# My build progress

**URL:** <https://lookmumnocomputer.discourse.group/t/my-build-progress/345>\
**Category:** DIY STUFF\
**Created:** [March 1, 2020, 8:57pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345 "2020-03-01T20:57:53Z")\
**Posts on this page:** 20\
**Page:** 16

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**Author:** ![CTorp](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/ctorp/32/15023_2.png) [@CTorp](https://lookmumnocomputer.discourse.group/u/CTorp)\
**Post date:** [May 13, 2020, 2:18am UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/302 "2020-05-13T02:18:02Z")

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Royal Air Force tag? That’s pretty neat. I got some similar (albeit probably not of quality) “aircraft toggles” from tayda with red leds in the switch.

 ![image](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/6/66f965d2c96381d7f66fce1a30948f6065d15bf5.jpeg)

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**Author:** ![Piecho](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/piecho/32/1782_2.png) [@Piecho](https://lookmumnocomputer.discourse.group/u/Piecho)\
**Post date:** [May 13, 2020, 5:27am UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/303 "2020-05-13T05:27:20Z")

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Dude, the size of it - is it to control jet power in planes? : D

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**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\
**Post date:** [May 13, 2020, 6:41am UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/304 "2020-05-13T06:41:06Z")

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> [@Maxhirez](#):
>
> What are the dimensions of the board you made for the 3340? I have two of those sitting around and I’ve never been able to get so much as a 60hz hum out of the veroboard layout I did for them.

the pcb is 20mm X 175mm for a standard panel 25x200. it’s a two part board with the ( balls just realised a minor mistake) daughter board for the pot… will sort out some images later.

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**Author:** ![Piecho](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/piecho/32/1782_2.png) [@Piecho](https://lookmumnocomputer.discourse.group/u/Piecho)\
**Post date:** [May 13, 2020, 8:21pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/305 "2020-05-13T20:21:51Z")

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After blowing up one capacitor,resoldering 3 times half of the components power supply works stable for +/-12V and +5V. Yay!

So, next are power sockets.I do not have strip board, only this one with holes. I took sire to connect pins, but I have to do this job 3 more times - any protips how I can make it faster?

[![Google Photos](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/2/273a5c488d1faf3fc082bf4e309a4f2a2d60fb2d.jpeg "New photo by Piecho3a") ](https://photos.google.com/share/AF1QipOOMYyQHlN1vRRlkojot_kKuXg1rm_SlZtHyyAkaLsyN2FMd1Gn-y3jUoM6bFC-kA?key=bGtfR1FIYTNCOGxxd1laT0I4QmNjbHlReWxUQ3BR)

[![Google Photos](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/1/1640ce29fce4be9a8a4d3f0f495efc8edc1fa2db.jpeg "New photo by Piecho3a") ](https://photos.google.com/share/AF1QipOf0igtOM1kcTRDSQ1ai52HxDss0cP_3vJsEUG-JJy09TYIdroT074jXKDl0nNP3w?key=VG5PdWxVZE43a3Qwa1JSODVSbXhlM0hqVVRfZVln)

Thin wires are for CV and Gate only - as you mentioned, probably will stay unused.

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**Author:** ![d42kn355](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/d42kn355/32/273_2.png) [@d42kn355](https://lookmumnocomputer.discourse.group/u/d42kn355)\
**Post date:** [May 13, 2020, 9:26pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/306 "2020-05-13T21:26:05Z")

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Not at all bashing on ya friend, but may I suggest some Flux?  
I highly suggest getting something like a Flux Pen or a syringe of Liquid Flux

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**Author:** ![Al4critous](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/al4critous/32/355_2.png) [@Al4critous](https://lookmumnocomputer.discourse.group/u/Al4critous)\
**Post date:** [May 13, 2020, 9:56pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/307 "2020-05-13T21:56:15Z")

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I really think you should buy some veroboard. The strips make your life 100x easier than what you are currently doing.

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**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\
**Post date:** [May 13, 2020, 10:53pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/308 "2020-05-13T22:53:11Z")

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I agree with Al4critous for the stripboard and also the soldering is very important for the conductivity, especially there it is for the power.  
without wanting to be rude some should be redone

 ![types-de-soudure-1](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/7/74c4f4e3ab11f46bebc03391bce02e9477fedb0e.png)

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**Author:** ![Caustic](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/caustic/32/15588_2.png) [@Caustic](https://lookmumnocomputer.discourse.group/u/Caustic)\
**Post date:** [May 13, 2020, 11:48pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/309 "2020-05-13T23:48:32Z")

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It might seem like a pain to redo, but you will not regret doing it.

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**Author:** ![Piecho](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/piecho/32/1782_2.png) [@Piecho](https://lookmumnocomputer.discourse.group/u/Piecho)\
**Post date:** [May 14, 2020, 4:21am UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/310 "2020-05-14T04:21:26Z")

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Thanks all guys!  
It looks worst in pictures due the high contrast, however it is not pretty job at all. I found stripboard in my country so will order today (funny thing, I do not see that any store user particular “strip” or “stripboard” - in English or my language at all what made searching a pain).

I tried to use had rosin and flux for cables that goes into PCB - helped, however, still facing some issues with current solder, cant find proper temperature to work with, now set at 370 Celsius.

Another questions for the cables - I used 24AWG here, but it would be much easier working with strip cable. I have spare SATA cables, are wires from there will be thick enough?

After checking if there is no any shortcuts this will be only prototype board for checking modules for next 4-6days, next go with **proper** stripboard soldering.

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**Author:** ![Caustic](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/caustic/32/15588_2.png) [@Caustic](https://lookmumnocomputer.discourse.group/u/Caustic)\
**Post date:** [May 14, 2020, 5:11am UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/311 "2020-05-14T05:11:17Z")

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Also goes by Veroboard.  
If it helps, this is what i get:

# BIG STRIPBOARD 110X93MM (COPPER)

[https://www.taydaelectronics.com/big-stripboard-110x93mm-copper.html](https://www.taydaelectronics.com/big-stripboard-110x93mm-copper.html)  
 ![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/f/fcce8a8e661b23ff7ca88b14422f69a158dfc0dc.jpeg)

I know i really push tayda a lot, but its for good reason.

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**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\
**Post date:** [May 15, 2020, 8:02pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/312 "2020-05-15T20:02:00Z")

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Soldered this up this afternoon. Now I just need to work up the nerve to test it.

 ![IMG_20200515_155050a](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/c/c6a7311f61eca1382ca19acfc1e2067893f8986f.jpeg)

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**Author:** ![Myleswise](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/myleswise/32/2668_2.png) [@Myleswise](https://lookmumnocomputer.discourse.group/u/Myleswise)\
**Post date:** [May 15, 2020, 9:23pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/313 "2020-05-15T21:23:49Z")

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![20200515_141430](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/3/38b894c8b6593dcea37b44b6f9e7ae64c5b9a5ef.jpeg)  
Just made this Dual VCA circuit adapted from Sam’s schematic to be a little smaller to fit in my Eurorack case… and it works!!! I used Eagle for the first time to build it and it went pretty well. I just got the pots setup backwards but that’s an easy fix… Thanks @lookmumnocomputer for the schematic and inspiration to make projects like this a reality!!!

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**Author:** ![AstralDad](https://avatars.discourse-cdn.com/v4/letter/a/e19b73/32.png) [@AstralDad](https://lookmumnocomputer.discourse.group/u/AstralDad)\
**Post date:** [May 15, 2020, 9:57pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/314 "2020-05-15T21:57:51Z")

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Looks great, nice and clean!

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**Author:** ![devicex](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/devicex/32/28_2.png) [@devicex](https://lookmumnocomputer.discourse.group/u/devicex)\
**Post date:** [May 15, 2020, 11:42pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/315 "2020-05-15T23:42:41Z")

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> [@analogoutput](#):
>
> Now I just need to work up the nerve to test it

yep that can be pretty nerve racking experience sometimes .

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**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\
**Post date:** [May 15, 2020, 11:50pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/316 "2020-05-15T23:50:49Z")

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yes, I have not all the components for my new power supply, and i have 6 or 7 modules finish and ready but not yet tested  
… I hope everything will work the first time 🥶

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**Author:** ![devicex](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/devicex/32/28_2.png) [@devicex](https://lookmumnocomputer.discourse.group/u/devicex)\
**Post date:** [May 15, 2020, 11:53pm UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/317 "2020-05-15T23:53:33Z")

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yeah thats always the hope , to bad it doesn’t work that way . but it does make it special when they do work on the first try .

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**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\
**Post date:** [May 16, 2020, 12:18am UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/318 "2020-05-16T00:18:28Z")

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> [@analogoutput](#):
>
> Soldered this up this afternoon. Now I just need to work up the nerve to test it.

Ooooh. So close. Everything seems to work (aside from a trivial software issue) except… I misconnected the output op amp. I can bypass the op amp and have something that’s sort of usable at least for testing, but I’m gonna have to do another version of the board.

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**Author:** ![fredrik](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/fredrik/32/682_2.png) [@fredrik](https://lookmumnocomputer.discourse.group/u/fredrik)\
**Post date:** [May 16, 2020, 12:35am UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/319 "2020-05-16T00:35:21Z")

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> [@analogoutput](#):
>
> I misconnected the output op amp

As someone once said…

> [I really need to add “verify that opamp topologies make at least some sense” to my PCB design checklist 🙃](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/163)

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**Author:** ![devicex](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/devicex/32/28_2.png) [@devicex](https://lookmumnocomputer.discourse.group/u/devicex)\
**Post date:** [May 16, 2020, 5:34am UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/320 "2020-05-16T05:34:36Z")

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![20200516_0130301](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/d/db47d9068e86f3d1d93651430e09ae4fa3e29a63.jpeg)  
mikro kosmos built and tested 👍

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**Author:** ![ChristianBloch](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/christianbloch/32/56_2.png) [@ChristianBloch](https://lookmumnocomputer.discourse.group/u/ChristianBloch)\
**Post date:** [May 16, 2020, 6:06am UTC](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/321 "2020-05-16T06:06:15Z")

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How did you attach the piezo?

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