19 alarm projects

NRA allows us, in case of bike accident, to locate the injured person through the SigFox network. It also improves visibility on the road.

A simple 8x32 LED matrix alarm clock.

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

Create a burglar-tripwire with the ultrasonic sensor.

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.

Using the RCWL-0516 radar sensor to detect motion.

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.

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

DIY an alarm using Arduino UNO R3 board.

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

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.

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

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...

Want to get notified in case your mom storms into your room? I will help you in this project with the help of 1Sheeld.