Hi Stan
It can get really confusing very fast. The victim for the Knight Rider is a Hotwheels 1:43 scale car. I can not open the hood, I was thinking of putting the led lights under the car in the front. The Chinese waterfall will not fit under the car. See attached photos. From Rtr12 circuit it stated need a 9 volts DC but you say I use 5 VDC I will try it out and see if it works. It make sense to use less wiring with sound engineering.
Hi Kris,
I did try the waterfall in your picture above at 2.2 or 2.3 vdc to 12 vdc and it worked throughout the range. I only tried it for Stan as he mentioned it should work at 5 volts in a post above and also said in an even earlier post that he didn't have one. Just trying to help out there.
I haven't tried other voltages on the other schematics above. To be honest I never even thought to try different voltages with any of them. Stan can tell by looking at the circuit (he knows what he is doing), without having to try it like I would. I can't tell by looking. Trial and error is my method for a lot of these things, unless someone here helps me with it. 
