Arduino Automatic Coolant Temp Hack for Better MPG's

Yeah you will have to get a hold of him for his version. He was last logged in today around noon so he is still around.

As far as my Arduino version goes the source code and the schematic is in the first post. I had it working pretty good on my breadboard with an Arduino Nano but never finished up since I'm using ccdisce's version. Which reminds me I need to update my review thread for cold weather use.

 

Did you PM him or send an email? If just PM then you might want to try the email route as he may get that.

 

I got a response from him. Told him to contact you both if he still wants to sell them.

 

I have not messed with this for a long time. I don't even use it. I actually still have the prototype in my breadboard. I've been busy with other projects. I use ccdisce's device and gave up on mine.

Make sure the directory structure is correct with the DigiPot.h. I don't remember much about the arduino software but don't you have to import or place the .h and or the .cpp file in a directory that's located in your arduino directory?

 

Just got home and installed the arduino IDE. I'm running kubuntu linux so your location might be different.

DigiPot folder I put into /home/<username>/sketchbook/libraries/

On a windows box I think that might be your documents folder/sketchbook/libraries or something like that.

At least with the 1:1.0.5+dfsg2-2 version that I installed from the software center I had to make some changes to the DigiPot.cpp and DigiPot.h files.

Replace

Code:

#include "WProgram.h"

With

Code:

#include "Arduino.h"

Thats the only change I made to get it to compile. I never did get your error. Your error sounds like the DigiPot folder is not in the right location.

 

You're welcome. Might want to test it with a multimeter and a variable power supply to make sure things work correctly. Thats how I tested it before I put it in the Prius. Or at least modify the code to simulate the temperatures. Just a small precaution to make sure everything is correct. Its better to short out the board than the Prius.

Let me know how it goes. I kind of want to finish this up with the multi color LED in the dash.

 

Your welcome. I never got past the bread board stage but it did work from what I remember. I think the only issue I was having was a temperature issue with the transistor. Depending on the temperature of the transistor you get different values and I never did fix that. So you may want to get some canned air and play with the temperature of the transistor to see what it does. You might have to do some adjustments with an additional external temperature sensor or do a circuit redesign. I'm still using ccdisce's version in my car and never really wanted to mess with mine. I've been having some trouble with his not working but I have not had any issue from it for the past few months.

Let me know how yours goes. I would still like to use mine with the multicolor LED just to let me know it working and what its doing. If I ever get time I would like to work on it again.