Tim B Posted September 14, 2011 Report Share Posted September 14, 2011 When I turn on my core module and try measuring the pins like described on the Ucapps website: Check the voltage levels between the most important pins with a multimeter (analog or digital doesn't matter) before plugging the PIC and the 6N138 into the socket: IC1:MCLR(1) - IC1:Vss(12) = 5V IC1:Vdd(11) - IC1:Vss(12) = 5V IC1:Vdd(32) - IC1:Vss(31) = 5V IC2(8) - IC2:(5) = 5V it always displays 0 volts. But when measuring between the J1 pin and for example pin 1 of IC1 it does measure 9 volts that my psu is supplying. Does anyone know what might be the cause of this? Thanks! Quote Link to comment Share on other sites More sharing options...
nuke Posted September 14, 2011 Report Share Posted September 14, 2011 looks like there´s a short between +5V and GND somewhere...check and doublecheck all solderings... ;) Quote Link to comment Share on other sites More sharing options...
Tim B Posted September 14, 2011 Author Report Share Posted September 14, 2011 looks like there´s a short between +5V and GND somewhere...check and doublecheck all solderings... ;) Thanks Nuke! I checked every pin and removed excessive from some points, and you were right. I checked again for shorts, none turned up and I finally got my 5 volts! I'm so glad that it's not a broken part I had to track down or something, haha. Quote Link to comment Share on other sites More sharing options...
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