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i want to build an in expensive gsm relay, controlled by phone call detect. i found this
http://www.jameco.com/webapp/wcs/st...Id=10001&ddkey=http:StoreCatalogDrillDownView
it use the backlight of a mobile phone to detect the ringing of phone, i would like to develop a circuit to work instead of the mobile phone. how would i go bout this?
http://www.jameco.com/webapp/wcs/st...Id=10001&ddkey=http:StoreCatalogDrillDownView
it use the backlight of a mobile phone to detect the ringing of phone, i would like to develop a circuit to work instead of the mobile phone. how would i go bout this?
