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noise troubles with my pic16f84a, any help?

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proyex

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:cry::idea:

i had design a rf system to control a servo motor , problem is when rf transmitter and receiver is working, my pic has a erratic performance, so i believe my pcb pic is working as an anthena, i got my pic conected to ht12d an the pic controls servo signal

if a run the system using sensor instead ht12d the pic is working fine, but system become unstable when rf system works

what can i do? any suggest? thank you
 

mvs sarma

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isolate the pic signals from the radio board by high speed Opto couplers. let the power supplies for the two sections be different.

Have a decoupling capacitor and a series choke in the Vcc lineof the PIC supply.
try to shield the rf parts of your projct in a metal or aluminium casing.

Mostly problem will be solved.

Sarma
 

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