# Adding standard -12V for a Eurorack formatted synth

**URL:** <https://lookmumnocomputer.discourse.group/t/adding-standard-12v-for-a-eurorack-formatted-synth/3666>\
**Category:** DIY STUFF\
**Created:** [June 20, 2021, 7:34pm UTC](https://lookmumnocomputer.discourse.group/t/adding-standard-12v-for-a-eurorack-formatted-synth/3666 "2021-06-20T19:34:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![amba](https://avatars.discourse-cdn.com/v4/letter/a/13edae/32.png) [@amba](https://lookmumnocomputer.discourse.group/u/amba)\
**Post date:** [June 20, 2021, 7:34pm UTC](https://lookmumnocomputer.discourse.group/t/adding-standard-12v-for-a-eurorack-formatted-synth/3666/1 "2021-06-20T19:34:34Z")

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Hi,  
I am exploring the world of diy gates, triggers, dividers mostly. I am a beginner so really first copying stripboard images then trying to understand it and add a little tests. But I have some tutorials in 5 volts. But currently, closer in +9v-GND, and then closer I have finished circuits with +12-GND but I would like to add the -12. Would I have to start the whole circuit or can I take some elements, pass them into an OP AMP and get the desired voltages?

Thanks in advance!