#simple
simple circuits ready to build, each with a parts list, a schematic and a picture showing how to connect it. Want to change something? Make your own copy in one click.
Newest circuits
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Arduino Melody Player
This is a simple project where you connect a buzzer to your Arduino to play a melody. You'll use Arduino's tone() function to play different tones and combine…
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Bird Feeder Detector
Do you want to know when there's a bird in your bird feeder? There's a circuit for that! This uses a PIR motion sensor that works with infrared light. And it…
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Simple Flashlight
This shows a very simple flashlight project with a LED and a resistor. The switch controls if the light is on or off. Build this into a small casing, and you…
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Basic LED circuit
Never built a circuit before? Then start here. You can build this in a couple of minutes. It's a simple LED circuit that's powered by a 9V battery.
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Simple Water Sensor
This project is a a very simple water-leak detector. Place two exposed wires on the floor near your washing machine or some other place where you want to…
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Mailbox Detector
This is a simple project that detects when you got mail! To build it, you need to place a permanent magnet in the lid of your mailbox. And you need to place…
