Hi there,
I’ve just begin learning robotics and we’ve been using a Photon microcontroller in class. My project needs something with a lot more pins than a Photon. Is there a similar product out there that will do that?
Thank you!
Define ‘a lot more’?
Also, take a look at GPIO expanders, which can give you as many pins as you need on the Photon 
Oh, that’s perfect! Thanks. One more question: with the Photon, you can define pins in the code. I note that the expander doesn’t have numbers on each of the pins. How would I define each pin in the code?
Here’s an expander that does PWM for driving a whole bunch of servos: https://www.adafruit.com/product/815. It’ll do 16 by itself, and it’s chainable, so you can do a lot more if needed.
Adafruit has a tutorial that should be easily adapted to the Photon: https://learn.adafruit.com/16-channel-pwm-servo-driver