8870 based DTMF Decoder not working

[jithinnandan]

Dear all,
I'm working on a circuit to control the water pump based on DTMF code and cellphone.
But the DTMF section is not working properly.
While sending the DTMF code, pin # 11 to 14 is on high and no change in state and pin # 16 is at low state.
This is the case for all DTMF codes which we are sending.
Kindly see the circuit and somebody please help me.

 

[tpetar]

Circuit is bad, what you plan with thise diodes on output ?

See circuit examples :

http://sohilp.blogspot.com/2011/03/cellphone-controlled-robot.html

**broken link removed**

**broken link removed**

http://www.radiolocman.com/shem/schematics.html?di=35267

and if you need real DTMF multichannel remote control with several digit password access and password for each channel just say.