[SOLVED] SEQ v4 DIN problems / overall progress

[sylwester]

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