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ThatDippyTwat |
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ThatDippyTwat World Chat Champion
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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stinkwheel |
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stinkwheel Bovine Proctologist
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ThatDippyTwat |
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ThatDippyTwat World Chat Champion
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The Shaggy D.A. |
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The Shaggy D.A. Super Spammer
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Posted: 15:14 - 29 Dec 2016 Post subject: |
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It wouldn't be too hard a project to make an accurate fuel gauge - read the sender value with an Arduino (or PIC of choice), then output a corrected value to the display (gauge/LEDs/screen/whatever). ____________________ Chances are quite high you are not in my Monkeysphere, and I don't care about you. Don't take it personally.
Currently : Royal Enfield 350 Meteor
Previously : CB100N > CB250RS > XJ900F > GT550 > GPZ750R/1000RX > AJS M16 > R100RT > Bullet 500 > CB500 > LS650P > Bullet Electra X & YBR125 > Bullet 350 "Superstar" & YBR125 Custom > Royal Enfield Classic 500 Despatch Limited Edition (28 of 200) & CB Two-Fifty Nighthawk > ER5 |
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weasley |
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weasley World Chat Champion
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ThatDippyTwat |
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ThatDippyTwat World Chat Champion
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WD Forte |
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WD Forte World Chat Champion
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ThatDippyTwat |
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ThatDippyTwat World Chat Champion
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The Shaggy D.A. |
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The Shaggy D.A. Super Spammer
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Posted: 20:16 - 29 Dec 2016 Post subject: |
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If I could trust the local scum to leave it alone, I'd like to steampunk the Enfield with some brass/glass arrangement :-
https://s-media-cache-ak0.pinimg.com/736x/75/05/b6/7505b6b61d28c26a1086601b9ae4be94.jpg ____________________ Chances are quite high you are not in my Monkeysphere, and I don't care about you. Don't take it personally.
Currently : Royal Enfield 350 Meteor
Previously : CB100N > CB250RS > XJ900F > GT550 > GPZ750R/1000RX > AJS M16 > R100RT > Bullet 500 > CB500 > LS650P > Bullet Electra X & YBR125 > Bullet 350 "Superstar" & YBR125 Custom > Royal Enfield Classic 500 Despatch Limited Edition (28 of 200) & CB Two-Fifty Nighthawk > ER5 |
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andym |
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andym World Chat Champion
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NutsyUk |
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NutsyUk Nearly there...
Joined: 22 Jun 2016 Karma :
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Posted: 14:04 - 30 Dec 2016 Post subject: |
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WELL... Thats a firery death just waiting to happen....
On my lexmoto I think its Volt, the divider built into the anilogue gauge is a beefy divider with high wattage.
On my Speedo Project its a volt meter, but to get an accurate reading you have to first set the low and high fuel points and the program then extrapolates levels.
The trouble is a volt meter without a voltage reference is unreliable as the mains voltage can fluctuate.
So in your project youll want to make a formula that reads the reference and put it against the reading on the input.
As for that formula... I can let you know. When i work it out myself Im not at that bit of my project yet. ____________________ Yamaha FZ8/Fazer800 (split headlight one) 2014, gingerly getting used to the massive increase in HP and not killing myself in the process! That was easy to get used to.
Kawasaki ER6F 2007 650 Gonna sell as a project bike!
Lexmoto XTR S 125 Sold! |
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The Shaggy D.A. |
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The Shaggy D.A. Super Spammer
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ThatDippyTwat |
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ThatDippyTwat World Chat Champion
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WD Forte |
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WD Forte World Chat Champion
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ThatDippyTwat |
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ThatDippyTwat World Chat Champion
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NutsyUk |
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NutsyUk Nearly there...
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ThatDippyTwat |
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ThatDippyTwat World Chat Champion
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NutsyUk |
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NutsyUk Nearly there...
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Pete. |
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Pete. Super Spammer
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Posted: 14:06 - 31 Dec 2016 Post subject: |
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The sender is a variable resistor so in it's simplest form the gauge and sender form part of a voltage splitter circuit.
Looking at an old Fazer wiring schematic that seems to be the case, as the meter has only power and ground then a third wire goes through the sender to ground. With the float level high, resistance across the sender is low so the gauge gets more volts. As the fuel level drops resistance at the sender increases and gauge voltage reduces giving you a lower reading.
Usually sender resistance is very non-linear, presumably because the sender swings through a progressively wider arc as the fuel level drops. When the tank is full, taking out an inch of fuel level will cause the float to drop an inch. When the tank is near empty however, taking out an inch of fuel can cause several inches swing of the float arm. How well this is accounted for in the design will determine how accurate the gauge is. ____________________ a.k.a 'Geri'
132.9mph off and walked away. Gear is good, gear is good, gear is very very good |
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ThatDippyTwat |
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ThatDippyTwat World Chat Champion
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Posted: 15:40 - 31 Dec 2016 Post subject: |
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Pete. wrote: | The sender is a variable resistor so in it's simplest form the gauge and sender form part of a voltage splitter circuit.
Looking at an old Fazer wiring schematic that seems to be the case, as the meter has only power and ground then a third wire goes through the sender to ground. With the float level high, resistance across the sender is low so the gauge gets more volts. As the fuel level drops resistance at the sender increases and gauge voltage reduces giving you a lower reading.
Usually sender resistance is very non-linear, presumably because the sender swings through a progressively wider arc as the fuel level drops. When the tank is full, taking out an inch of fuel level will cause the float to drop an inch. When the tank is near empty however, taking out an inch of fuel can cause several inches swing of the float arm. How well this is accounted for in the design will determine how accurate the gauge is. |
I appreciate it's non-linear, which is why I'll be putting a trimmer on each line, so it can be adjusted to suit actual, real-world levels. There's not point in uber accuracy, 4 LED's can only display with an accuracy of 12.5% anyway, but a linear response is needed. |
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NutsyUk |
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NutsyUk Nearly there...
Joined: 22 Jun 2016 Karma :
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Pete. |
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Pete. Super Spammer
Joined: 22 Aug 2006 Karma :
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Posted: 16:27 - 31 Dec 2016 Post subject: |
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Fill tank to brim, ride 100 miles, fill tank to brim. Divide miles by litres used then multiply by tank capacity. This will give your full-tank range. Reset trip meter every time you fill up. ____________________ a.k.a 'Geri'
132.9mph off and walked away. Gear is good, gear is good, gear is very very good |
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ThatDippyTwat |
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ThatDippyTwat World Chat Champion
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Old Thread Alert!
The last post was made 7 years, 116 days ago. Instead of replying here, would creating a new thread be more useful? |
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