# Motherboard

**URL:** https://www.evolver.bio/c/hardware/motherboard/11.md

[Latest](https://www.evolver.bio/latest.md) · [Categories](https://www.evolver.bio/categories.md)

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## [About the Motherboard category](https://www.evolver.bio/t/about-the-motherboard-category/21)

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**Author:** [@bgwong](https://www.evolver.bio/u/bgwong)\
**Replies:** 0

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## [Are there any unused pins on the Arduinos?](https://www.evolver.bio/t/are-there-any-unused-pins-on-the-arduinos/269)

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**Author:** [@Nate\_Borders](https://www.evolver.bio/u/Nate_Borders)\
**Replies:** 1\
**Last updated:** [February 23, 2021, 3:27pm UTC](https://www.evolver.bio/t/are-there-any-unused-pins-on-the-arduinos/269 "2021-02-23T15:27:00Z")

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Continuing the discussion from Purpose of 'Acknowledge' Command: After a bit more finagling, I was able to get my LED to turn off before taking OD and then turn back on after. Success! In a similar way, I want to turn …

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## [Modifying/Adding Experimental Parameters to eVOLVER](https://www.evolver.bio/t/modifying-adding-experimental-parameters-to-evolver/51)

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**Author:** [@bgwong](https://www.evolver.bio/u/bgwong)\
**Replies:** 10\
**Last updated:** [October 21, 2020, 10:15pm UTC](https://www.evolver.bio/t/modifying-adding-experimental-parameters-to-evolver/51 "2020-10-21T22:15:20Z")

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A Frequent Question: If I wanted to include additional inputs/outputs for 16 reactors, would I just need to modify the system with more arduinos, or would I also need to add more Raspberry PIs. If this is possible, do y…