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Problem in module Sim908 - doesnt work

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behnam9856 said:
allright, my problem was because of GND wire and noise on the circuit!

i designed another PCB with wide GND wire, alsi i used polygon under sim908 and around it...

i used LM75CV and a 1n4007 for power...

here's my pcb in altium designer 9.4

**broken link removed**

hope to help u...

P.S, try to use MAX3232 instead of MAX232 if u're using COM port.
Click to expand...


Hi
Cann you please send me the schematic and layout considerations because i am facing same problem with my design.
 

Please, can someone upload a schematic circuit?
 

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