Is the relay board like THIS ONE??
DISCLAIMER: Mentioned stuff from my own shop... (Where I have my Info!)So: I calculate 2mA as the current from Arduino.
POWER You Can Control:The relays are limited to 10A, right? So POWER 'per relay' is 12V * 10A = 120W so your calculation is not right."
can i safely hook up the eight relays input to a single arduino pin ?