This article tell how to make new type of Infrared (IR) Intruder Alarm Circuit. It can find person who walk through invisible light beam. Circuit have two main part: one transmitter and other one is receiver. Transmitter send out one infrared light beam across a room. If someone goes in front of light the LED […]
Simple Transformerless Power Supply Circuit
This article show how to make small and Simple Transformerless Power Supply Circuit. It changes big voltage from wall socket to small voltage for electronics. It does this in smart way with no need of big transformer. WARNING: High voltage is dangerous. Only make this when adult is there and watching. What is a Transformerless […]
Automatic Dimmer Dipper Circuit for Automobiles
Automatic Dimmer Dipper Circuit for Automobiles is a simple and small electric device for vehicle. It is used for change headlight brightness by itself when other vehicle come from front. Because too much light can make other driver blind at night, this can make an accident. So main purpose is make driving more safe. When […]
Bench Power Supply Circuit
This circuit is Bench Power Supply Circuit which is easy to use and works good. We can change voltage and see current. What is a Bench Power Supply: Bench power supply circuit be useful device which gives steady and control power for working in lab, workshop and testing electronics. This circuits main job is give […]
Constant Voltage, Constant Current Battery Charger Circuit
This Constant Voltage, Constant Current Battery Charger Circuit talks about how to make smart 12V battery charger! It uses one common chip named LM317 IC. This charger give two thing always same: voltage and current. Voltage help stop too much load on battery. Current ensures battery charges slowly and safely. What is a Constant Voltage, […]
High Current Adjustable LM317 Power Supply Circuit
In this post IC LM317 is chip for controlling voltage but it give only 1.5 amp current. We can add one more part called TIP35 transistor with LM317. When LM317 tell it and this transistor act like a follower. Now with this transistor LM317 can handle big current up to 10 amp. This article for […]