Generic Automotive Light Effect PIC/Arduino Modules

These are simple modules I made with a pic 12c508 microcontroller. I use them to create different effects. The Mosfets are capable of some decent curernt with very little heating. I have used these for sequential turn signals, flashing brake lights, alternating flashers, strobe effects for leds, fade in out for a dome light etc etcGeneric Automotive Light Effect PIC Arduino Modules

Step 1: Picking a Mosfet

there are two ways to do this. Use P channel mosfets to switch the power lead or N channel mosfets to switch the ground lead.

I made an 8 channel one for a traffic advisor clone for my truck. I got a bunch of 3rd brake lights from a surplus house for $2 each. I mounted them to a piece of kindorf and used a couple of muffler clamps to hold it to the rollbar. they all share a common ground lead so P-channel mosfets were used. that requires a 2n2222 transistor to pull the gate down. if you tried to hook the gate to the micro directly the mosfets would partially turn on and heat up. the trick is to always run them fully on or off. there will be very little heating.

Step 2: Single Light Controller

this is the simplest one to build. it can be used for a third brake light flasher or sequential flasher for signal lights that have 2 bulbs in a horizontal layout. This is common on the front on many trucks i’ve seen..

Step 3: Double Light Controller

This is the one I use for Mustang/Cougar sequential turn signals and alternating headlight or taillight flashers.Generic Automotive Light Effect PIC Arduino Modules schematich

Step 4: Triple Light Controller

this one is great for those RGB light strips. You can replace the pic micro with an arduino to make it easier to experiment with. just remember to use digital pins d9 d10 and d11 to drive the mosfets. Many of those strips are common Anode style so you need to use the schematic with N-Channel Mosfets….

READ  Book: PIC Microcontrollers



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