# Week 8 Update

What was accomplished: 

<figure><img src="https://2353182699-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXgXjz6D0Vz2o0EOp8JO5%2Fuploads%2FXItwzGopC8ZDXlOuYdt5%2F20250315_143052%20(1).jpg?alt=media&#x26;token=044f2613-0159-4951-9e1e-4b10f7553a01" alt=""><figcaption></figcaption></figure>

* assembled stepper motor electronics setup, and updated arduino code so that it would revolve precisely ONCE(should work on the final assembly, since we are using the same stepper motor) WITH a button setup
* re-designed spin coater CAD on onshape
* planned out a roadmap on how to assemble electronics(have a single arduino mega controlling everything, or find a way to "link" smaller microcontrollers together)

<div><figure><img src="https://2353182699-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXgXjz6D0Vz2o0EOp8JO5%2Fuploads%2FsxorgxVUMyCiSWoCvUW1%2FScreenshot%202025-03-16%20223406.png?alt=media&#x26;token=3e07706d-700e-40ba-a372-411a588b240c" alt=""><figcaption></figcaption></figure> <figure><img src="https://2353182699-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXgXjz6D0Vz2o0EOp8JO5%2Fuploads%2Fl7tD5bBCnXHLIzXJAedH%2FScreenshot%202025-03-16%20223317.png?alt=media&#x26;token=466acbf2-08ff-47aa-b240-f8363c509ba0" alt=""><figcaption></figcaption></figure></div>

Roadblocks/issues:

* The cable that needs to be used is micro usb, and there are no cables that I could find that directly connect onto my labtop(only has C cable connections, not sure if there is a micro usb -> usb c cable)
* The stepper motor requires a different voltage from the microcontroller, so either a second power supply is needed for the microcontroller, or a voltage de-regulator(12v to 5v) is required in the electronics setup

TO DOs:

* Once syringe arrives, take measurements of it, before modifying 3d printed parts in previous cad according to those measurements, and begin testing