Easy Costruction and Installation of a FUEL GAUGE
Hi,
After my previous post where I described my simple circuit to display alternator charge status (see Gadgets & Farkles section) I will now present another of my achievements. This is an easy installation (without modify the bike tank) FUEL GAUGE. (All new alert indicators are placed on a small additional panel with three high-brightness 3mm red LEDs, see image). http://s2.postimage.org/cQ0Ni.jpg http://s2.postimage.org/cQ3hr.jpg http://s2.postimage.org/cQ5MA.jpg http://s2.postimage.org/cQ8gJ.jpg http://s2.postimage.org/cQfL9.jpg http://s2.postimage.org/cQifi.jpg http://s2.postimage.org/cQkKr.jpg Any comment is welcome !!! |
Re: Easy Installation FUEL RESERVE Indicator
The third LED is used for indication of oil pressure and will be described in the next post.
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Re: Easy Costruction and Installation of a FUEL GAUGE
Thats deadly and really looks like it should be on the bike
Good job man |
Re: Easy Costruction and Installation of a FUEL GAUGE
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:plus1: Excellent.Awesome job. :) :lol: |
Re: Easy Costruction and Installation of a FUEL GAUGE
Absolutely brilliant.
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For anyone (like me) who didn't know what NTC was, it apperas to be a type of thermistor (that is, thermal resistor) with an inverse relationship between resistance and temperature (temp up, resistance down, the NTC stands for Negative Temperature Coefficient).
http://www.cornerstonesensors.com/Ab...hat&Print=Page http://en.wikipedia.org/wiki/Thermistor#NTC Googling, I can see that this is a fairly common use of NTC Thermistors, but why does it work? Is the liquid gas that much cooler than the air above it? Also, the Flyer says that it's a 3.5 kOhm NTC... is that the R25 or what? What ever happened to the Flyer? It looks like he never got around to posting the oil sensor instructions.... |
It has been over 3 years so he likely found something else to ride or moved away. Riders come and go.
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Oh, sure, (sort of) answer the easy question, but not the ones I'm really curious about. I guess I could do a more intensive googling for those though.
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I wouldn't want some hot resistor in my gas tank, though... And I have no idea what the resistors in series are for (parallel to the LED branch), and I wonder what the resistor parallel to the LED is for, that one is probably to keep the LED from gently shining when the NTC is still submerged. |
Oh, that is an interesting consideration! Do you think it would get hot enough to cause potential ignition? Geez, I hope that's not why the flyer stopped posting.
Whenever I'm not in a class that actively uses circuits, I get a bit fuzzy on electrical stuff... I found a post on another forum http://www.diystompboxes.com/smfforu...prev_next=prev that explains R4 Quote:
The combination of R3 and the unsubmerged NTC must be supposed to draw the appropriate amount of voltage for the LED, though I'm a bit confused why R3 wouldn't be before they LED, as that's where I understand voltage limiting resistors are supposed to go, but then then again, as I said, I'm pretty fuzzy on this. I did fail my circuits class the first time around. |
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