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Members: 664 | Total Threads: 50,905 | Total Posts: 519,138 Currently Active Users: 1,347 (0 active members) Please welcome our newest member, nellie691 |
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18-07-2019, 02:44 PM | #1 |
Guest
Posts: n/a
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Voltmeter phone charger
I fitted this earlier, I’m very good at running out of charge with my phone when out on rides, it’ll also power the sat nav, so just been for a ride, running at approx 6k revs it’s 14.2v and doesn’t go above that so reg/rec is doing its job nicely, but I got a surprise when I switched the lights on, it read 14.4 and up to 14.6 but didn’t go above that, I know nothing about electronics, does switching the lights on employ another phase of the alternator or something?, Cheers Mark
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18-07-2019, 03:58 PM | #2 |
Registered User
Join Date: Aug 2011
Location: Southampton
Bike: M1100evo
Posts: 2,465
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I'm no electrical expert but is it something to do with Ohm's Law?
Ohm's law states that the electrical current (I) flowing in a circuit is proportional to the voltage (V) and inversely proportional to the resistance (R) i.e. I = V/R. So, when you turn the lights on, you increase the current draw, which means the voltage also increases in proportion. Happy to be corrected if I'm wrong! |
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