# 8-Step Arduino Sequencer

**URL:** <https://lookmumnocomputer.discourse.group/t/8-step-arduino-sequencer/467>\
**Category:** KOSMO MODULES\
**Created:** [March 28, 2020, 4:28pm UTC](https://lookmumnocomputer.discourse.group/t/8-step-arduino-sequencer/467 "2020-03-28T16:28:15Z")\
**Posts on this page:** 1\
**Showing post:** 81

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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:** [April 1, 2020, 5:50pm UTC](https://lookmumnocomputer.discourse.group/t/8-step-arduino-sequencer/467/81 "2020-04-01T17:50:04Z")

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Yeah, don’t feed 5V to VIN if you want 5V out, the onboard regulator will shave off ~1.2 V and while the AVR can run at lower voltages it’s only speced at 10 MHz for \<4.5 V (see [here](https://lookmumnocomputer.discourse.group/t/euclidean-rhythm-generator-arduino-based/470/3) and [here](https://lookmumnocomputer.discourse.group/t/euclidean-rhythm-generator-arduino-based/470/6) for a bit more on this). It probably works well enough in practice that you might not notice unless you really need 5 V out and pull out your scope/multimeter, though 🙂

If you should use an external regulator or not depends on your VIN and how much milliamperage you pull from the IO pins; the onboard regulator doesn’t have that much spare capacity, and is harder to replace than a separate one.

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