# Fast prototyping

**URL:** <https://lookmumnocomputer.discourse.group/t/fast-prototyping/1349>\
**Category:** DIY STUFF\
**Created:** [June 30, 2020, 8:09pm UTC](https://lookmumnocomputer.discourse.group/t/fast-prototyping/1349 "2020-06-30T20:09:06Z")\
**Posts on this page:** 1\
**Showing post:** 164

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**Author:** ![Sonosus](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/sonosus/32/13679_2.png) [@Sonosus](https://lookmumnocomputer.discourse.group/u/Sonosus)\
**Post date:** [May 24, 2022, 8:39pm UTC](https://lookmumnocomputer.discourse.group/t/fast-prototyping/1349/164 "2022-05-24T20:39:02Z")

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Try tracing around with an audio probe (~1uF non polarised capacitor in series between tip of audio jack and probe, sleeve of audio jack to ground of circuit, plug jack into guitar amp on low volume or cheap PC speakers) near any op amps or ICs near the audio output.

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