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
Learn these transformerless power supply circuits, use a capacitor instead, it smaller and lighter than transformer. There are circuits as follows. Read more
Have you ever used the NE555 timer? The 555 (read “triple five”) is a short way of saying LM555 or SE555 or NE555. I have used it for 36 years. Now, it still is not out of date. Why would we keep using it? Let me explain how to use it in a simple way. … Read more
Learn transistor circuit works, old parts But, we often use it. Because of durable, high current. Whether any reason. Let’s learn they works in simple way. Read more
TL084: low noise OP-AMP in cheap. Use JFET input. Why popular in audio & a lot of circuits: wide bandwidths and fast slew rates. Example: Read more