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<p>A large capacitor will slow down the build-up of the voltage, so
the needle of the fuel gauge (which is a Voltmeter essentially)
will fluctuate less. It works exactly the same as an air filled
expansion vessel in a water mains to prevent knocking in the pipes
due to sudden pressure build caused by a water shut of valve in
e.g. washing machines, however the water is replaced by electrons<br>
</p>
<p>What worries me is the 5,5V which seems rather low in a 12-15V
electrical system, but I am not an electronic man. I do not know
what the maximum Voltage on the gauge is, but if it is more than
5,5V I imagine the capacitor could fail?</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Op 15-11-2018 om 11:07 schreef
<a class="moz-txt-link-abbreviated" href="mailto:simon.lachlan@alexarevel.plus.com">simon.lachlan@alexarevel.plus.com</a>:<br>
</div>
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<p class="MsoNormal">Hi, <o:p></o:p></p>
<p class="MsoNormal">Questions for the tech type super-gurus.<o:p></o:p></p>
<p class="MsoNormal">See the attached article, something I
picked up on the internet &/or from this list.<o:p></o:p></p>
<p class="MsoNormal">I’ve finally got round to doing it and have
bought a pair of super-capacitors (SC), below:<o:p></o:p></p>
<p class="MsoNormal"><a
href="https://www.ebay.co.uk/itm/2-Pcs-4-0F-5-5-V-Super-Capacitor-H-Type-Button-Smart-Capacitance-Universal/272412952404?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649"
moz-do-not-send="true">https://www.ebay.co.uk/itm/2-Pcs-4-0F-5-5-V-Super-Capacitor-H-Type-Button-Smart-Capacitance-Universal/272412952404?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The article infers to me, at least, that
the + terminal of the SC is wired directly to the same
terminal connection on the gauge as the wire from the tank
sender unit. The – terminal is earthed. How does that system
work? Won’t the tank’s fluctuating signal, for want of a
better word, simply bypass the SC and carry on flickering the
needle??<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And, assuming I ever get the wiring sorted
out, will the SC get hot? Mine has a metal case and I’ve had
to thoroughly insulate it. I have visions of the fuel gauge
working nicely until the insulation catches fire………<o:p></o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
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