I was recently asked how to connect a Arduino to a car lighting circuit to control some LED strips. As there are a number of ways to do that, I thought I'd go through some of my ideas here. This video is a bit more technical and less flashy than the last few, so if that's not you're thing you can skip this one!

GitHub page for schematics and code: https://github.com/smarley/CarLights
Falstad circuit simulator: https://www.falstad.com/circuit/circu...
More details on optocouplers: https://learnaboutelectronics.org/Se...

If you've found this useful and you'd like to support me to create more stuff, you can now buy me a coffee: https://www.buymeacoffee.com/scottmar... or buy something from Amazon UK or US at the links below. As an Amazon Associate I earn from qualifying purchases from the links below. It doesn't cost you any more and it helps me to keep making videos!

Amazon UK
3 Pack or Arduino nano: https://amzn.to/2OWmvJR

Amazon US
3 Pack or Arduino nano: https://amzn.to/3sppDvw

00:00​ Intro
01:30 Potential divider
03:14 Zener diode
04:37 Schottky diode
05:22 Optocoupler
07:19 Final schematic
08:35 Hardware build
09:31 Testing