# FM VCO with Arduino (Hagiwo)

**URL:** <https://lookmumnocomputer.discourse.group/t/fm-vco-with-arduino-hagiwo/3566>\
**Category:** DIY STUFF\
**Created:** [May 28, 2021, 10:01am UTC](https://lookmumnocomputer.discourse.group/t/fm-vco-with-arduino-hagiwo/3566 "2021-05-28T10:01:01Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**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:** [May 29, 2021, 1:22pm UTC](https://lookmumnocomputer.discourse.group/t/fm-vco-with-arduino-hagiwo/3566/6 "2021-05-29T13:22:21Z")

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The magic’s pretty much in the Mozzi library, the code is pretty simple and is just adapted from a Mozzi example. Not to denigrate @HAGIWO’s work!

@fredrik said elsewhere [an MCP6002 ($0.36 at Mouser) should work](https://lookmumnocomputer.discourse.group/t/help-finding-rare-components/3540/4) in place of the NJM2732D ($2.58). It’d be even nicer if something from Tayda would work, but I don’t see any that are rail-to-rail input/output.

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