This mission for knowledge came after a buddy suggested I get a timer for my water heater, and said I couldn't get one for under a hundred bucks.
My goal is to come up with the most inexpensive device, that will activate the water heater on a schedule, and record it's power consumption.
Arduino Board - Not sure which one to get. Cheapest one that'll do the job for now. I read I could program a chip using an arduino board, and use that for an even cheaper version.
220Vac - 12VDC 1A transformer = $3.40
220VAC 40A DPDT Relay = $6.80
ACS712 Module Current Sensor 220Vac 30A = $6.99
LCD Display with keypad = $3.48
$20.67 without the board, just on a quick part/price search.
Am I on the right track as far as the parts I'd need?
Any guidance would be greatly appreciated.