I made a bar graph tachometer just like you describe a while back (some people who were at GT Pro that day might remember it) but I got lazy and never installed it National makes a bar graph LED driver, so it's real easy. Just need a divider, some source of power, your LEDs, the driver chips, and you're good to go. I tapped off of the tach (since the 2nd gen. 3kGT SL had an electronic one.)PearlR/T said:Has anyone seen the style of shift lights that they use in most racing like F1 and others? They have a line of LED lights that go from green to yellow to red. I want to know how to make this. What would they get a signal from? Would it be really hard?
Thanks in advance,
Yeah, I was just too lazy before to design a real active integrator This setup works fairly well now, only have about 20mV ripple at worst case.akira410 said:Lawerence,
Did you ever figure out a way to filter out the pulses?