My MegaDrum32 PCB Pictures

[Synthex]

Hello,

Here is my version of megadrum32.
I put the analog with the digital part to minimize space.

Thank you for your comments !

[dmitri]

Looks great! Did you test it already?

[dmitri]

Also I don't see ISP headers. How do you write firmware into Atmegas?

[Synthex]

Here is pinouts !!!

[Synthex]

Also I don't see ISP headers. How do you write firmware into Atmegas?

I write firmware into Atmegas with an external programmer.

But, you can add it easily, front of the KBD connector with eight 330 ohms resistors.

[Synthex]

Hello,

Here is the bottom side of megadrum32.

Thank you for your comments !

[dmitri]

Great again! Start testing!:)

[Aaron]

Also I don't see ISP headers. How do you write firmware into Atmegas?

I write firmware into Atmegas with an external programmer.

But, you can add it easily, front of the KBD connector with eight 330 ohms resistors.

if you add the reset pin of the atmega to the keyboard connector then you can use
the 1 connector for both.
then change the resistors on the cable to 570, 570, 570, 680.

[Synthex]

if you add the reset pin of the atmega to the keyboard connector then you can use
the 1 connector for both.
then change the resistors on the cable to 570, 570, 570, 680.

Of course, you don't need to add 330 ohms resistors on board. Just 470 ohms resistors on the ISP cable.

[Aaron]

can u comment on its (MegaDrum's) performance yet?