Proof of life photos - v0.5 of the PCB.
So far the only modification I have had to make is the addition of a separate power 12V to 5V power supply, as the one onboard the arduino was not capable of pushing enough current to drive the relays. (the Nano is supposed to be able to drive about 0.5A and I was only using about 0.37 so theoretically it should have worked)
This version has fairly big buttons (with a nice tactile feel to them) and 20x4 LCD display. Future versions could be quite a bit smaller, but I like having the LCDs to give me feedback on how things are working at this phase of the project.
all assemblies
'set' button depressed
master switch. The cruise is in circuit when 2 relays are energized, so this is my 'fail safe' - turning the switch off de-energizes the relays and the cruise output drops out of the throttle control circuit.
add on power supply ($6 on amazon)