Simple IR to RS232 (w RS232 shield) unstable

TomGeorge:
Hi,
This is possibly the schematic of your shield.

Tom.. :slight_smile:

Thanks! (As if I'm good at reading these schematics :D)

Could my trouble be GND related, in as some error in not having common ground between the powersource/Arduino/IR Reciever/End product that i control w 232?

I really have no clue what to do to fix this. It's what i got the Arduino for