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20 May 2013, 10:06 (Ref:3250412)
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#1 | ||
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Racer
Join Date: Nov 2007
Posts: 105
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AiM data logger temp sensor question
I'm looking at connecting a Bosch or similar NTC temp sensor to a analog channel on an EVO4 logger but cant seem to find any info on how I would wire it or work out the mv scale to make a custom sensor. I have the data sheet for the sensor in C° = ohms. can anyone help me with this?
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20 May 2013, 12:53 (Ref:3250523)
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#2 | ||
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Veteran
Join Date: Dec 2005
Posts: 1,164
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Race Studio wants to see a voltage. So you need to make a potential divider circuit:
Supply Voltage from Evo Sensor Here Signal Output to Evo Resistor Ground to Evo I don't think the Evo4 has internal pull-up/down resistors, so you'll have to wire up your own. You should be able to work out what resistor you need so that you use as much of the 0-5V scale as possible (although that's not really critical unless you want the best resolution possible on your sensor). Maybe that'll help, but I don't know your level of technical know-how, so that might be gobble-de-gook. |
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__________________
Dallara F307 Toyota, MSV F3 Cup - Class and Team Champion 2012 Monoposto Champion 2008, 2010 & 2011.
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21 May 2013, 05:37 (Ref:3250913)
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#3 | ||
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Racer
Join Date: Nov 2007
Posts: 105
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I did find a picture of a circuit not sure if it correct, but it was as follows.
5v through a 2k resister to the signal, then the signal and Gound connected to the sensor. The formula was, mv= 5000*(Sensor Resistance/(Sensor Resistance+2Kohm) Does this sound Correct? |
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