DB25 summing PCB - MK2??

[ruffrecords]

Does anyone know where I can get a simple PCB that accepts a PCB mounting DB25 connector and wires it up, to the Tascam standard, to a bunch of summing resistors bringing the result out to a couple of pads or a terminal block. Select switches, mono inputs or pan pots are not needed.  I searched around the group and found various projects but nothing this simple.

Cheers

Ian

 

[dmp]

Holger made this exact PCB. Pics here:
http://www.groupdiy.com/index.php?topic=50088.msg633868#msg633868
I pmd him awhile ago and he said he might do a small run...
I'm interested in a few.

 

[ddt]

Hi Ian,

This might also be of interest: http://www.groupdiy.com/index.php?topic=29082.0

Cheers,
Dan

[edit: Ah, sorry, that's not actually wired according to the Tascam format unfortunately]

 

[Holger]

Holger made this exact PCB. Pics here:
http://www.groupdiy.com/index.php?topic=50088.msg633868#msg633868
I pmd him awhile ago and he said he might do a small run...
I'm interested in a few.

Shame on me... If there are some people interested in this I could do a new run, maybe redesigning it a bit.
We should move this to the BM.

 

[ruffrecords]

Holger made this exact PCB. Pics here:
http://www.groupdiy.com/index.php?topic=50088.msg633868#msg633868
I pmd him awhile ago and he said he might do a small run...
I'm interested in a few.

Shame on me... If there are some people interested in this I could do a new run, maybe redesigning it a bit.
We should move this to the BM.

I would be in for at least 8. By all means take this to the BM

Cheers

Ian

 

[ruffrecords]

Can't seem to find this info anywhere - is the db25 on the back of equipment male or female?

Cheers

Ian

 

[patosandia]

i bought this one
http://www.diyrecordingequipment.com/store/kits/pb8t-passive-summing-kit/

 

[Walrus]

Can't seem to find this info anywhere - is the db25 on the back of equipment male or female?

Cheers

Ian

Normally female.

 

[ruffrecords]

Can't seem to find this info anywhere - is the db25 on the back of equipment male or female?

Cheers

Ian

Normally female.

Many thanks.

Cheers

Ian

 

[ruffrecords]

Holger tells me he has too much work on to spend time on this PCB so.... here is version 1 of my very simple db25 summing PCB. It is 50mm by 60mm and takes a single db25 right angle PCB mounting connector. There's just 16 resistors and four terminal blocks. The idea is you can mount them in a row and just daisy chain them together. I have labelled the buses Odd and Even rather than left and right to reflect the channel numbering of the Tascam pin out.

I shall make a bunch for myself. If anyone else is interested let me know.

Cheers

Ian

 

[Harpo]

Ian, a placeholder for the odd and even shunt resistors might be a nice to have on pcb.

 

[ruffrecords]

Ian, a placeholder for the odd and even shunt resistors might be a nice to have on pcb.

Good thinking. I will add them.

Cheers

Ian

 

[ruffrecords]

Here is the V2 summer PCB layout. I have added positions for the shunt resistors and a 0.1inch pitch SIL as suggested by Holger so it can also be used as a db25 interface card. Lastly I corrected the completely erroneous tracking to the db25 connector.

Cheers

Ian

 

[kpearsall]

was looking for something like this
Would love to pick up a few boards if you make them


Ken

 

[ruffrecords]

was looking for something like this
Would love to pick up a few boards if you make them


Ken

I don't know how many I am going to get made yet. I need five right now so I'll probably get at least ten for myself. I guess the cost is going to be around 5GBP each.

Cheers

Ian

 

[AudioHammer]

I would be in for four pcbs.

 

[Joechris]

I take four as well...

 

[kpearsall]

At Least 4 here

 

[johnnyscotch]

I'll take 4

 

[ruffrecords]

Holger's version of this PCB finally arrived despite postal strikes in both Germany and the UK. As a result I will be making a few tweaks to my design which I will post here before having some made.

Edit: Version three attached. I have made a few small changes after seeing Holger's version - mainly the addition of a ground plane over part of the PCB. Other than that I think that is it. If I don't receive any comments I'll send it out for manufacture at the end of next week.


Cheers

Ian