i am new in Arduino. I have basic Knwoledge in programming/scripting (understand fast) and also in elektronic stuff.
But know my Plan:
I want to “read” with a reed-sensor my speed of the wheel. Connected to a arduino nano every (more powerfull than nano). If you have an idea for a diffrent nano tell me. The thing is, i dont have much place, so a nano is my first choice.
So the arduino reads the Speed and displays it to 3x RGB 7 Segment Displays from adafruit. I love how they look and they have the perfekt size for my Speedo. Problem: they have 21 pins. I already found one article in the forum about wiring one of these. So i need help if there is an easy way to wire 3 of them. If someboday have designed a backpack i would definitely know
For my Knowledge know: I need 3 74HC595`s to wire one display. Means 9 of them PLUS one to connect the 3 together?? Or isnthere an esier way.
Other option: 3x 5x7 Matrix. But i think thats the same problem.
Here is one wire option i found in the forum for one.
Hope you can help me