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Am I right in thinking when th Rpi is connected I will not get the error code 80 ?

As i have bought the bits I need, only problem is I have disconnected the 24 v supply from the signal terminals and used a independant 12v supply to activate the power supply board relay that now supplies the box lights and circuit board from its own built in transformer

now when I power up the voltage is 4v then drops to 3v at the signal and ground terminals and I have impression the most you can put on the gpio is 3.2v

any clarification would be appreciated

Paul

 

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