Welcome to this page on how to modify a old cell phone to work with your security system all you need is a cell phone with one touch dialling or speed dialling on it and a cheap relay to make it work.
On the flash video above you can see the modified mobile phone call my phone with the help of a simple circuit and power from my security system
How to build your own follow the information below.
Here is a photo of the finished unit above I have used a PP3 Battery clip to test the unit if it works like the video above then you have done it right .
1). I set this page up to help people on a low budget add a monitoring system to there security system.
2). I will cover the items you will need to build a modified cell phone to work with your security system I will cover the monitoring system for homes or offices.
3). Things you will need one old cell phone I will use a Nokia 3310 for this any cell phone with one touch or speed dialling will work try ebay for a old Nokia 3310 cell phone as there seems to be a lot of them for sale cheap on ebay Click here
4). You will all so need a cell phone opening kit see photo below or you may get one on ebay cheap from time to time. The kit below Contains useful tools designed to assist in the opening and repair of mobile phones especially suited to Nokia and Ericsson and Motorola phones but equally useful when attempting repair on other models click here.
5). You will all so need solder and a soldering iron I used the Maplin Gas Torch Combination Kit see photo below. You can order this kit from Maplin click here or you local electronic shops or stores.
Below a very useful relay kit for this project.
7). If you want to make a professional looking unit then you can order a simple Relay Kit like the one above Click here.
8). Now you have the equipment you need to modify a cell phone you can move on to the next part of the set up Click here.