Hello everyone, I am new to this forum and before I start I would like to just say a little about myself. I have been an electrician for almost 8 years now, so schematics, diagrams, electronic components, etc, etc, are not foreign to me, what is foreign to me, however, is the arduino and its affiliated programming software. I have been reading quite alot of forum posts here to reduce the chances of me asking a question that was just answered 5 minutes ago in another thread, but if that happens, please forgive me... I tried
. Anyways, below is a block diagram of my project. From reading and searching through other posts, I believe it will work on a hardware level; I am not getting into the programming side yet. If anything is amiss, could be done better, or is just flat out wrong
, please, please let me know.What's going to control what
Its pretty straightforward, the 0-12vdc PWM input (which I will intercept from my trucks dome light) will simply be mirrored to the footwell lights output. Whenever the dome light times out and dims, I would like the footwell lights to do so also (I may add more control later, hence why its only mirroring now). The three 0 or 12vdc inputs will control the underbody lights. The underbody output will be PWM simply for fading in/fading out purposes.Optocouplers
The schematic I plan on using for the optocouplers can be found here
under "method 2". I found this schematic after I found out that the arduino only accepts 0-5v for its inputs.12vdc power conditioner
The schematic I plan on using for the 12vdc power conditioner can be found here
. C2, C3, and IC1 will not be in that circuit as those components are for dropping the voltage. I found this schematic after I found out that hooking up an arduino to an operational car battery, without protection, can be hazardous to its health (due to voltage drops while cranking, and potential voltage spikes while the engine is running)Arduino Nano
The specs can be found here
. Figured I would put this on here just for quick reference.12vdc power amplifier
The amplifier that I will be using to drive the underbody and footwell lights can be found here
Again, if anything is missing, could be done better, or is just flat out wrong, please don't hesitate to tell me. If you need more information, please don't hesitate to ask, I will do my best to answer.
Thanks for all your time,
Just a quick question, could I use a bigger capacitor (C1) in the power conditioner schematic
to help steady out the voltage for the few seconds the voltage drops while the starter is cranking?