Latest MegaDrum schematics. 32 inputs.

[isque]

Thanks both Dmitri & Jman 31,now i c the more.But in this topic's PCB design by Dmitri can be printed?it is stable?

[Firelord]

Thanks both Dmitri & Jman 31,now i c the more.But in this topic's PCB design by Dmitri can be printed?it is stable?

Yes, you can use the provided PDF/KiCad files to print the layout, just make sure that the printed image is not scaled (i.e. it must be a 1:1 print).

[isque]

Thanks both Dmitri & Jman 31,now i c the more.But in this topic's PCB design by Dmitri can be printed?it is stable?

Yes, you can use the provided PDF/KiCad files to print the layout, just make sure that the printed image is not scaled (i.e. it must be a 1:1 print).

Thank you,i will start to rock megadrum soon.

[isque]

Thanks both Dmitri & Jman 31,now i c the more.But in this topic's PCB design by Dmitri can be printed?it is stable?

Yes, you can use the provided PDF/KiCad files to print the layout, just make sure that the printed image is not scaled (i.e. it must be a 1:1 print).

HI,Firelord,I have an other question,How can i know the size of this topic's PCB design by Dmitri.

[Firelord]

HI,Firelord,I have an other question,How can i know the size of this topic's PCB design by Dmitri.

By measuring the board dimensions. Here's what I got:

analog_board_dims.png

digital_board_dims.png

[isque]

Thanks so much,Firelord.

[jplavareda]

Hi all! I have some questions:

1- In case I use 4851 instead of 4051, should i leave the spaces for bat85 empty or should i jumper them?

2- I would like to "DIY" my own megadrum, but i think that 32 inputs are too many for my needs. What should i do if i´m planning to build 16 inputs only?

3- Is this the right atmega chip: http://www.e-farnellnewark.com.br/8bitmicrocontrollericmemorysizee,product,01M6898,1271.aspx

4- Is 6n138n equal to 6n138 ?

5- The pads are made with piezos, right?

Thanks!

[dmitri]

Hi all! I have some questions:

1- In case I use 4851 instead of 4051, should i leave the spaces for bat85 empty or should i jumper them?

Leave empty

2- I would like to "DIY" my own megadrum, but i think that 32 inputs are too many for my needs. What should i do if i´m planning to build 16 inputs only?

Leave out unneeded 4051s and associated diodes/resistors.

3- Is this the right atmega chip: http://www.e-farnellnewark.com.br/8bitmicrocontrollericmemorysizee,product,01M6898,1271.aspx

No, it is rated for 8 MHz max.

4- Is 6n138n equal to 6n138 ?

Yes.

5- The pads are made with piezos, right?

This is a signal reading part of pads.

[jplavareda]

Dmitri, can i use this atmega chip: http://www.e-farnellnewark.com.br/cieeprom40ppdip,product,1455110,1271.aspx

Thanks!

[zaklinacz]

Hi,
I'm not Dmitri, but yes - you can use this ATmega
BR
Michal