So I have a configuration consisting of 3 8-relay boards, with a total of 24 relays. I have a light switch sketch that turns a switch on and off from an Android app.
I can turn on 8 relays at once on 1 relay board, however, when I start turning on relay 9, 10 and so forth on relay board 2, it seems I run out of juice - all the relays turn off without me turning them off. I did a forum search to find a solution but nothing specific to my scenario. I would like to be able to power on all 24 relays at once and assuming I would need an external PS. What can I do to rectify my problem?
I purchased this hoping it would resolve the issue, but the problem still exists when the Arduino is powered with this PS.