Hey Electrical Engineerers!
I am currently working on making an LED tail light for an older car.
Overview of the Taillight
Each tail light has 4 inputs connected to it: Park, Brake, Turn, and Reverse.
The 4 inputs are switched 12V. For example, if you engage your turn signal, the turn input will switch 12V on and off each time the blinker or hazard lights are activated. The most current this circuit could draw is ~2.5A.
When I initially created this circuit, I had a regulator on each of the inputs. Soon after, I realized that four regulators was much too expensive. So with that, I created this circuit which aggregates all the power to one buck regulator (LM2596) and uses MOSFET transistors to determine which light should be on.
NOTE: The LEDs for each light are actually an array of LEDs, but I simplified it to just one for this schematic.
- Is this an effective circuit, specifically the one regulator being supplied from multiple sources and the MOSFETs being used to switch on the lights? Is something like this available in an IC?
- I would like to add over-voltage and current protection to this circuit, how could I effectively do that?
Thanks in advance, I really appreciate any feedback.