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Resistance Question
Question: I am interested in tapping into the engine sensors on
my car, doing it the old fashion way - hardwire ( Yes, I know about OBD II - not suitable for my application). The temp. sensors are just variable-resistance sensor, but I dont want to tap into line if its going to throw off the car's computer. What I want to do is be able to pull the values of the sensors, say ... into another gauge, but dont want to throw off other gauges and the computer reading the resistance For the technical people, What I am wanting to accomplish is to have a pc/laptop, pulling the resistance of the sensors in thought the game port, which will allow for 4 resistor readings, and have them logged. There shouldnt be a voltage going across the ground resistance of the sensors, as in a standard voltage gauge which moves a needle based on voltage drops with ground resistance. *** Any help/comments/questions about this is welcomed !!! *** ----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeed.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =--- |
#2
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Resistance Question
Hmm, Thats Odd. The sensors use resistance to ground. I currently have many different types of sensors being logged by a couple of differnet game ports in the house. The question was: would tapping into and aquiring the resistance value from a sensor effect the ECU of a car (beyond a tollerable level). Again - There is NO voltage across the sensors, just resistance. On 24 Jun 2004 14:28:23 -0700, (JeffM) wrote: I am interested in tapping into the engine sensors I [want] to...have a pc/laptop...the game port Zero You will likely destroy the game port. An automobile electrical system has voltages beyond what you imagine. ----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeed.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =--- |
#3
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Resistance Question
"Zero" wrote in message ... Hmm, Thats Odd. The sensors use resistance to ground. I currently have many different types of sensors being logged by a couple of differnet game ports in the house. The question was: would tapping into and aquiring the resistance value from a sensor effect the ECU of a car (beyond a tollerable level). Again - There is NO voltage across the sensors, just resistance. Dude Zero, If you knew the 1st thing about electricity, you would know that when a current flows through a resistor (i.e there is a potential difference between both terminals) then there is a voltage drop across the resistance. To get the resistance value accurately, you would have to disconnect the sensor from the circuit totally, and measure the resistance with a high impedance device such as a digital multimeter or an oscilloscope. But I suggest you learn the fundamentals of electricity before you dabble with your ECU first. |
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