So I am using 8 AA 1.5V batteries that is wired to my 12V 16 channel relay which is wired to my Rpi. I want to be able to control 16 solenoids and use the relay as a switch for the solenoids. As far as my understanding goes the relay channels are "open" when the LED for that channel lights up, which would "trigger" the solenoid, but that's not happening. The solenoid works fine when I connect it straight to the 8AA battery pack and "triggers".
Even when I'm using a voltage regulator( https://fyndiq.se/product/7442400-dc-dc-step-down-omvandlare-med-lm2596/) as an intermediator between the battery pack and the solenoid, the output V is showing 5V and the solenoid is triggering. What should I try next?
16 channel 12V Relay: https://www.amazon.com/dp/B0057OC66U?ref_=pe_2640190_290165290_E_304_dt_1