# CVT voltage converter module **URL:** \ **Category:** KOSMO MODULES\ **Created:** [February 28, 2024, 11:27pm UTC](https://lookmumnocomputer.discourse.group/t/cvt-voltage-converter-module/7036 "2024-02-28T23:27:27Z")\ **Posts on this page:** 6\ **Page:** 1
**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:** [February 28, 2024, 11:27pm UTC](https://lookmumnocomputer.discourse.group/t/cvt-voltage-converter-module/7036/1 "2024-02-28T23:27:27Z")
This is a rather unsexy but useful little utility module. ![cvt](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/e/f/ef21ba3d2d63645d6ecaa301296a9a433012e0c1.jpeg) It converts signals from one voltage range to another. For example, suppose you want to modulate a VCA with a 0 to 5 V low frequency waveform, but your LFO puts out ±5 V signals. You can plug the LFO into `IN`, set the `IN` toggle switch to `±5 V`, set the `OUT` toggle switch to `0–5 V`, and patch `OUT` to the VCA. The waveform will be scaled and shifted into the desired voltage range. Signals in any of three ranges — 0–10 V, 0–5 V, or ±5 V — can be converted to any other one of the three (or to itself, for that matter). It’s primarily intended for control voltages but it can convert audio signals too. Input impedance is 1M and output resistors are in-loop, so 0–10 V or ±5 V signals that are 1V/oct can safely be converted to the other (or itself). Repository for schematics, PCB and panel design files, and Gerbers: [Richard Holmes / CVT · GitLab](https://gitlab.com/rsholmes/cvt) It’s called CVT because there wasn’t enough room for “CONVERT” on the panel, and because I found out you can’t upload a Gerber archive with “convert” in the filename to JLCPCB. ---
**Author:** ![K.ostas](https://avatars.discourse-cdn.com/v4/letter/k/ed655f/32.png) [@K.ostas](https://lookmumnocomputer.discourse.group/u/K.ostas)\ **Post date:** [February 29, 2024, 4:46pm UTC](https://lookmumnocomputer.discourse.group/t/cvt-voltage-converter-module/7036/2 "2024-02-29T16:46:38Z")
Very useful, thanks! I guess I can use TL431 instead of LM4040 and another dual op amp (e.g. RC4558, LM358) in place of TL072? ---
**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:** [February 29, 2024, 4:50pm UTC](https://lookmumnocomputer.discourse.group/t/cvt-voltage-converter-module/7036/3 "2024-02-29T16:50:05Z")
Can’t think of any reason why not! ---
**Author:** ![Soundbrigade](https://avatars.discourse-cdn.com/v4/letter/s/4af34b/32.png) [@Soundbrigade](https://lookmumnocomputer.discourse.group/u/Soundbrigade)\ **Post date:** [March 2, 2024, 1:38pm UTC](https://lookmumnocomputer.discourse.group/t/cvt-voltage-converter-module/7036/4 "2024-03-02T13:38:46Z")
I recently bought a LM4040 thinking of making some kind of voltage reference for setting up VCOs and VCFs, but I think this is where it will go. Thanks for sharing! ---
**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:** [March 2, 2024, 2:40pm UTC](https://lookmumnocomputer.discourse.group/t/cvt-voltage-converter-module/7036/5 "2024-03-02T14:40:28Z")
I’ll soon be posting another module that uses an LM4040. Buy lots! 😆 ---
**Author:** ![Soundbrigade](https://avatars.discourse-cdn.com/v4/letter/s/4af34b/32.png) [@Soundbrigade](https://lookmumnocomputer.discourse.group/u/Soundbrigade)\ **Post date:** [March 2, 2024, 3:25pm UTC](https://lookmumnocomputer.discourse.group/t/cvt-voltage-converter-module/7036/6 "2024-03-02T15:25:48Z")
No need to. I got a 28-pin IC marked i4040. It must contain several of those voltage references … I think I should have a LM4040 @ 2.5V lying around somewhere.