I have an 8 relay 5volt relay board, (compatable with Arduino) which I want to drive from my EZBv4. I have made a script to run the ports D8 and D9 on and off for testing. The problem I have is the relay turns on but fails to turn off. I am using an ezb regulator to power the relay board. I thought I power draw might be too high so I changed to a two relay board of the same spec. I have the same problem with this board.
I see some other people have similar issues driving relays from their ezb's.
Any suggestions? I never felt a full answer to the problem was made. I hoped additional hardware wasn't needed. I am beginning to consider building a transistor switching circuit to go between the ezb and the relay, but felt I shouldn't need it. I also considered using an Arduino?
I always thought a relay should be able to be driven direct from the ezb as described in the digital port spec..
Can anyone help.