PCB DESIGN - All In One v2.5 - 32 inputs with 74HC4851

[gastric]

FYI - Since I've seen more and more people referencing building a V2.5 kit based on my Mouser.com list I updated the Mouser.com order list today to break out components for the JACKS board, ISCP programming cables, some other updated components, and more project notes such as URLs to relevant schematics/posts. Keep in mind I have not yet build a successful V2.5 board (it's constructed, just not functional yet) so I make no guarantees the list is complete, accurate, and will result in a perfectly work board. But it should. Here's a direct link to the post with the ZIP file containing both an Excel and HTML version of the order list: viewtopic.php?p=3960#p3960

Note it does not include things you will need such as solder, soldering iron, method to print the PCB images, and a multimeter you WILL need to test the board every step of the way.

[hartl0602]

i know that some have posted pdf's for this board, but seeing as i had slight issues with the measurements i created my own and thought that i would post for the good of the project.

[Synthex]

Thank you for these PDF files !

[japi]

Thankssss for the pdf
Hope it makes life easier for new builders

[jman 31]

i know that some have posted pdf's for this board, but seeing as i had slight issues with the measurements i created my own and thought that i would post for the good of the project.

Does anyone have the outside dimensions of the jack boards? I don't have the components yet and I want to make sure I etch these to the proper size. Looks like mine came out 200mm x 45mm.

Thanks
Jman

[Synthex]

The PDF file in this topic is in good scale :
http://www.megadrum.info/forums/viewtopic.php?f=3&t=462

[jman 31]

The PDF file in this topic is in good scale :
http://www.megadrum.info/forums/viewtopic.php?f=3&t=462

Thanks man!

[jman 31]

Synthex, can I replace the 6K2 resistor with a 6k8 or a 5K6? I don't have any 6K2's handy and I don't want to order 1 resistor if I don't have to.

Thanks in advance
Jman

[Synthex]

Synthex, can I replace the 6K2 resistor with a 6k8 or a 5K6? I don't have any 6K2's handy and I don't want to order 1 resistor if I don't have to.

Thanks in advance
Jman

It will make gain level change slightly more narrow.
It is preferable to use a 6K2 resistor.

You can put two resistors in parallel or in series for a good value.
For example : a 6K8 with a 5K6 in parallel, a 4K7 and a 1K5 in series, ...

[jman 31]

Synthex, can I replace the 6K2 resistor with a 6k8 or a 5K6? I don't have any 6K2's handy and I don't want to order 1 resistor if I don't have to.

Thanks in advance
Jman

It will make gain level change slightly more narrow.
It is preferable to use a 6K2 resistor.

You can put two resistors in parallel or in series for a good value.
For example : a 6K8 with a 5K6 in parallel, a 4K7 and a 1K5 in series, ...

OK Synthex, thanks for the info and the quick response. I will stick with the 6K2.