Tim B Posted September 14, 2011 Report 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
nuke Posted September 14, 2011 Report Posted September 14, 2011 looks like there´s a short between +5V and GND somewhere...check and doublecheck all solderings... ;) Quote
Tim B Posted September 14, 2011 Author Report 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
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