A couple of interesting things in these original design notes: First, on Thomas’ helmet, you can see there were supposed to be a small set of “UV” meter LEDs on the collar. The mechanical collar idea never made it into the final product, so obviously this feature didn’t either, although the circuit and PCBs were fabricated and stuffed.
Funny but true: the ear piece is actually the bottom of a Pepsi can! Kind of obvious when you see it in the raw clay.
On Guy’s helmet, the original plan called for as many as ten colored segments. But practicality won out and we went with eight, since all our pre-designed chaser circuits were 8-bit.
The notes for Guy’s “UV” meter circuit board and other auxiliary light are nearly exact to the final product, including the “kill these” notes on the hidden LEDs.