So after doing the POC for the Digita Dash Speedo Bargraph I have moved on to different technology.
This uses a much simpler and more versatile technology than the MAX7912 matrix driver used in part1 . this employs WS2812b Addressable LED’s this can control hundreds of LED’s using just 5V,GND and a single data pin.
For the PoC here I used so premade 4×4 modules chained together to give a 4×12 array of LED’s These were aranged in pairs to produce 2 2×12 bargraphs. The other advantage of the WS2812b LED’s is that they are RGB colour mixing so you can make any LED Any colour you like.
The next sterp is to measure up the old dashboard, work out what I want to display and then lay out the full design. My intention is to do it all with hand soldered WS2812b Through Hole LED, with the possible exception of two sets of 7 segment displays for the Rev/Speedo.