del_boy
Member
- Location
- Herefordshire
This could be why the nano has a restricted number of switchable 0v to 5v pins.as I needed 12 pins @Andy26 advised me on some code altering in the arduino nano which allowed it to add a few extra pins to switch 5vI'd getting a couple of boards in the link I posted above and swap them over. I've made a section control with 8 relays which, although I've not put on the machine yet, works fine on the bench. I think in @Andy26 original post he said you need a separate power supply for higher number of relays.