• Harman Hack World Tips & Tricks

How to make a DIY Door Alarm - Theft alert Alarm

Updated: Jul 17, 2020

In this video, I made an Anti - Theft Alarm by using very simple and easily available at the house.

Things Required -

  • Wooden Plank

  • Steel Bowl

  • Nuts & Long Bolt

  • D.C. Motor

  • Rubber bands

  • Clothespin

  • Switch

  • Battery

  • Thread

I started by using a plywood board. Then I used a steel bowl to use as a bell and using a nut as a striker and tied a rubber band to a dc motor which will spin and strike to the bowl producing bell sound.

Now, as a ring bell mechanism is ready. You can also use a switch in the mechanism as well. Now to make a jump switch with the help of a clothespin. Then, I added a jumper wire as well to the clothespin. The mechanism works in such a way that when you pull the jump wire trigger, it will complete the circuit and ring the bell.

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