Welcome to this simple page on modifying a every day smoke alarm with a radio link and a modified cell phone.

I have added a simple flash video above to let you see the smoke alarm activate the modified cell phone and call me if the smoke alarm has been activated I just pushed the button for the test.

First off we all know the benefits of having smoke alarms in our homes, offices or where ever they are used I set this page up to turn a smoke alarm in to a monitored one with out spending to much money.

The idea is to let you know your smoke alarm has been activated even if you are thousands of miles away so you can call some one to get it checked out this turns a 85 decibel smoke alarm in to the loudest you will ever hear with the help of the GSM phone network or the PSTN Network if used with your security system..

In the case you are away from your home you may have pets at home if a fire started your pets may not escape this is why I set this page up to inform you of the danger that has just activated your smoke alarm.

If you are in bed and don't hear the main alarm going off in your living room the unit will send a signal to your mobile phone if switched on and help you escape the danger faster all ways use two smoke alarms in your rooms.

Now if you think just how much electrical equipment you do not switch off like Video Recorders, Hi-Fi Systems, DVD Recorders or Players, Clocks radios, Electrical air fresheners, TV Sets all left plugged in and switched to stand by all electrical devises can go faulty and cause a fire it is not just people that smoke.

If you have electrical devises left on all the time then you may want to invest in a 30 milliamps RCD socket or adapter this will all so help to stop electrical fires from faulty electrical equipment click here.

1). In the photo below you can see a every day smoke alarm with a inbuilt light and a simple radio link transmitter and receiver the 3 units will work together.

There are two types of light smoke alarms now the bulb type and the L.E.D type you will need the bulb type this will have a voltage of about 6.6 volts and is what will run the Transmitter see the photo below to get an idea of the one you will need.

2). Now in the photo below you can see I have soldered two wires to the bottom of the smoke alarm the wire must be solders to the two connections that power the bulb this is the connections the bulb sits in as this will power our transmitter.

3). Now after you have soldered the wires to the main smoke alarm circuit board you will need to solder the two ends of the wires to the mini transmitter see photo below.

4). In the photo above you will see that you will need to solder the Negative wire black to the spring on the mini transmitter and the red wire to the positive on the transmitter.

5). Now what you will need to do is by pass the push button switch as soon as the smoke alarm activates it will send power from the main unit to the transmitter and send the signal to the receiver. Please note in the photo below I have by passed the switch with a small bit of wire.

6). If you want to you can put some thing over the switch to keep it pressed down all the time and using PVC tape wrap this around the item and around the board..

7). Now we will test our modified smoke alarm with transmitter see photo below when you come to test the unit your small transmitters light should come on as soon as you connect both batteries if not press the test button on the smoke alarm it's self. 

8). Please note if the transmitter light is still not coming on reveres the wires on the transmitters connect the red to the spring and the black wire to the positive.

9). Now we want to connect our two batteries to our smoke alarm connect the first battery to the one below the sounder or horn then connect the next battery when you connect if your transmitter lights comes on then you have done every thing right.