Facing grounding problem issue with pic micro

Thread Starter

ep.hobbyiest

Joined Aug 26, 2014
201
Hi,
I am using PIC16f876a on 3.3Volt. I am using basic circuit and referred to following link for connection.
http://www.picprojects.net/pic1618exp-28d/index.html

I am facing problem while sending data over UART. When i touched to ground pin of controller then data is getting sent and i don't touch then data is not getting sent. I think this problem is related to ground problem.

i have provided 0.1 uf capacitor as well.
 

ericgibbs

Joined Jan 29, 2010
14,679
hi ep.
Please post a sketch showing the UART connections, as you say sounds like you have a missing 0V Common line between the to modules.
E
 

Picbuster

Joined Dec 2, 2013
1,027
Did you connect the remote unit to the same gnd?
What type of power supply are you using some do place a capacitors from main to GND.
When GND is floating output is lifted when you hit the GND offset is gone.
Try to run it from a battery and see what happened.
But this could be also the case at the connected site.

Picbuster
 
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