2017 Jul 10, 03:04 PM
Sounds like you have everything connected properly.
Since the relays are turning on it seems that they are getting enough power. It is more likely that the Pi may not be getting enough power to keep the voltage high and keep the relays off. It may be an intermittent voltage drop from the Pi if it is getting marginal power.
Is there any possibility that your power distribution board is providing a path between the power sources such as a common ground?
Since the relays are turning on it seems that they are getting enough power. It is more likely that the Pi may not be getting enough power to keep the voltage high and keep the relays off. It may be an intermittent voltage drop from the Pi if it is getting marginal power.
Is there any possibility that your power distribution board is providing a path between the power sources such as a common ground?