Hi, I'm planning out a big project and just making sure that there's no problems with my choice of input and output devices before I order the parts. I have very minimal experience with arduino so maybe you can catch something I didn't.
I'm on an arduino uno, which is getting input from two load cells via two HX711 amplifiers. If I understand correctly, you could connect two 4 wire load cells to one HX711 amplifier but you would only be able to read the average tension. I need to be able to independently measure each load cell.
For output, I want to write to two OLED displays. Ideally I'd be able to write different things to each display at the same time, but it could also work to write the same thing to each display.
which use i2c. If I am correct, I wouldn't be able to use SPI because I would either run out of suitable pins or my arduino uno wouldn't be fast enough to write to both simultaneously. I read that I2c is slower so I should have a better chance of running 2 screens at the same time. With I2c I should definitely have enough ports available as well.
From my googling I've found that people have had issues with setups similar to mine but I don't really know enough to understand what the problem might be. This thread, for example, is particularly worrying
Anyway if you have any knowledge that could help me, please let me know! Or if you know some better places I can research to figure this out.
If you want to know what the project is, it's a finger strength contest where you have to pull a sliding block towards you while another person tries to pull it the opposite direction. You have to pull the block to your side with a certain amount of force for a certain amount of time to win the game.
Here's a CAD of my current design for it.
It's pretty hard to understand the CAD by just looking at it, here's a version with my MS paint annotations on it.
hahaha it might still not make any sense but that was my attempt.
if you're still completely confused by what the game is, here's a really early version I cadded without the displays and sensors, and reinforcement. It's a lot easier to see what's happening in this.
Anyway thanks for reading!