16 alarm projects

Make an alarm clock that will only stop once the light is on and the button is pressed using an Arduino Nano.

Create a burglar-tripwire with the ultrasonic sensor.

Using an Adafruit compass/accelerometer and an 80-decibel alarm, this project prevents thieves from stealing your backpack.

This alarm clock and timer work without the help of a computer. All the settings can be done on the clock itself and stored in the EEPROM.

This project uses an ultrasonic sensor to "sense" if the door opens or closes.

This is an alarm for your house that rings when a movement is detected, like when the door is open or when a body walks in front of it.

Using the RCWL-0516 radar sensor to detect motion.

Hello peepz, I created a little laser alarm from a laser Emitter and a Laser receiver. I used the ky-008 laser.

DIY an alarm using Arduino UNO R3 board.

Ever lose something because of someone entering your room? if you have, then I will show you how to build a low-cost alarm!

A simple burglar alarm built using an ATtiny45. You can attach it anywhere and will it will inform when someone tries to steal something.

A device that warns us with light sound and a sign when our plant needs water.

Hello world! Yep yep, I made another simple project. This time for the KY-021 Mini reed switch. It will simply turn on and off a lamp.

Want to get notified before your mom storms into your room? I will help you with this project using a 1Sheeld.

Ever want to just stay in your warm bed on those cold, dreary autumn mornings? Now you can!

In our house, we have two teenagers and 1.5 bathrooms. They both like to spend a very long time taking showers and getting ready...