I am trying to use the Automation Phat to control a lighting fixture (wiki) with an external 10VDC power supply.
The wiring is as follows:
10V psu positive lead ----> positive dimmer contact negative dimmer contact ----> Output 1 on the pHAT 10V psu negative lead ----> GND on the pHAT
is this correct? (I am not that good with electronics)
The problem I am having is that when the output pin is ON, I measure 9.5V at the dimmer’s contacts.
But when the output is OFF, I should get 0v, but I measure around 10.5V.
I measure 10v exactly at the psu’s contacts.
Before that I tried to blink a LED using the output and the 5V pin as described here:
…and it worked perfectly fine.
I am a bit at a loss here, any insight would be appreciated.