Cheap oil temp guage
12-04-2017, 10:22 PM
#16
Rennlist Member
Thread Starter
Cool setup. I like how it integrates into the bat wing.
You are not too far from the last step of using Arduino to implement that voltage to temp conversion. I used Arduino in my oil temp gauge thread.
This link shows you how to use Arduino to make a voltmeter.
http://www.instructables.com/id/Ardu...Voltage-Meter/
All you need to change is one line of code (the third last line) where voltage is computed. Instead of displaying voltage, you convert it to temp and display the temp instead. And once you've tested it, you can replace the big Arduino board with something very samell like the nano (like a USB drive size).
You are not too far from the last step of using Arduino to implement that voltage to temp conversion. I used Arduino in my oil temp gauge thread.
This link shows you how to use Arduino to make a voltmeter.
http://www.instructables.com/id/Ardu...Voltage-Meter/
All you need to change is one line of code (the third last line) where voltage is computed. Instead of displaying voltage, you convert it to temp and display the temp instead. And once you've tested it, you can replace the big Arduino board with something very samell like the nano (like a USB drive size).
I've done a lot of programming with PIWIS and got way into the TunerPro software for EECIV (TurboCoupe) as far as changing injector flow tables , timing tables, MAF tables, even converting from VAF to MAF, and modified about everything there is to modify on an EECIV computer ,but I have never written a single line of code.
I may give this Arduino a go, and see if I can make it happen.
12-04-2017, 10:22 PM
#17
Here is an online workshop manual , it has the diagrams in it.
http://workshop-manuals.com/porsche/
http://workshop-manuals.com/porsche/
Happy to help with Arduino, just buy it and you will figure it out.
12-04-2017, 10:40 PM
#18
Rennlist Member
Thread Starter
12-04-2017, 10:48 PM
#19
Rennlist Member
Thread Starter
duplicate post
Last edited by Porschetech3; 12-04-2017 at 10:50 PM. Reason: duplicate post
12-05-2017, 03:38 PM
#20
That almost looks doable for me. Hardware wise and only 6 wires..But I have NEVER written any code. I'm sure I could screw that up and get lost, with a wrong word or symbol somewhere.
I've done a lot of programming with PIWIS and got way into the TunerPro software for EECIV (TurboCoupe) as far as changing injector flow tables , timing tables, MAF tables, even converting from VAF to MAF, and modified about everything there is to modify on an EECIV computer ,but I have never written a single line of code.
I may give this Arduino a go, and see if I can make it happen.
I've done a lot of programming with PIWIS and got way into the TunerPro software for EECIV (TurboCoupe) as far as changing injector flow tables , timing tables, MAF tables, even converting from VAF to MAF, and modified about everything there is to modify on an EECIV computer ,but I have never written a single line of code.
I may give this Arduino a go, and see if I can make it happen.
If you care capable of connect wires then this wont be a problem.
There is a lot of fun stuff you can do if you are creative.
12-05-2017, 05:09 PM
#21
Burning Brakes
Simple?? lol ..ok...I got no idea where to start. I am basic electronic wise such as volts.ohms. resistance,diodes, resisters, transistors, ect,but when you ties a bunch on them together and then put a chip in, I'm lost.
If you could come up with a step by step SIMPLE instructions for a plug and play conversion box to put inline for this to display the temp, and take the place of the cheat sheet, it would be great !!
If you could come up with a step by step SIMPLE instructions for a plug and play conversion box to put inline for this to display the temp, and take the place of the cheat sheet, it would be great !!
12-05-2017, 08:24 PM
#22
Rennlist Member
Thread Starter
12-05-2017, 08:40 PM
#23
If you want to learn the basics of Arduino programming, this is a great site (an example) to start with. Almost self-explanatory...
https://www.arduino.cc/en/Tutorial/Blink
https://www.arduino.cc/en/Tutorial/Blink
12-06-2017, 02:37 AM
#24
Rennlist Member
Thread Starter
If you want to learn the basics of Arduino programming, this is a great site (an example) to start with. Almost self-explanatory...
https://www.arduino.cc/en/Tutorial/Blink
https://www.arduino.cc/en/Tutorial/Blink
I have memorized a large portion of my cheat sheet and know what my oil temp is at any given time.
I have a feeling it is gonna take me a while to master writing a simple computer code. lol
01-06-2018, 09:36 PM
#26
Rennlist Member
Thread Starter
01-07-2018, 12:35 PM
#27
Advanced
I'm a software engineer. I've been wanting an excuse to play with Arduino. This may be it. If you're not too far along yet or haven't started, maybe I can help. I write code for a living, just haven't played with Arduino yet.
01-07-2018, 05:16 PM
#28
Rennlist Member
Thread Starter
The digital temp thermometer is calibrated and uses a B3950 10k ohm NTC sensor, and has an internal resister of 10k as a voltage divider. The factory uses a 8k ohm internal resister as a voltage divider (inside the DME)so with a 45k ohm installed in parallel it will be near the 8k of the factory voltage divide(10k and 45k in parallel is about 8.1k) . Preliminary tests look good with the temp display being about 2 degrees lower than actual at 50-60F and spot on at 120F-160F, I am expecting it to posibly be about 2 degrees high in the upper temps but I could not get an accurate reading with my Fluke infrared at high temps. The steam from the hot water and stainless steel pot were causing really crazy readings from the infrared/laser thermometer.I have to find a more suitable way to test the high temp accuracy, but if within a couple degrees I think it will be acceptable.
One caveat of this particular digital temp display is the the temp range will be limited to around 30F to 257F, above 257F it has a high temp warning and just reads HHHH, which for me is not a problem as I have decided that 260F is my absolute shut it down temp and cool it off, call it a day, then do some more oil cooling mods.But some people are more willing to run higher temps up to and over 300F. The oil can take it for a period of time, but on my DD that sees some track time 230-240F is my real comfort zone.
The Arduno with the proper code and a nice enclosure would be the best way to go. If I can find a proper enclosure that doesn't require a custom fabricated/hand made enclosure that would make a easy assembly DIY plug and play with only using a cable and the 3 wire hook-up to DME is the end game.I'm retired with a dissablilty and do no heavy work, just taking my time and piddling for therapy and enjoyment.
