Wow. Well, Gary, what I'd like, ultimately, is a little panel, mounted either to the central AC duct or just above the rear view mirror, so that in my lap videos you could see the following:
A) Red light that comes on when brakes are applied, and
B) 2 or 3 green LEDs that indicate throttle on, full throttle, and maybe one step in between, and finally
C) The digital display from the little bicycle speedometer, which is connected to a sensor on one of the wheels, triggered by a magnet.
I'm completely open to any ideas on the best way to accomplish that. Datacam is a product that allows you to add that information directly to a video feed, so it comes up like close captioning on the the tape you record. But it's very expensive ($500-$1500), and includes a lot of bells and whistles that I don't want.
What would you need to have in order to design/program it?