I have a controller that has an unusual digital I/O. When using its digital output - the drive current is only 220 uA @ 2.7 Vdc (yes micro amps), the output high state is 3.3Vdc no load and low state is <0.9 Vdc for each channel. I cannot find a SSR that will work with such a low drive current. Ultimately I want to control several 12 Vdc solenoids that need approximately 60mA each.
I do have a circuit diagram attached (power switching without relay) that I used on another system where the drive current was 1.5 mA @ 4.5Vdc, the output high was 5 Vdc and low was 0 Vdc. Can the initial resister value be lowered (substantially) to make it work for the lower drive current? Is there a SSR available that will work with such low drive current and output high?
I am not an electronics guy but can put most anything together with proper guidance. Thanks in advance for any assistance offered.
I do have a circuit diagram attached (power switching without relay) that I used on another system where the drive current was 1.5 mA @ 4.5Vdc, the output high was 5 Vdc and low was 0 Vdc. Can the initial resister value be lowered (substantially) to make it work for the lower drive current? Is there a SSR available that will work with such low drive current and output high?
I am not an electronics guy but can put most anything together with proper guidance. Thanks in advance for any assistance offered.