Graphite: Custom Graphing calculator

What is this?

This is a custom-made graphing calculator built off of the Rasberry Pi Picos. There are a couple of reasons I chose this board:

1. they're cheap, and easy to get a hold of.
2. if a new one (with the same form factor and compatible pinout) comes out, you can swap it out, giving you a more powerful cpu, more storage, etc.

But Why did you make this?

I made this because this is my first ever PCB and thing like this. Also, I really wanted to fix some things that I found wrong with the TI-84s and such.

Bill of Materials:

PCB components	column_2	column_3	column_4
Name	Buy Website	Price	Notes
2.2" TFT LCD	https://www.adafruit.com/product/1480	$24.95	Just have to use a generic 10 pin thingy 🤷
Rasberry Pi Pico	https://www.adafruit.com/product/4864	$6.00
Buttons	https://www.mouser.com/ProductDetail/Omron-Electronics/B3F-1000?qs=lK7M36XCk6JQHckSc1xIsg%3D%3D	$0.25	(that's for one, gets cheaper the more you buy yay)
male headers	https://www.adafruit.com/product/392	$4.95
10 pin female headers	https://www.sparkfun.com/header-10-pin-female-pth-0-1.html	$0.80
20 pin female headers	https://www.adafruit.com/product/4155	$2.50
	Total	$39.45

---

project images