of your house. Then, the siren alert. The big bear is shocked and runs away. You and your family are safe. Is it great? Read more
This is a Ghost Detector circuit or Static Charge Monitor circuit by Lennie. The Label was printed on card stock; clear coated with light coats of spray enamel; cut, and attached down a tomato paste can. This article was copied from Lennie Zink’s article.
Learn types of rectifier circuit using op-amp. A diodes cannot rectifier ACV lower mV. But 741 rectifiers can help it, in filters, signal measurements, etc. Read more
Modify cheap mobile phone charger inside is simple DC switching regulator circuit and can apply many ways, such as DC power supply Read more