I'm trying to interface a Ring Doorbell Pro with an electronic chime in my whole-house intercom. The wires coming from the Ring Doorbell (Pro) have an AC voltage across them of 17.1 to 17.2 (bounces between those values on my digital meter), and when the doorbell button is pressed, the voltage drops to 17.0 volts. Is there any reliable way to detect this small voltage drop and then momentarily turn on a relay to pulse the electronic chime in my intercom system? This chime requires just a momentary (fraction of a second) circuit closure on the intercom board -- and these terminals also have an AC voltage (22V) across them, presumably because it's designed to work with the standard 24VAC doorbell transformer.
If at all possible I'd like to do this without the complexity of an MCU. Possible? TIA.
If at all possible I'd like to do this without the complexity of an MCU. Possible? TIA.