DIY blanks

Kafgee · Post by **Kafgee** » Sat Mar 23, 2019 6:42 am

I thought we could start a thread for diy
Modules exchange ideas and simple instructions .
I for instance have made a diy Chirper expansion
following Toms Instructions

T. Jervell · Post by **T. Jervell** » Sat Mar 23, 2019 7:07 am

Cool!

sungja · Post by **sungja** » Sun Mar 24, 2019 10:50 am

Totally forgot about chirper expansion points. Will have to look into this soon. What preamp for the filter input is recommended here? Any link to a schematic would be appreciated.

chrisdermo · Post by **chrisdermo** » Sun Mar 24, 2019 3:17 pm

did one of these threads a while back
viewtopic.php?t=198594

here's a few things I've DIY'd

Some switchable capacitors and diodes, and format jumblers:

4MS RCD (now dead

)

Quick and dirty build of Bill's tiny mixer from this thread
viewtopic.php?t=202957&highlight=[img]h ... 1351_1.png[/img]

I also did a chirper expander, DRM1 expander and rehoused a Stroh Optograte and FSS Convulsion generator. Pics of those around here somewhere...

Kafgee · Post by **Kafgee** » Sun Mar 24, 2019 4:25 pm

Nice one Chris !
Let’s have all of these in one thread

I did not use any preamp on the filter input
Just a 30k resistor like described

I followed the instructions Tom has on the Chirper
Page .

Just click the link where it says pdf instructions

sungja · Post by **sungja** » Mon Mar 25, 2019 7:28 am

So what does the pot for level do? I guess for modular levels it is ok to go straight into the input but i believe Tom recommended a preamp for line levels. Will have do do some experiments someday and see how it works.

phisynth · Post by **phisynth** » Mon Mar 25, 2019 1:49 pm

sungja wrote:So what does the pot for level do?

probably a simple passive attenuator ?

Kafgee · Post by **Kafgee** » Tue Mar 26, 2019 4:45 am

Yes simple attenuation
I might try putting an Opamp/resistor configuration
To try exterior signals and will let you know of the results

sungja · Post by **sungja** » Tue Mar 26, 2019 8:42 am

Did the soldering for expander points yesterday and thought i play around with it some more today. Now the filter mix knob is dead.

What happened?

sungja · Post by **sungja** » Tue Mar 26, 2019 9:51 am

So i managed to short the lp output with the mix knob on the other side of the board.

Kafgee · Post by **Kafgee** » Tue Mar 26, 2019 11:15 am

nice one Sungj[/img]a
What did you think of the result?

I will try to do the mixer tha Chris posted next

sungja · Post by **sungja** » Tue Mar 26, 2019 11:24 am

Well i did not try the expander points just yet. I got a case for it today and i just fired up the chirper for a quick test. If i find some time later today i will try it out but we will see.

Thanks for reminding me about the expansion points.

lud · Post by **lud** » Wed Mar 27, 2019 11:21 am

Has anyone ported any Nonlinear circuits modules to frac? They would be so fun with the Bugs.

soup · Post by **soup** » Wed Mar 27, 2019 11:37 am

lud wrote:Has anyone ported any Nonlinear circuits modules to frac? They would be so fun with the Bugs.

Most of the NLC stuff wants 12v, his sauce of unce can be built to run on 15v...

lud · Post by **lud** » Wed Mar 27, 2019 1:56 pm

Beautiful work! Is that yours soup?

Kafgee · Post by **Kafgee** » Thu Mar 28, 2019 4:37 am

is that diy?

soup · Post by **soup** » Thu Mar 28, 2019 11:20 am

Thanks. It is one of my diy builds, I try to have fun with the designs. It's fairly easy to make your own panels but the new 2fw blanks open up a lot of possibilities as there's quite a few cool diy pcb's that will fit behind a 2 fw panel.

Regarding expanders this was my first frac build, a COFilter<>Octatrack expander...

KNYST · Post by **KNYST** » Fri Mar 29, 2019 2:46 am

Top: Easel Random Voltage Source
Bottom: Fonik Sequential Switch (bi-directional)

Built it in 2013. Seqswitch board is behind the panel and the RVS board is mounted in the case...

soup · Post by **soup** » Fri Mar 29, 2019 3:31 pm

KNYST wrote:Top: Easel Random Voltage Source
Bottom: Fonik Sequential Switch (bi-directional)

Built it in 2013. Seqswitch board is behind the panel and the RVS board is mounted in the case...

That's rad! I made one of those sequential switches too, they're great little modules...

rico loverde · Post by **rico loverde** » Fri Mar 29, 2019 5:51 pm

your panels are great Soup!!!! absolutely love them.

Kafgee · Post by **Kafgee** » Sat Mar 30, 2019 6:20 am

Soup how do you make the panels?
They are great

soup · Post by **soup** » Sat Mar 30, 2019 12:22 pm

The panels are laser cut 3mm acrylic with the engraved bits infilled with paint pen. They run about $10 apiece.

Kafgee · Post by **Kafgee** » Sun Mar 31, 2019 8:06 am

Soup one last q
Where do you draw the panel
Prior to laser cutting?

soup · Post by **soup** » Sun Mar 31, 2019 11:26 am

I design my panels in an ancient, outdated copy of illustrator but any vector graphics program will work fine. Just a simple .eps file is needed to laser cut, one color means cut, another engrave etc. If you want an example here is the file for the sequential switch in ponoko's format (my local laser place)...

Kafgee · Post by **Kafgee** » Tue Apr 02, 2019 5:07 am

Cheers soup

MUFF WIGGLER

MUFF WIGGLER

DIY blanks

DIY blanks