This article show a special trick to make a Simple Metal Detector Circuit It uses simple circuit not like other circuits and needs only one transistor. The circuit find metal by catching signal from a normal radio. What is a Metal Detector: Metal detector is electric circuit made to check if metal is close or […]
Sensors and Detectors
Simple Magnetic Field Sensor Circuit
This is an Easy and Simple Magnetic Field Sensor Circuit. It can find magnet near the sensor. This circuit is easy to make and is good for beginners. We can learn how it work and use in small projects which is very fun and useful! What is a Magnetic Field Sensor: Magnetic field sensor circuit […]
Infrared (IR) Sensor Alarm Circuit using TSOP1738
This tutorial show how to make a Infrared (IR) Sensor Alarm Circuit using TSOP1738. It finds intruder using light which we cannot see. This alarm uses infrared light so people call it IR alarm. It make one invisible light beam with small chip named IC 555. If someone walk in front of light, then the […]
Sound Activated Relay Circuit
This article show how to make one Sound Activated Relay Circuit. It uses sound for turning device ON and OFF. Relays are special parts and they control big power things like lights and motors. Here are some ways to use it: This article tell how to build and use this type of circuit. of circuit. […]
Simple Non Contact AC Mains Voltage Detector Circuit
This Simple Non Contact AC Mains Voltage Detector Circuit is to find AC voltage without touching wire, and it uses antenna to catch AC signal from air. After that, the signal goes through transistors and LED blink when AC voltage is near, also this circuit is good for safety and easy to make at home. […]
Water Level Indicator Circuit
This Water Level Indicator Circuit is a small project to show water level in tank by using 4 LED lights and each LED tells how much water is inside the tank and when water goes up more then more LEDs turn ON. Also, this circuit is easy to make and uses cheap parts and is […]