Hello
I need the arduino to function as a Set/Reset relay (actualy 7 relays, but lets keep it simple for now).
When I activate the Set-command, the feedback must be latched high for "Q", and when Reset-command is activated "Q" will go low and "Q'" will go high
Please see attachment for a sketch
My problem is the device interfacing with the arduino only can send the commands with "220V DC +"
And to read the "Q" state, 220V DC must be applied.
So my question is, how do I downscale the voltage from 220V DC to 5V DC for the commands
And how do I upscale the voltage from 5V to 220V DC for the feedback from the arduino?
I see the SRD-05VDC-SL-C relay is common in projects, but I believe this can only upscale the voltage, and only to 30V DC 10A, though im not anywhere near 10A.