# Mail Day Thread

**URL:** <https://lookmumnocomputer.discourse.group/t/mail-day-thread/101>\
**Category:** Uncategorized\
**Created:** [January 24, 2020, 7:14pm UTC](https://lookmumnocomputer.discourse.group/t/mail-day-thread/101 "2020-01-24T19:14:46Z")\
**Posts on this page:** 1\
**Showing post:** 2120

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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:** [November 21, 2020, 9:29am UTC](https://lookmumnocomputer.discourse.group/t/mail-day-thread/101/2120 "2020-11-21T09:29:07Z")

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> [@AO Noise Bells ,,,,,,,,,,,,,,,](https://lookmumnocomputer.discourse.group/t/ao-noise-bells/2301):
>
> This is a percussion and drone synth module based on ideas presented in the 2015 Hackaday article “[Logic noise: More CMOS cowbell!](https://hackaday.com/2015/04/10/logic-noise-more-cmos-cowbell/)” by Elliot Williams. (See also [Cmos noise bell](https://lookmumnocomputer.discourse.group/t/cmos-noise-bell/1103) .) The PCB and front panel are Kosmo format but the same circuit could be implemented in Eurorack format, or other ±12V formats, with no changes other than PCB, panel, and jack dimensions. The module consists of two separate sections. One is a 2-oscillator circuit based on the “cowbell” section of the Hacka…

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