[my midibox 64]

I use it as a live toy to combine drum patterns and mix them.

The black knobs are to equalize with kill switches.

[my midibox 64]

Here you can see my midibox project. A 3 oktave Acarde Push Button Style controller with mixer section.

It took me about 2 month to build it. Thanks for this great project that makes it possible for me to build that thing.

[button - led help]

Is it possible to split this over two regions.

So maybe shift register 0 and 1 change leds by button press

and separately from this shift register 2 and 3?

How to change the code for that?

[Modwheel 10k problem]

ok I made it.

Pin 2 and 4 to ground

Pin 7 to 5 Volt

Pin 3 is the signal from pot

Pin 6 is the amplified signal to ainx module

to get a doepfer modwheel work full range you need

R1 10k

R2 22k

thanks for you're help.

[Modwheel 10k problem]

Another question. With this formula V = 1 + R2 / R1

I get the resistor values. So in my case I need V=3,125.

I tried it with R2 22k and R1 10k and it doesn't work.

Are these resistors to high?

[Modwheel 10k problem]

so I got some mc1458P to do it. This thing has 8 connectors

1 1out

2 1in-

3 1in+

4 Vcc-

5 2in+

6 2in-

7 2out

8 VCC+

Is it right that this thing don't need a own power supplie? (vss+ & vss-)

So I connect pin 2 to ground (with the 2 resistors)

the outcoming voltage from pot to pin 3

and pin 1 to ain module

[Modwheel 10k problem]

Thanks for you're help, I think the best solution would be going with a rail-to-rail opamp. But I'm a dummy when it comes to electricity.

Do anyone have a shematic for such a thing?

[Modwheel 10k problem]

Hi, if got some modwheels on my midibox which are only using 40% of a 10k pot.

so I got a very limited range of value. Some say use a 30k pot to increase the value,

but I havent seen any to buy. Some say there is a solution by modifying the MIDIBox ASM file.

Whats the way to go? Anyone already solved this issue?

[Help needed dout]

It works! After trying two differnt psu which were dc with over 500mA ,I tried a ac psu and it works now.

thanks for your patience. But why it works now, I dont know.

[Help needed dout]

The voltage at J1-2 is about 7,6Volt.

If I try to press more then one button together the midibox reset.

It must be some voltage problem without pic and all leds burning

the Voltage at dout module is only 4 Volt.

[Help needed dout]

Ahhrrgg, on either way it dont work. 10 times or more turning on, all is fine.

next time turning on all leds or only a some are burning but midibox dont start.

The voltage on J8 Vd is too low. I proved all soldering an see no problem.

Why is the starting prodcedure randomized?

[Help needed dout]

Looks like you were right. Thanks a lot.

[Help needed dout]

Yes, J8 Vd 3.8 Volt, and then with putting finger 5 Volt.

And sometimes midibox do start, sometimes not, wihout any schematic.

[Help needed dout]

There are only 3.85 Volt on the line to dout module and if I touch the rc/sc line it goes up to 5 Volt.

Mysterious.

[Help needed dout]

After turning mad,could the problem be that I have not grounded the case?

Now with ground it seems to work.

EDIT: No it has nothing to do with grounding I ve to search again.

[Help needed dout]

Hi Thorsten,

There are 2 dout modules connected to 60 Leds.

The longest cables to the Leds are about 50 cm.

Is that maybe to long?

[Help needed dout]

Hello, this is my first midibox project and I have a problem with the dout module.

My mb64 start sometimes , sometimes not. If I put my finger on the sc/rc input of the dout

module the box get started. I tested all buttons and all leds, they are working. Do I have to drill

a hole in my midibox to get it started by putting my finger on the rc/sc line???