I have a Huzzah Feather and a 20-pin shift register TPIC6B595N. I am trying to control a multiplexed 4x4 LED matrix which I have soldered appropriately.
I am trying to figure out the proper way to wire everything up so that I don't blow an LED because soldering it was a pain in the butt.
The Huzzah is powered by a microUSB to my laptop.
My first question is how do I wire up the Huzzah and shift register properly to ground? So far, I am just connecting their respective ground pins to the negative row on my breadboard. Normally, with a power supply, I would have a positive end and a negative end but since its powered by microUSB, I'm not sure what to do here.
Second, I've connected the USB power output pin on my Huzzah to the input voltage pin on my shift register.
Third, I've connected four resistors to the outputs of the shift register and then to the positive inputs on the LED matrix.
Fourth, I've connected the negative inputs on the LED matrix to ground, the same row as described in the first step above.
Now here is where I get a little bit lost. My shift register needs a clock, data, and latch. I believe I've located where they are but can't seem to figure out what they correspond to on the Huzzah.
The Huzzah data sheet makes no mention to either of those terms.
If anyone can help me answer my questions, that'd be great. Thank you.
Edit: I added the schematic of my 4x4 LED matrix as well as the resistor on the side but I couldn't figure out how to add a shift register or Huzzah Feather. Also, can someone address my question about ground? Do I just connect it to the negative row on my breadboard?