Volt Meter

[molecules]

Hi guys, am considering fixing(diy) a volt meter on my bike and would like to know which tapping point is recommend3med to get the most accurate readings. :screwy: Looking forwa4d to your replies. Thanks.

 

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[Tachnicolour]

1)From battery. Wire it through a relay actuated by any 12V source, e.g. pole light, tail light.

 

From battery because it gives you voltage on tap, not affected by voltage drop, as compared to if you tap off headlight wire etc.

 

Relay to isolate the voltmeter from battery when bike is off. Turning on the ignition flicks on the pole light and that activates the relay.

 

Don't forget to add an inline fuse off the positive terminal of the battery towards your voltmeter/relay.

 

 

 

 

 

2) Alternatively, wire +ve lead to voltmeter via any fuse coming out of the battery(pull the fuse, stick the wire end into the slot and slot the fuse back in. Connect the negative lead from voltmeter back to battery.

 

Less troublesome. Haha. Difference is negligible. Go with method 2). Voltmeter isn't 100% accurate anyway.

Edited January 25, 2014 by Tachnicolour

[molecules]

From battery. Wire it through a relay actuated by any 12V source, e.g. pole light, tail light.

 

From battery because it gives you voltage on tap, not affected by voltage drop, as compared to if you tap off headlight wire etc.

 

Relay to isolate the voltmeter from battery when bike is off. Turning on the ignition flicks on the pole light and that activates the relay.

 

Don't forget to add an inline fuse off the positive terminal of the battery towards your voltmeter/relay.

 

 

 

 

 

Alternatively, wire to any fuse coming out of the battery and then negative lead back to battery.

 

Less troublesome. Haha. Difference is negligible.

 

Thanks for the great pointers.

 

For the 1st optuon when u mention relay, do u refer to the ones existing on the bike or do i need to purchase a specific type from e.g Sim Lim Tower?

 

As for the 2nd option, any fuse refers to the ones in the fuse box right? simply coiling the volt meter's wire around the fuse's legs and inserting it back will do?

 

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[molecules]

Noted bro. It seems.like 2nd option is easier to do. So, am i correctbto say that the +ve lead can go to either side of the fuse legs? -Ve goes straight to batt's terminals. Excuse my poor knowledge of elect circuits.

 

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[molecules]

Just anothrr quest, can the same setup be applied to the IU unit as well? Or its not necessary as the current the iu draws is negligible? Reason for asking cos at times my bike may stay unridden for a week or 2.

 

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[altya]

But connecting to fuze box usually means will have to extend e wire right?

[molecules]

But connecting to fuze box usually means will have to extend e wire right?

 

Yeah bro, i suppose need extension. Prolly some of the models out there have long enough wires?

 

Am actually looking at the koso slim ones....

[mudai]

for me. im tapping it from the brake lever sensor.. quite accurate i guess

[molecules]

for me. im tapping it from the brake lever sensor.. quite accurate i guess

 

Good to knw tat bro. Required any splicing? Or can just tuck the wires in between connectors?

[mudai]

I'm tucking the wire on the socket. I get the whole socket out from the rubber then put the cable in

[molecules]

I'm tucking the wire on the socket. I get the whole socket out from the rubber then put the cable in

 

Noted bro.

[molecules]

Any idea which fuse rating shd be used together with the volt meter?

[slappywoo]

would the voltage drop if passed through fuze? which method would get the most accurate reading?

[heysugar]

Try to get voltmeters that comes with 3 wires instead of 2, they usually gives a more stable and accurate reading.

 

The 3 wires are usually (RED) positive or power source. (BLACK) negative or ground and (BLUE, GREEN or WHITE depends on brand of the voltmeter) that is the signal.

 

I wired, RED to ignition fuse, BLACK to negative side on the battery and SIGNAL to the positive side of the battery.

 

Hope this helps!