Deckards Dream General Build Thread

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c0ntr4d1ct10n
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Re: Deckards Dream General Build Thread

Post by c0ntr4d1ct10n » Mon May 18, 2020 4:06 am

For anyone starting out collecting parts, I found this amazing gamechanger of a site: https://octopart.com/

All you have to do is copy and paste the mouser bom codes and it automatically compares the exact parts in all of the different sites and displays all the price breaks as well. I found that a lot of parts from Arrow are half the price of Mouser (these are the exact same parts, same manufacturers codes).

So far, I've managed to keep my component bom under $600USD including delivery. The main costs seem to be in the 3340 and 2164 chips, which you can only get at a select few places (and Thonk seems to have the lowest price).

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search64
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Re: Deckards Dream General Build Thread

Post by search64 » Mon May 18, 2020 4:29 am

c0ntr4d1ct10n wrote:
Mon May 18, 2020 4:00 am
search64 wrote:
Mon May 18, 2020 2:18 am
Are there any mirrors for the V1 build docs, BOM and firmware? The links in OP are all dead.
Have you tried this site: https://www.dsl-man.de/display/DDRM/DDRM+rev.1+guide
Obviously not :hihi: thanks!

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search64
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Re: Deckards Dream General Build Thread

Post by search64 » Fri May 29, 2020 3:19 am

Well well well, looks like I'll be building not 1, but 2 of these soon. In my search for a kit, found someone who wants me to build this for him. What have I gotten myself into? :?

So yeah, 16 voice cards to do. How would you guys go about that? One at a time, or everything at the same time doing one value component a time on all 16 boards?

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Re: Deckards Dream General Build Thread

Post by JanneI » Fri May 29, 2020 3:33 am

search64 wrote:
Fri May 29, 2020 3:19 am
So yeah, 16 voice cards to do. How would you guys go about that? One at a time, or everything at the same time doing one value component a time on all 16 boards?
All 16 at the same time if you have a way to mount all the boards because you don't want to troubleshoot 16 differently problematic voice cards, which could be the case when building them one by one. Also, I would place ALL the resistors before soldering anything and do a visual inspection at the end. After that, solder them. If you don't have convenient professional level PCB holders, you could solder one leg on the top side (component side), like "all north and west -side resistor legs", turn them upside down and solder the rest. Just pay attention that you don't resolder the only soldered leg and loose the component.

Have fun, it'll take approximately 5 workdays to complete!

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search64
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Re: Deckards Dream General Build Thread

Post by search64 » Fri May 29, 2020 4:29 am

I might print some sort of rig to hold the boards, I have a 3d printer now.

Thanks for the tips!

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Re: Deckards Dream General Build Thread

Post by sduck » Sat May 30, 2020 9:41 pm

For the resistors I would do them in batches, maybe 1/3 of them at a time, and do 3 boards at once. No fancy jigs here. I bend the resistor leads, insert them, and bend the leads on the back (45 degrees approximately) to hold them in place as I go. Then once you get a lot of them in, solder, clip leads, wash, repeat. You can work through them pretty fast and accurately this way. Maybe not as fast as the jig methods, but it's not a race, right?
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JanneI
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Re: Deckards Dream General Build Thread

Post by JanneI » Sun May 31, 2020 2:24 am

sduck wrote:
Sat May 30, 2020 9:41 pm
Maybe not as fast as the jig methods, but it's not a race, right?
Sure, there are many ways to do them. My only point with doing them all at once is that it's easier to notice the possible mistakes. No need for troubleshooting afterwards. And for mounting the PCB you can also use those two mounting holes.

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search64
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Re: Deckards Dream General Build Thread

Post by search64 » Sun May 31, 2020 8:03 am

I might have access to a professional reflow oven for the million smd caps on the 16 voice boards. Are there gerbers to be found anywhere to make a custom stencil, or am I out of luck there?

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Re: Deckards Dream General Build Thread

Post by JanneI » Sun May 31, 2020 10:00 am

search64 wrote:
Sun May 31, 2020 8:03 am
I might have access to a professional reflow oven for the million smd caps on the 16 voice boards. Are there gerbers to be found anywhere to make a custom stencil, or am I out of luck there?
No, there's no gerbers.

c0ntr4d1ct10n
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Re: Deckards Dream General Build Thread

Post by c0ntr4d1ct10n » Tue Jun 02, 2020 6:49 am

Does anyone know if Coolaudio still have a minimum spend of $2000 to buy direct from them? I can't find the policy anywhere on their website. I tried to email them but they haven't replied. I was thinking of buying 110 bulk of the v2164s at $1.60 each for a group buy but if its $2000 minimum, then I will have to go with the Thonk ones.

[edit] ok this is really bizarre, they literally emailed me back right when I clicked send on this post. :woah:
Their minimum order is $500 (which includes shipping and handling). Looks like it will have to be from Thonk.

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search64
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Re: Deckards Dream General Build Thread

Post by search64 » Tue Jun 23, 2020 8:00 am

Just got my DDRM from Synthcube, and just checking but this trace cut isn't supposed to be here right?

Image

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boops
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Re: Deckards Dream General Build Thread

Post by boops » Tue Jun 23, 2020 8:11 am

Outch,not nice,but an easy fix.
FS :custom buchla 203 style càbinet ,skiff new design,boat ,hardware for diy cabinet ,easel case ,new 1u to 10u to 56u and more. / New 208 buchla card 12 /
HQ small case buchla psu PCB
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Re: Deckards Dream General Build Thread

Post by Pando » Tue Jun 23, 2020 2:44 pm

JanneI wrote:
Fri May 29, 2020 3:33 am
If you don't have convenient professional level PCB holders, you could solder one leg on the top side (component side), like "all north and west -side resistor legs", turn them upside down and solder the rest.
search64 wrote:
Fri May 29, 2020 4:29 am
I might print some sort of rig to hold the boards, I have a 3d printer now.

Thanks for the tips!
I used two 2" nails thru the bottom holes to hold the boards at an angle. It's very easy to stuff the boards that way. Then use another unused board (or a stiff cardboard) to cover the front, turn it upside down, and solder. Stuff the lowest profile components first (Diodes > Resistors > CerCaps > IC Sockets > Transistors > ElectroCaps, etc.) About the top vs bottom solder techniques -- it's much harder to clean the boards when soldered from the top. Also, leave the leads straight, as bending the leads makes it more difficult to remove the component if you need to.

Image

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sduck
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Re: Deckards Dream General Build Thread

Post by sduck » Tue Jun 23, 2020 4:28 pm

I always just fold the leads on the back to hold the components in place. No need for a jig. No problems removing parts if you need to.
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synthnl
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Re: Deckards Dream General Build Thread

Post by synthnl » Wed Jun 24, 2020 2:32 am

I almost completed all the boards. I have difficulty determining how everything has to be put together mechanically. Is there a build document of that somewhere as well? And I guess I should test individual boards first? Is there a procedure for that?

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LED-man
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Re: Deckards Dream General Build Thread

Post by LED-man » Wed Jun 24, 2020 7:02 am

Use a bench powersupply with current limiter and test without a voicecard, then flash the device and start testing with voice1.
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Re: Deckards Dream General Build Thread

Post by roglok » Wed Jun 24, 2020 7:26 am

Hello Wigglers, I just restored and cleaned up the original photo build manual for V1 from an archive.org backup. Maybe it's useful to some of you:

https://we.tl/t-I4vDUjc8DB

(hold time one week)

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Re: Deckards Dream General Build Thread

Post by synthnl » Wed Jun 24, 2020 8:03 am

LED-man wrote:
Wed Jun 24, 2020 7:02 am
Use a bench powersupply with current limiter and test without a voicecard, then flash the device and start testing with voice1.
Thank you that is a good tip and I happen to have one lying around :)

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Re: Deckards Dream General Build Thread

Post by synthnl » Wed Jun 24, 2020 8:04 am

roglok wrote:
Wed Jun 24, 2020 7:26 am
Hello Wigglers, I just restored and cleaned up the original photo build manual for V1 from an archive.org backup. Maybe it's useful to some of you:

https://we.tl/t-I4vDUjc8DB

(hold time one week)
That is perfect. Thank you! Exactly what I was looking for,

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search64
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Re: Deckards Dream General Build Thread

Post by search64 » Mon Jun 29, 2020 8:36 am

Should I glue the plastic screen protector to the front plate? How's that work?

I just see in the build guide I should snip one the pins on a midi port, is that correct?

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Re: Deckards Dream General Build Thread

Post by sduck » Mon Jun 29, 2020 12:08 pm

search64 wrote:
Mon Jun 29, 2020 8:36 am
Should I glue the plastic screen protector to the front plate? How's that work?
I used superglue. Be very careful, it's easy to use too much. (A ummmm.... friend had that problem)
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search64
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Re: Deckards Dream General Build Thread

Post by search64 » Mon Jun 29, 2020 3:12 pm

Alright fingers crossed I won’t get a big old fingerprint on there...

Image

Look here though, do I snip that pin?
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search64
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Re: Deckards Dream General Build Thread

Post by search64 » Thu Jul 02, 2020 5:47 am

Does anyone know what the screen protector is made of, the type of plastic?

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