DIY Engine Temp Sensor/Gauge for 12HT (or any engine really)

Joined
Dec 13, 2010
Messages
134
Location
Langley BC
I've been struggling for years on how and where to install a secondary Engine Temp Sensor/Gauge on my 12HT.
We all know that the stock Toyota Landcruiser Temp gauge is a little flakey.
Many people suggested to tap/splice into the top hose but I was very hesitant to do so since it's not really at the engine and is dependant of the thermostat opening to get a real reading.
Not to mention cutting a perfectly good hose and the possibility of more leak points.

Over the past couple years I've been playing with Arduino boards and I came up with a simple solution.
It works very well and is very close reading to what the engine is doing without having to "tap" into anything.
Only cost me around $30.00

Please have a look on what I came up with:

Arduino Nano: Arduino Nano - https://store-usa.arduino.cc/products/arduino-nano?selectedStore=us

OLED Screen: OLED 128x64 Pixel, I2C, 1.3 inch, SSD1306 SH1106, 3-5V - https://www.universal-solder.ca/product/oled-128x64-pixel-i2c-1-3-inch-ssd1306-sh1106-3-5v/

Waterproof Temp Sensor: Digital Temperature Sensor DS18B20 - Watertight - 1 Wire Interface - 3 Meter Wire - https://www.universal-solder.ca/product/digital-temperature-sensor-ds18b20-watertight-1-wire-interface-3-meter-wire/

Layout: http://flyballequip.com/upload/53161/documents/01621C1A5A462F62.pdf

Code: http://flyballequip.com/upload/53161/documents/EF2BF0919013C77B.rtf
Or: http://flyballequip.com/upload/53161/documents/440AE0567FA9526B.doc

I hope this inspires you!

Mike

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David*BJ70

Looking forward to reach the end of the world
Joined
Jan 13, 2004
Messages
1,900
Location
Montréal, Canada
Here is my simple, cheap, accurate and very effective option. I am even able to see when the thermostats open. The thread pattern is the same as plumbing parts and T sold in bulk at hardware stores


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relaxedcruiser

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Joined
Apr 28, 2016
Messages
127
Location
Opotiki,Bay of Plenty New Zealand
This is annother solution, I think that it is quite "clean" and was not too difficult to built.

 

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