Originally Posted by phmaximus
I'm under the impression they connect to the coil on petrol motors. So I'm thinking for r/c u could connect it to the BEC....
But.... I think I'm wrong. There are some that do run of the coil. So might have to do some more research.
I would've thought they all connect to the coil as well, nice easy switched power and accurate hour readings. Plus powering the hour meter by inductive spark energy sounds over complicated for such a simple thing. Probably just a poor translation or something but the pic of the wiring doesn't show enough to know for sure.
I think the first one would look better on an rc, maybe send them an email and ask for clarification.