Hello all. My question here is to use a custom array of momentary push buttons to toggle on and off respective relays and report back to an attached I2c LCD display.
My array of buttons need to be no less than 12 and same for the relays. The relays I need to use have a 12vdc coil in them, so I know that the arduino cannot handle that on its own, so I know I will need something like a ULN2003 or simular to drive them. The arduino of choice here is a NANO. I have already managed to get the I2c display working with a test sketch.
Before it is asked, no I'm not using one of those membrane button matrix pads. I will be making the button array from scratch and all the rest of the electronics from scratch. No break out boards here except the I2c backpack for the lcd... any input would be appreciated.