Hi :-)
I'm trying to get a SSR (3-32 VDC) to work with my BOB. The outputs are opto-isolated.
I connect GRD to minus and output 17 to plus of the SSR terminals, but the 5VDC won't turn it on. I have tried to measure the voltage across the SSR and I see that the voltage is below the threshhold value, around 2.7 VDC. When I connect the relay directly to my 5VDC source it works properly. When I measure the on/off state of the output, the voltage is 5.2/0.14 VDC.
I then tried to make it work with a 2N7000 Fetlington. Gate to output 17, Source to minus of SSR and Drain to GRD. The SSR plus-terminal is connected directly to the +5VDC source. Now the SSR is turned on no matter what I do.
Any suggestions what to do or what have I made wrong here?
Thanks,
Brian