Electronics > Beginners
Sequential tail lights
rjp:
In australia tail lights are a licensed and regulated component and you will probably get your car ruled unworthy for not using the approved gear from the car shops.
Brumby:
He's not in Australia. He's in the USA - and their regulations about lights are different.
robjodicarter:
Yeah, our regulations are allot different. This is going on an off road vehicle only anyway, not a big fan of giving any cop a reason to give me a ticket at all
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Brumby:
The LM3914, LM3915 and LM3916 ICs each do the sort of job you want - but their sensitivity scale differs (see the video in reply #9). All three have a "mode" option - where you can have a single dot lit (not what you want) or the bar style (which IS what you want). A simple switch can change from one to the other
You could use any of these three for playing around but, as mentioned above, the LM3914 is probably going to be the best choice since it will be easier to get a steady progression.
There is also another alternative which a lot of people would try - and that is a microcontroller board - such as an Arduino Uno. This will require a bit of programming - but don't be at all scared by that ... it is really simple to do something like this light project and there is a lot of expertise available here.
Whether using an LM3814 or an Adruino, the output from these devices will only be enough to light up small LEDs on your breadboard. You will need higher current drivers to run the serious LEDs you will need for bright lights. We can deal with that a little further down the track.
tpowell1830:
--- Quote from: rjp on September 24, 2018, 03:17:31 am ---In australia tail lights are a licensed and regulated component and you will probably get your car ruled unworthy for not using the approved gear from the car shops.
--- End quote ---
Wow, really, your government forces you to buy parts from exclusive shops? I thought Australia had a small government. First your guns, now telling you what you can put on your cars? I am surprised that Crocodile Dundee would let that happen. :palm: :)
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