Sensors and Detectors

A Powerful Metal Detector Circuit has high sensitivity and can find many metal types at different depths. Coil is important part. Big coil finds deep objects and small coil find better for small things. By using changeable coils is best for many uses. Circuit Working: Parts List: Component Type Description Quantity Resistors (All resistors are […]

This is Simple Gold Detector Circuit. It uses magnet and electric to find metal and even gold. Electric goes fast back and forth. This make magnetic field in coil. When metal come close then electric changes. It is an fun project to learn about metal detector but may not that good for real treasure. Circuit […]

LEDs mostly make light but they can also sense light! Like a secret power when light hits an LED the right way it makes a tiny bit of electricity. This is called the photovoltaic effect like a tiny solar panel. In this post for How to use an LED as a Light Detector Circuit we […]

No button needed as this circuit uses a smart chip known as TTP223 to feel our touch. Like magic it touches the pad and it turns ON or OFF This Simple Capacitive Touch Switch Circuit using IC TTP223 is an easy way to make a touch switch for fun or projects. Circuit Working: Parts List: […]

Automatic Soap Dispenser Circuit is like robot for soap. Inside it have a special plan like electric circuit with small parts. It has got sensor like small eyes, brain chip like microcontroller, and pump like tiny muscle. When sensor sees our hand its brain tell pump Give soap! and it gives the right amount. Circuit […]

Simple Bedwetting/Wet Diaper Alert Circuit is one special electronic helper! It know when someone pee in bed or diaper and then it make sound like doorbell ding ding! So parents or helper can know fast and come for help. Good for kids who pee in bed at night or people who need more help for […]