Im going to start this tutorial. Please direct all responses to the “Arduino Manager Development for All” to keep this thread clean.
This mixer controller is for the AEM wideband sensor and gauge kit with the LSU 4.9 sensor ( part# 30-4110). These can be found on Ebay, Amazon, Summit, Jegs, etc. You may use any arduino; however, to ensure replication I would recommend using the Nano with the screw shield as this will be used in this tutorial. All components used will have links to sources for purchase; however, you can shop around to find your best price. There are many sources for all components used.
So to start out you are going need to get some things. Basic electrical tools and all components needed to build your kit. This tutorial is only to show how to wire your system, installing this into an enclosure adding a power switch etc will be up to you for a custom install. There are many ways to go about this part of the build.
You will need some basic wiring tools. Crimper. wire stripper, soldering iron, electrical screw drivers etc.
The AEM kit can be found from numerous sources, Here is an ebay listing we have used in the past.
To get the Arduino Nano and screw shield from one source you can go here. Be careful purchasing these, not all come pre assembled if it looks like a good deal its probably because you have to solder it together yourself.
Most I think are going to use a 12 v power supply, so you will need a way to reduce voltage down to 5 V to run the arduino and power the servo.
The servos we use are the MG996R these are a metal gear servo and so far have been pretty tough and cost effective.
For your manual control you will need a 10K potentiometer. This is very handy when starting the machine and getting things up and running. Getting a few extra may be handy as we can use one in place of the O2 sensor for bench testing.
Once things are up and running we then need to switch over to automatic mode. This is done with a simple rocker switch these can be found locally or of coarse ordered on line. Also getting a few extras here is a good idea for your system’s power switch.
In order for the controller to see this switch as ON or OFF we will need to install a pull down resistor. This is to pull the switch down to zero volts.
To connect the servo we make our own cables. but for practical reasons here is a link for extension cables.
You will need to get some wire for your battery connection. Depending on if you use the rocker switches or the type with spade terminals you will want to get some female socket terminals to make those connections.
So once we have all the components listed we will be ready to build!!