•  
  •  

Theft preventer alarm

This circuit utilising a 555 timer IC can be used as an alarm system to prevent the theft of your luggage, burglars breaking into your house etc. The alarms goes ON when a thin wire, usually as thin as a hair is broken.
The circuit is straightforward. It uses a 555 IC wired as an astable multivibrator to produce a tone of frequency of about 1kHz which gives out a shrill noise to scare away the burglar.
The wire used to set off the alarm can be made of a thin copper wire like SWG 36 or higher.
You can even use single strands of copper form a power cable.

The circuit operates on a wide range of voltages from 5V to 15V.
The speaker and the circuit could be housed inside a tin can with holes drilled on the speaker side for the sound to come out.

If there are any problems please contact webmaster@electronic-circuits-diagrams.com

Please share & like


Raspberry Pi Compute Module 4 CM4 8GB RAM 32GB eMMC Wireless CM4108032 picture

Raspberry Pi Compute Module 4 CM4 8GB RAM 32GB eMMC Wireless CM4108032

$169.00



Raspberry Pi Compute Module 4 CM4-Wireless-2GB Ram-16GB eMMC-CM4102016 SHIP ASAP picture

Raspberry Pi Compute Module 4 CM4-Wireless-2GB Ram-16GB eMMC-CM4102016 SHIP ASAP

$99.90



Raspberry Compute Module Pi CM4 | 4GB RAM, 32GB eMMC, wireless CM4104032  picture

Raspberry Compute Module Pi CM4 | 4GB RAM, 32GB eMMC, wireless CM4104032

$159.99



Ram Board Floor Protection Fiberboard, TAN  0.048

Ram Board Floor Protection Fiberboard, TAN 0.048" Thick, 38" Width, 100' Length

$110.44



Raspberry Pi Compute Module 4 Lite CM4101000 WiFI 1GB RAM , Wireless picture

Raspberry Pi Compute Module 4 Lite CM4101000 WiFI 1GB RAM , Wireless

$55.00



Ram / Cylinder Seal Kit for OTC 10 Ton Cylinder (Power Team / SPX) 300116 picture

Ram / Cylinder Seal Kit for OTC 10 Ton Cylinder (Power Team / SPX) 300116

$27.99



10 pcs TI TMS 4116-15NL TMS4116 16 Pin, DIP 16, IC Chips Texas Instruments RAM picture

10 pcs TI TMS 4116-15NL TMS4116 16 Pin, DIP 16, IC Chips Texas Instruments RAM

$9.50



Raspberry Pi Compute Module 4 CM4 8GB RAM 32GB eMMC Wifi CM4108032 - 8 available picture

Raspberry Pi Compute Module 4 CM4 8GB RAM 32GB eMMC Wifi CM4108032 - 8 available

$168.00



women RED RAM Goatskin leather WHITE TIG welding gloves S,M, L picture

women RED RAM Goatskin leather WHITE TIG welding gloves S,M, L

$8.88



Orange Pi Zero 2 Board 1GB RAM Quad-Core Dual-band WIFI Open Source Board US picture

Orange Pi Zero 2 Board 1GB RAM Quad-Core Dual-band WIFI Open Source Board US

$38.37