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Gadget Freak Case #126: Talking to Your Gadgets Remotely
Design News Staff -- Design News, September 21, 2008
Want to turn on your home's heating system before you arrive? Would you like to double check your home alarm from your car — or your car alarm from your home? Alvaro Mautone created a gadget that allows you to use your cell phone to control appliances and alarms from a distance up to 500m. Mautone uses the serial port in his cell phone to create SMS (short message service) messages to electronic devices to turn them on, turn them off or simply check their status. And he's able to create this handy device while spending less than $50 in components.
Get Build Instructions | View Parts List | Post a Comment | Watch the Video
| Amt | Part Description | Allied Part # |
| 1 | Microchip 16F628A | 383-0400 |
| 1 | Crystal Oscillator | 895-0604 |
| 4 | Resistor R1, R4, R6, R11 | 296-4663 |
| 1 | Resistor R2 | 296-4675 |
| 1 | Resistor R3 | 296-2182 |
| 2 | Resistor R5, R8 | 296-2124 |
| 1 | Resistor R7 | 296-2181 |
| 2 | Resistor R9, R10 | 296-4682 |
| 1 | Resistor R12 | 648-0093 |
| 3 | Transistor Q1, Q2, Q3 | 431-0470 |
| 1 | Relay K1 SPDT | 788-1096 |
| 1 | JP1 Jumper Connector | 518-0071 |
| 4 | Diode D1, D2, D6, D8 | 950-0212 |
| Get the Build Instructions |
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please send me your electric diagram and code source
michel court payne - 2009-29-8 09:52:08 EDT -
could you please send me all other relavent information in relation to this article? i need the source code (hopefully written in C language) and more details about the circuit diagram. my email is michel.court.payen@live.co.uk
thank you
michel.court.payne - 2009-16-6 23:10:29 EDT -
I send electric diagram and code source, I don't know what happend with all informations.
Alvaro Mautone - 2008-24-9 07:23:33 EDT -
This is not a worthless project, if [like most countries] you don't pay to receive SMS messages, you use a prepay phone for the RX unit, which costs nothing to run.
However a circuit diagram & source code are needed to make this a worthwhile project.'>Maybe the 500m meant 500 miles, rather than 500 metres?
You don't use the phones walkie talkie style you use them via the GSM network.
This is not a worthless project, if [like most countries] you don't pay to receive SMS messages, you use a prepay phone for the RX unit, which costs nothing to run.
However a circuit diagram & source code are needed to make this a worthwhile project.
Hiro Protagonist - 2008-23-9 12:19:08 EDT -
The implication is that the phones us RF to communicate directly to each other, thus the 500 meter range number. As far as I know cell phones are unable to used walkie talkie style. There is no schematic per se in the pdf document, but you could create one using the PC board images
doug younker - 2008-23-9 10:18:16 EDT
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