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modified core for only DIN & DOUT


uclaros
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Hi all!

I've built a modified core to use only with din and dout for switching on an amplifier.

I didn't use connectors for the LCD so I didn't use the trimpots, transistor and resistors for the LCD.

I will not use pots, so I grounded all 8 of the pot pins.

connections are:

pin 1 via R1 to +5

pin 2-5 gnd

pin 6 via R2 to +5v.

pin 7-10 gnd

pin 11 +5

pin 12 gnd

pin 13-14 oscilation circuit

pin 15-17 Not Connected

pin 18 via 10K resistor to +5

pin 19 to DOUT

pin 20 to DIN and via 10K to +5

--

pin 21-22 to din - dout

pin 23-24 Not Connected

pin 25 via 220R to midi out

pin 26 via 1k2 to +5 and to pin 6 of the optocoupler

pin 27-30 Not Connected

pin 31 Gnd

pin 32 +5

pin 33-40 Not Connected

These are the PIC's connections, I'll post a pic as soon as the midibox.org is up again.

My problem is that on a pic with midibox64v2 app loaded, when I press a button on the DIN, I receive infinite random midi data. I also recieve some midi (allways the same) when I unplug the power from the core.

It also seems that the core cannot recieve midi data correctly.

Any Ideas?

I will post pics.

Thanks,

Uclaros

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Hi,

this is where lcd's come in handy  ;) But this is not possible, so here goes;

First i should check if all resistors on the din board are properly soldered/connected; on the din-page it says;

Your MIDIbox will send a lot of random MIDI traffic without these pull-ups, so don't miss them!

Check if you got all the required pull-up/down resistors on your modified core module.

Then if there still is a problem; follow the steps in the "midi-debugging thread".

Hope i haven't been bothering you with things you knew allready, anyways good luck!

marcel

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Thanks for the reply, thus it will not do...

The DIN works fine on my other midibox...

The resistors on the core are the ones I mentioned.

The core's midi out is probably working because the bootsrtap loader sends it's sysex!

But then it seems I cannot upload mios!

I allready regret that I didn't use the LCD pins and circuitry!

...and finally , like 98% of all cases it will be some bad soldering!

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