anyone fited a Voltmeter ? - Page 4 - Triumph Forum: Triumph Rat Motorcycle Forums
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post #31 of 44 (permalink) Old 11-23-2016, 09:16 AM
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Originally Posted by shmalick View Post
great digital voltmeter but i am looking for analog voltmeter with bracket as shown in pic. any idea where to buy one like this. Thanks in advance
The voltmeter is here:

http://www.speedwaymotors.com/Speedw...ratedCart=True

That's off the Honda Shadow forum, the poster goes into more detail about the cup and bracket but I can't make head or tail of it, see post 4 here:

http://www.hondashadow.net/forum/53-...-resolved.html
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post #32 of 44 (permalink) Old 11-23-2016, 04:22 PM
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Forchetto, thanks so much for the response. I am from USA and had my Bonneville t100 shipped to South Korea to ride around. Your post has been a great help to add mods to the bike. Cheers,
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post #33 of 44 (permalink) Old 01-21-2017, 03:23 AM
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finally got the analog voltmeter ready to install, Now seek some help on where to plug this meter so that i can get somewhat accurate reading. The best place is to hook up directly to batter but it is not practical sine it will drain the battery when bike is not being used.. Any help will be appreciated.
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post #34 of 44 (permalink) Old 01-21-2017, 03:53 AM
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One way is to monitor the voltage at the regulator connector inside the headlamp. Two wires there are connected directly to the battery through thickish cables and give a reading nearly equal to the one obtained at the battery terminals, perhaps 0.2 volts less. Use DEcosse's circuit diagram for a relay controlled arrangement shown here:





The reading is taken from the only wires in the headlamp shell that have good connections to both the battery and ground: These were the wires that take the output of the regulator to the battery via nš11 main 30 amp fuse. The volt drop here is only 0.2 volts. These are in the connector that terminates in the regulator assembly. Brown wire is +, Black is -. These connections are always live, as they're connected directly to the battery via the main fuse, and not controlled by the ignition switch. Can't use them without the relay as the instrument would be ON all the time.

The operating coil of the relay was energised by the pilot or parking lamp power wires. This, of course, only comes on with either the ignition switch in the ON or Parking position.The actual battery voltage signal for the voltmeter is taken from the regulator connector. The instrument is also powered by the same signal to be measured, no separate power needed.

One end of the normally-open contact went through a thin cable to the inside of the regulator connector battery positive, and the other end to the voltmeter.

The negative input to the voltmeter goes directly to the same regulator connector, ground or negative, with a similar thin wire.
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post #35 of 44 (permalink) Old 01-21-2017, 05:42 AM
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Cable size will certainly have an effect, I have a motogadget speedo with battery volts as one of the options, using the existing speedo supply cables (small) the speedo reads 14.2v were as my multi meter on battery reads 14.66v, so does really depend on how accurate you want to be, I'm happy enough seeing a 14 number
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post #36 of 44 (permalink) Old 01-21-2017, 07:29 AM
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Quote:
Originally Posted by Ade-955i View Post
Cable size will certainly have an effect
The cables I've pointed out earlier, from regulator to battery via the 30amp main fuse are quite large, probably 14swg, there's a little drop on them and another little in the fuse/fuseholder, about 0.2-0.3volts.
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post #37 of 44 (permalink) Old 01-21-2017, 07:38 AM
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Quote:
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The cables I've pointed out earlier, from regulator to battery via the 30amp main fuse are quite large, probably 14swg, there's a little drop on them and another little in the fuse/fuseholder, about 0.2-0.3volts.
Sorry, yes your connection point will certainly have less volt drop due to larger cable, was just highlighting the fact that if he taps in somewhere else the cable size will have an effect, probably not put over that we'll originally
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post #38 of 44 (permalink) Old 01-21-2017, 08:48 AM
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I'm thinking about putting one on my bike after my latest episode with the battery and regulator.
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post #39 of 44 (permalink) Old 01-23-2017, 12:45 AM
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thanks so much for the guidance and clear instructions on how to add analog voltmeter. The only question have is that if I use 16awg as compare to 14awg wire then how much drop in voltage to expect if any. thanks in advance.
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post #40 of 44 (permalink) Old 01-23-2017, 05:03 AM
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The thick wires are already there at the regulator connector (Brown+ and black -). The instrument wires can be thin as the voltmeter doesn't draw any significant current, so no apreciable volt drop from the regulator cables to the instrument.
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