My MegaDrum32 PCB Pictures

[Synthex]

Here is my new 32 inputs MegaDrum !!!

All in one board 100*160 mm !
True MIDI interface of course !
Atmega32 @ 20 MHz without problem !

Keyboard, LCD, MIDI IN and OUT, USB and 32 inputs work perfectly !!

[Goldie]

Well done, looks great! I like the idea of putting everything on one pcb. I think i'll use yours design, easy to understand x,y coordinates , but you have to post bottom side too . And maybe some details later.

[Synthex]

Here is the bottom side !

It is not really sexy,
but it would make it a true PCB ... anybody ?

[dmitri]

Synthex, you're like an f1 car! How do you do it so quickly on development boards?:)

[Synthex]

Synthex, you're like an f1 car! How do you do it so quickly on development boards?:)

I just love the project

[Goldie]

As far i can see you have 8 pins, 8 resistors, 16 diodes and 1 multiplexer. Is that all you need for 8 channel? If so would this layout work.

analogue1-8.gif

You just have to put 4 of those, one below another.

I'm willing to try to draw PCB, this one i made in illustrator because it exceeds pin number in dip trace. Can you put values on components ,connections would be nice too.

Thanks.

[Goldie]

Is this how you connected your mini analog board, dont mind pins on U1.

synthex3.gif

[Synthex]

Goldie, there is a lack of things on the schematic

I think the best thing to do is to combine maximum inputs on the same connector.

[Synthex]

I see something more like that.

[Goldie]

How about this one? Would i die from electric shock if i connected this way . I am trying to make something like aaron did, only through hole components. All on one board, all conections (jack, midi, usb) facing back and buttons, lcd facing front.

synthex4.gif