Welcome to the follow on from my how to modify a simple smoke alarm with a cell phone below you can see the smoke alarm activating the cell phone and phoning my mobile next to it.
Please click on the start button on the small screen on this page just below where it says preloading.
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17). How the units work is simple as soon as the smoke alarm detects smoke it will activate the alarm and send power to the smoke alarms inbuilt bulb, this will all so send power to our transmitter and send a signal to our receiver and the receiver will turn on a relay and activate the modified cell phone or your security system.
Please keep in mind it may be best to have the cell phone signal go to a back up mobile phone you carry on you this is because the unit will keep sending the signal as long as it is activated.
This will depend on the type of receiver setting you have set.
This depends on the type of radio link and the settings you pick.
You may like to add a electronic timer to the unit.
18). Now you can down load the video to see it in action as well here.
19). Modifying a cell phone click here.
20). Radio link set click here
21). Smoke alarm with light built in all good stores or order it from Argos click here.