I have a Surepet pet food bowl that has an automatic lid that keeps the food covered to keep flies off.
It uses 4x "C" batteries in series which only last a month or so, so want to convert it to external power.
It has 3 illuminated buttons and when it's first turned on they normally light for about 5 seconds then go out and the device will then respond to movement/shadows.
I connected up a bench supply set to 6v, turned the device on and the buttons just stayed lit for about 10sec, went out but it won't respond to triggers or button presses.
So I disconnected the leads from the bench supply and connected up to 4x "C" in a series string just sitting on the bench and the feeder boots and works correctly.
I put a meter in series and it draws around 30mA normally and about 200mA when opening/closing the lid, so nothing the bench supply can't handle.
I've tried multiple non-battery power sources of various voltages between 5-6v but none work, only the batteries will.
I can't understand why it won't work on an external supply?