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Weeeeeeeee
Getting all excited here :luuurve: |
I am looking for someone to build me an electronic device that can be programmed to react off different resistance inputs. I can do it with a few relays, resistors & temp sensor but want it electronic. The device will need to react to different resistances & once a specific resistance is seen, turn on & off different circuits.
As in the past, with all my mods we do lots of testing, so we need to test this mod on different bikes first to see if the mod works on all XT's. Once we have worked out if we can make an electronic devise I will tell all. I would normally keep such testing behind closed doors but now need some help. :sleep01: |
So, what we looking at here?
The AFR change is seen by the ECU as a change in resistance? And what you want is something to go inline to oppose that? |
I need the device to switch to different circuits when it sees curtain resistances.
The device has one input & one output wire, when it sees lets say an input resistance of 20K it switches to one output thought a resistor, then when it see a resistance of lets say 10k it needs to switch the first output circuit off & switch to the second output. Any ideas? The basic idear is shown on this diagram, it would need a device that can sence resistance & switch circuits only at the given resistance. Simple circuit, but do not know of a device that can actvate the switching. http://i201.photobucket.com/albums/a...titled-1-2.jpg |
Whats the voltage on the input?
Because according to ohms law V=IR Surely then you can work out the current through that set, and the current and voltage from the 10k input because less resistance = more voltage and just find something that will switch based on the voltage in the line? EDIT: Even simpler, a transistor should do the trick no? Example, when the resistance is 20k the voltage is say 6v. When the resistance is 10k the voltage is 12v. A transistor can see the difference between the 2 voltages and switch circuits from the input voltage. Least, thats my brief understanding of it from what I just read. |
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The input wire has a fixed 5volt input then runs through a NTC resistor, at 0.640K ohms I want it to run through the top circuit throught a prefixed resistor, then when the input resistance reaches 0.140 K ohms I want it to switch to the other circuit with no resistor. |
Kev,
Have a play with this. http://www.falstad.com/circuit/ Its a circuit simulator. Might be useful. EDIT: Just spoken to a mate of mine, might be able to get away with a couple of Zener Diodes he say. I'm at college tomorrow and got electrical second lesson for a couple of hours so ill quiz my tutor. should be able to help. |
Siliconchip.com.au
Hi Kev. I'm not sure if these guys (
http://www.siliconchip.com.au/menu_2...s/aboutus.html) can help but a few years ago I bought two electronic projects from Jaycar that these guys designed.
It's a bit of a long story but basically I wanted to control a 4speed auto's lock up clutch torque converter at a selectable speeds in a 65 Impala. I had to modify them to link the two to do the job I wanted. I emailed them and they helped me redesign the output of the first to link to the second. That same project has been in the car since 2005 and still working too..:winner: They design all sorts of circuits as projects for amateurs and professionals, so you never know..It wouldn't hurt to send them an email with your needs maybe? Greg. |
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Kev, I think I may have cracked it.
What resistor was you thinking about putting in the circuit when its at 640 ohms? Bah... Had something that I think worked and lost it by mistake and can't remember what I had done :( |
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