http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb 2009-01-07T18:12:41-08:00 contact@nospam.com hourly 1 2000-01-01T12:00+00:00 http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 i am jst a newbie about this project thats why i need help(s) about the necessary to be done to built this project successfully..more details....more outputs...more sample...more descriptions..tnx a lot... http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 mckunatz i plan to use the cheapest phone the nokia 3315.. is it compatible for this device to the project?if not.. can you recommend me other phone type? http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 mckunatz sir, after this step..wat are d next steps to be done? http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 Ajay well it does not have at commands. and i think you can use it. if it has same protocol as 3310,download PDU converter from download section and see if you're able to send sms or not. http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 wewa I'd advise you to use a GSM-modem where you can use the AT-comandsyntax (eg. the MTC45 GSM-module).And I wouldn't use SMS-based switching. I'd use DTMF, that's very easy. You only need a DTMF-receiver like the MT8870D. Then you can (for example) call your GSM-module enter the pin and turn the light on by pressing 11# ore something else. http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 mckunatz thank you sir,.i appreciate ur advise... but i want to build this sms based device switching which is i already proposed.. i need to work on it until i finish it.. but ican not make it without ur helps sir.. yah, i have a 3310 unit too. how i shud i do it..?? http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 mckunatz http://www.8051projects.info/files/smss.GIF http://www.8051projects.info/files/smss1.GIFsir please check this link.. i want to do this schematic diagram but i dont have yet any information to this circuit.. can u explain further details to thid circuit..??? tenk you sir.. http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 mckunatz http://www.8051projects.info/images/IMAG0076.JPGin this project sir.. they used nokia 5110.. how is this sir?? is it the same with that cicuit i mentioned above..??tenks a lot for the helps sir... http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 Arun Kumar V more patientance.........Arun http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 Ajay good answer arun anyways.. first select a phone or GSM modem you are going to use.. only then you can move forward with more details and whatever stuff you asked for http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 Ajay no its not the same circuit http://www.8051projects.net/forum-t10813.html 2009-01-07T18:12:41-08:00 mckunatz sir if i use nokia 5110, how is it?