vinodquilon Posted March 31, 2010 Report Share Posted March 31, 2010 Here I am presenting my final mini-project setup.See the attachment in this forum or the link...http://www.scribd.com/doc/29233455I express my sincere thanks to all forum members for there great supportwithout whom this project wouldn't have been a reality.Still I am welcoming new ideas to improve my final circuit.DTMF_TouchTone.rar Quote Link to comment Share on other sites More sharing options...
vinodquilon Posted March 31, 2010 Author Report Share Posted March 31, 2010 7805 ic labels are reversed, I will clear it.at board 3 there should be 4.7K replaced with 470 Ohm and a 1K preceding all LEDs. Quote Link to comment Share on other sites More sharing options...
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