I am considering getting a Nest Hello doorbell. The requirements state:
Nest Hello needs to be powered by wires delivering 16 - 24 V AC, and at least 10 VA (in North America)
The one on the left (with red, green, yellow wires) is a 16V-10VA transformer. The one on the right (with black and white wires) is 10V-5VA.
As far as I suspect (and I haven't confirmed yet), the right one is the one that is likely used for the doorbell. So obviously using that with Nest Hello won't work.
My question: do I need to get a new transformer to replace the existing 10V-5VA, or can I just move the black and white wires over onto the left transformer?