# KOSMO 1222 Tuner VCO Build Series
**URL:** https://lookmumnocomputer.discourse.group/t/kosmo-1222-tuner-vco-build-series/48
**Category:** Videoos
**Created:** [January 19, 2020, 8:30pm UTC](https://lookmumnocomputer.discourse.group/t/kosmo-1222-tuner-vco-build-series/48 "2020-01-19T20:30:32Z")
**Posts on this page:** 8
**Page:** 3
### Author:  [@fluxpavilion](https://lookmumnocomputer.discourse.group/u/fluxpavilion)
#### Post date: [July 9, 2020, 2:56pm UTC](https://lookmumnocomputer.discourse.group/t/kosmo-1222-tuner-vco-build-series/48/41 "2020-07-09T14:56:19Z")
Ah yeah forgot to say, I got it working by using a DC output, I didn’t quite clock that there is such thing as AC or DC in cv signal but it totally makes sense!
---
### Author:  [@evAp0r8](https://lookmumnocomputer.discourse.group/u/evAp0r8)
#### Post date: [October 11, 2020, 4:56pm UTC](https://lookmumnocomputer.discourse.group/t/kosmo-1222-tuner-vco-build-series/48/42 "2020-10-11T16:56:27Z")
For what it’s worth, if you plug a Eurorack power supply into the “Link” connector you only blow up the op-amps, and the AS3340/CEM3340 is unscathed…
…curiously the ardjuino fires up and does it’s thing, but nothing else works. Obvs.
Thought I’d share since I’m sure I’m not the only person to have done this… and for the benefit of the next casualy - just swap out the 072/074 and your’e good to go!
---
### Author:  [@d42kn355](https://lookmumnocomputer.discourse.group/u/d42kn355)
#### Post date: [October 11, 2020, 4:59pm UTC](https://lookmumnocomputer.discourse.group/t/kosmo-1222-tuner-vco-build-series/48/43 "2020-10-11T16:59:35Z")
that falls under
> [@A litany of dumbassery](https://lookmumnocomputer.discourse.group/t/a-litany-of-dumbassery/526):
>
> So I left out a break on a stripboard and nearly fried an op amp, and then applied the wrong voltage to a brand new Arduino and fried its regulator, hi, how’s your weekend going?
🙂
A few of us did the same. lol
---
### Author:  [@evAp0r8](https://lookmumnocomputer.discourse.group/u/evAp0r8)
#### Post date: [October 11, 2020, 5:12pm UTC](https://lookmumnocomputer.discourse.group/t/kosmo-1222-tuner-vco-build-series/48/44 "2020-10-11T17:12:53Z")
I’ve now painted the link connector **bright red** as a “visual aid”… I’d originally put bits of tape over it, but that had fallen off… 😄
---
### Author:  [@devicex](https://lookmumnocomputer.discourse.group/u/devicex)
#### Post date: [October 11, 2020, 5:47pm UTC](https://lookmumnocomputer.discourse.group/t/kosmo-1222-tuner-vco-build-series/48/45 "2020-10-11T17:47:38Z")
not a bad idea , I have noticed the tape on mine is a bit loose . if I had been thinking during the build I would have not put the link socket in . probably won’t use it , it seems to be something specific to Sam’s use .
---
### Author:  [@eric](https://lookmumnocomputer.discourse.group/u/eric)
#### Post date: [October 11, 2020, 5:50pm UTC](https://lookmumnocomputer.discourse.group/t/kosmo-1222-tuner-vco-build-series/48/46 "2020-10-11T17:50:47Z")
Just plug a new IDC socket without any cable into it… no more temptation to use it 🙂
---
### Author:  [@Bitnik](https://lookmumnocomputer.discourse.group/u/Bitnik)
#### Post date: [October 12, 2020, 3:43pm UTC](https://lookmumnocomputer.discourse.group/t/kosmo-1222-tuner-vco-build-series/48/47 "2020-10-12T15:43:39Z")
> [@eric](#):
>
> Just plug a new IDC socket without any cable into it.
Ingenious. Problem solved.
---
### Author:  [@MadWombat](https://lookmumnocomputer.discourse.group/u/MadWombat)
#### Post date: [January 22, 2021, 2:28pm UTC](https://lookmumnocomputer.discourse.group/t/kosmo-1222-tuner-vco-build-series/48/48 "2021-01-22T14:28:47Z")
Good to know. I was going to ask, for a friend obviously…
[Previous page](https://lookmumnocomputer.discourse.group/t/kosmo-1222-tuner-vco-build-series/48.md?page=2)