That's quite an impressive project. Also take a look at the HD picture quality of the $20 Wyze V3 WiFi Camera that can be powered off the tracks with basically a bridge rectifier, resistor, 5.1V zener (or voltage regulator), and supercap. Picture below. The Wyze is a bit large to fit in an engine unless you can hack the case. It also has a very wide field of view but very good close-up focus. Curious how it would compare to the AIDA camera with ARIES transmitter.
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