sylwester Posted January 12, 2011 Report Posted January 12, 2011 (edited) Hello, I'm just building my own MIDIBox SEQ v4 and have some trouble with the DIN (Digital Input) modules from SmashTV's Shop. The first two modules are working without any trouble, but a 3rd module doesn't work and all other DIN modules also stop working. I've checked for short-circuits, but I couldn't find any. I've also tried terminating the last DIN module + DOUT module with the resistor + capacitor terminator without any success. My wiring looks as following: - Core32 -> DIN(1) J1 outer pins - DIN(2) J2 inner pins -> DIN(3) J1 outer pins - DIN(3) J2 inner pins -> RC-Terminator The two first DIN modules work perfectly - every button press / logical state change is recognized properly. I'm powering the board via a 7.5V adjustable stabilized transformator power supply. This problem was caused by a wrong resistor network in R31. I had a 10K resistor network instead of 5 x 220 Ohm. Now everything is perfect. Thanks, Sylwester This is how the actual "test" looks like: http://midibox.org/forums/index.php?app=gallery&module=user&user=8354&do=view_album&album=81 Edited January 17, 2011 by sylwester
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