justin3am's ARP 1601 clone build

...and how to do so...
User avatar
justin3am
KVRAF
10984 posts since 7 May, 2006 from Southern California

Post Sat Feb 29, 2020 1:57 am

While I eagerly await my Karp 2600, I decided I would like to pair it with a 1601 sequencer. I learned about this project on the muffwigler forum (Arp 1601 Sequencer clone and was excited to find that Synthcube sells PCB's front panels, parts kits and enclosures. https://synthcube.com/cart/1601-sequencer-diy

I found some additional information, including links to the service manual for calibration and a build guide, here: https://www.dsl-man.de/display/TTSHADDONS/Arp1601

The kit from synthcube also includes a simple clock divider: https://github.com/foxacid/1601-addons

The kit was very easy to assemble, it took about 12 hours total and the mechanical assembly was pretty straight forward. That said, the documentation for the build is a bit scattered. For example, I couldn't find the bom pdf for the rev 5 board on the synthcube site. I eventually found the links in a post in the build thread. Luckily most of the baggies which contained the components, listed their part numbers. I didn't see a wiring diagram, but the connections are pretty simple.

When i opened the package from Synthcube, I was surprised to find that the circuit board is practically the size of a skate board. :lol:
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I got one of these tools for bending component legs with something I assembled recently. Comes in handy when building projects with lots of diodes and resistors (this project has more than 200 resistors!).
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Three SOIC packages are the only SMT parts on this board. The rest of the parts are thru-hole.
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All resistors and sockets done.
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Caps.
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Voltage regulator.
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Trimmers.
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Faders, jacks and push-button switches.
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The included switches don't fit in this version of the circuit board. I followed the suggestion of someone on the MW forum, and simply twisted the top and bottom leads, 90 degrees.
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The 1/4" foot switch jack didn't fit in either of the pre-drilled holes, so I widened one of them a bit.
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Finally, I assembled the clock divider. This is mostly surface mount parts.
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All done!
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User avatar
BertKoor
KVRAF
11851 posts since 8 Mar, 2005 from Utrecht, Holland

Re: justin3am's ARP 1601 clone build

Post Sat Feb 29, 2020 3:31 pm

justin3am wrote: All done!
:party:
We are the KVR collective. Resistance is futile. You will be assimilated. Image
My MusicCalc is back online!!

User avatar
Forgotten
KVRAF
11472 posts since 15 Apr, 2019 from Nowhere

Re: justin3am's ARP 1601 clone build

Post Sat Feb 29, 2020 5:14 pm

Very cool, and love the build pics!

V0RT3X
KVRAF
8291 posts since 4 Jul, 2012 from Alesia

Re: justin3am's ARP 1601 clone build

Post Sat Feb 29, 2020 5:58 pm

Wicked !~
:borg:

User avatar
justin3am
KVRAF
10984 posts since 7 May, 2006 from Southern California

Re: justin3am's ARP 1601 clone build

Post Sat Feb 29, 2020 9:24 pm

Thanks! It takes a little longer to finish a build when I take pictures along the way but somehow, I'm less likely to make dumb mistakes when I do so. I still made a dumb mistake this time but I caught it before letting any magic smoke out. :lol:

User avatar
vurt
addled muppet weed
65518 posts since 26 Jan, 2003 from through the looking glass

Re: justin3am's ARP 1601 clone build

Post Tue Mar 03, 2020 8:18 am

thats a lovely piece of work 8)

User avatar
justin3am
KVRAF
10984 posts since 7 May, 2006 from Southern California

Re: justin3am's ARP 1601 clone build

Post Tue Mar 03, 2020 1:39 pm

Thanks! I'm really happy with the way it came out. I managed to keep myself from scuffing up the front panel.
I used it to sequence my Minibrute 2 and 0-Coast over the weekend and had a lot of fun. Though it seems pretty simple on the surface, it's very well thought out. I'll definitely be putting some videos together once I have the time.

Goseba
KVRAF
1965 posts since 13 Jun, 2004 from Back in the UK

Re: justin3am's ARP 1601 clone build

Post Tue Mar 03, 2020 1:48 pm

Nice looking build there.
Some of my music Soundcloud Goseba

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