Danr posted:I haven’t had the need to take one of these heads apart but, I believe there is more to it than just some LED’s. When activated the clear signal change to stop when the power is removed from stop the signal changes to restricted and has a timer before changing to clear. That logic circuit is in the head and, probably part of the same circuit board. You probably smoked more than an LED or two. I think Chris has the right idea, check eBay as well as some of the forum sponsors.
I don't have one to look at, so if the head has more than LEDs then I stand corrected. I was using the following where someone is selling the signal head, socket for signal head, and a separate control board which suggests the logic circuit (e.g., diagonal to vertical delay timing) is on a separate board and not inside the signal head ... but I must be mis-interpreting.
In any case, if your signal heads are write-offs, before you toss them would you be willing to pry one open and post photos of what they look like?
BTW in above photo the signal heads are $5 if that's a good price? I don't know about shipping.
