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BusterGonads |
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BusterGonads Trackday Trickster
Joined: 18 May 2018 Karma :
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blurredman |
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blurredman World Chat Champion
Joined: 18 Sep 2010 Karma :
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Posted: 13:00 - 07 Jun 2018 Post subject: |
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Happened to me on my MZ 250.
Standard Tungsten 40/45 bulb.
Started it up in the night for a ride, lights on, then i thought I would test both beams and realised the beams didn't change.
Opened it up to find the low beam prong had fused with the high beam prong, by somehow bending towards it.
Thought it was cool. ____________________ CBT: 12/06/10, Theory: 22/09/10, Module 1: 09/11/10, Module 2: 19/01/11
Past: 1991 Honda CG125BR-J, 1992 (1980) Honda XL125S, 1996 Kawasaki GPZ500S.
Current: 1981 Honda CX500B - 91k, 1987 MZ ETZ250 (bored to 295cc) - 38k, 1990 MZ ETZ251 - 49k, 1979 Suzuki TS185ER - 9k, 1973 MZ ES250/2 - 17k. |
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Islander |
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Islander World Chat Champion
Joined: 05 Aug 2012 Karma :
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Posted: 13:01 - 07 Jun 2018 Post subject: |
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Bulbs can fail short circuit. |
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wristjob |
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wristjob World Chat Champion
Joined: 30 Sep 2005 Karma :
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Kris |
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Kris World Chat Champion
Joined: 03 Feb 2002 Karma :
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Posted: 17:56 - 07 Jun 2018 Post subject: |
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Yep had similar with a stop/tail bulb which was permanently on due to filaments touching.... which of course I found after dismantling the back end of the bike... ____________________ NSR125RR - ZXR750H1 - ZX9R E1 - GSF600S - GSF600SK3 - VFR400-NC30 - SV1000N - ST1100-R - CBR900RR-R - GSF1200SK5 - GSF600SK1 - VFR1200FA - GSXR1000K2 - ZZR1400 D8F
www.prisonplanet.com |
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BusterGonads |
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BusterGonads Trackday Trickster
Joined: 18 May 2018 Karma :
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Posted: 18:26 - 07 Jun 2018 Post subject: |
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Thanks for teh confirmation that this does happen. Ive just never seen it before.
Put an order into WEMOTO this morning and the new bulbs are on teh way. I've ordered two headlamp bulbs, a stop and tail and a spare indicator bulb.
I have a hankering to make the headlight LED. I know the headlights on the CG are AC and LEDs need a DC supply, but it is easy to make a rectifier out of a few diodes of suitable power rating. They cost pennies really and a nice 100uf capacitor would be needed too. I could knock up a 50 Watt rectifier for a very small number of doubloons...
I would only need 4 of these but they come in a pack of ten for £4.10
https://uk.rs-online.com/web/p/rectifier-schottky-diodes/7514843/
I have suitable capacitors lying about and the whole thing would easily fit into the space at the back of the headlight.
Circuit:
https://www.elprocus.com/wp-content/uploads/2015/01/21.jpg |
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
Joined: 16 Aug 2013 Karma :
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BusterGonads |
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BusterGonads Trackday Trickster
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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Islander |
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Islander World Chat Champion
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WmY |
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WmY Renault 5 Driver
Joined: 21 May 2018 Karma :
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Posted: 23:38 - 07 Jun 2018 Post subject: |
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(quotes munged):
I'd never come across before. It does explain why 240v bulbs have a fuse in them though....[/quote]
And why incandescent bulbs occasionally trip a breaker when they fail.
I've never seen a 240V incandescent with a fuse, or short-circuited. They tend to draw large currents when the plasma generated as the filament breaks, and an arc is thus sustained which throws "modern" MCBs. Occasionally splashes of hot metal will melt themselves into the bulb's glass, like angle-grinder sparks. |
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WD Forte |
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WD Forte World Chat Champion
Joined: 17 Jun 2010 Karma :
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Posted: 00:50 - 08 Jun 2018 Post subject: |
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tony1951 wrote: | Thanks for teh confirmation that this does happen. Ive just never seen it before.
Put an order into WEMOTO this morning and the new bulbs are on teh way. I've ordered two headlamp bulbs, a stop and tail and a spare indicator bulb.
I have a hankering to make the headlight LED. I know the headlights on the CG are AC and LEDs need a DC supply, but it is easy to make a rectifier out of a few diodes of suitable power rating. They cost pennies really and a nice 100uf capacitor would be needed too. I could knock up a 50 Watt rectifier for a very small number of doubloons...
I would only need 4 of these but they come in a pack of ten for £4.10
https://uk.rs-online.com/web/p/rectifier-schottky-diodes/7514843/
I have suitable capacitors lying about and the whole thing would easily fit into the space at the back of the headlight.
Circuit:
https://www.elprocus.com/wp-content/uploads/2015/01/21.jpg |
I reckon you'll need to regulate it as well as rectify it
and use a heat sink as well ____________________ bikers smell of wee |
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BusterGonads |
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BusterGonads Trackday Trickster
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WD Forte |
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WD Forte World Chat Champion
Joined: 17 Jun 2010 Karma :
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Posted: 16:11 - 08 Jun 2018 Post subject: |
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I've doing similar rectumfrying and bodgineering on a wee mobylette recently
here for gory details
https://www.bikechatforums.com/viewtopic.php?t=324407
and the voltage can easily go above 18V even on that puny little thing
so I'd suggest some testing before using your new leds on it
I half wave rectified and built a 6VDC reg/rec to run leds on it which work pretty well but as they use a fraction of the current bulbs do
you may need to dissipate some of unwanted powah ____________________ bikers smell of wee |
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 17:42 - 08 Jun 2018 Post subject: |
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It is possible that an LED headlamp designed for POSITIVE EARTH systems would work with AC lighting.
I intend to do some experiments on this myself in due course. Could work out as an expensive experiment if it goes pop though because the bulbs are around £50 each. I will be using a 12v AC regulator on my AC side.
There is no need to make your own rectifier. You can buy one. Almost all bikes have a reg/rec fitted, most have have three input phases but will work fine with just one or two of them. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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Islander |
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Islander World Chat Champion
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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WmY |
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WmY Renault 5 Driver
Joined: 21 May 2018 Karma :
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BusterGonads |
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BusterGonads Trackday Trickster
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bikenut |
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bikenut World Chat Champion
Joined: 21 Nov 2011 Karma :
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Posted: 11:03 - 09 Jun 2018 Post subject: bulbs |
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Normal bulbs are still used. the cops use the info of/in them all the time in crash investigations, maybe they will "interrogate" ecu's these days........?
The lads bike tended to blow the main fuse quite regularly........I noticed he tended to "attack" speed bumps, and always rode with the headlights on.
My bike, the same model, didn't blow main fuses at all, but I tended not to attack speed bumps........
Anyways, after consulting the wiring diagram and a cuppa, 2 and 2 made 5 !
The headlamp bulb in both bikes was a 410.
The filament support/connection wires in the bulbs, when the bulb is on, get hot. Add a speed bump and then they "bend".
They bend to such an extent that the internal "live " support connection wire touches the earth ( or vica versa I cant remember which now ) and hay presto, the fuse blows.
Since the bulbs where upgraded to the 65w 410 fitting type, this problem no longer happens, the wiring ( which is what the fuse protects remember ) is well able to take the increased load placed on it.
So can bulbs short circuit ?
yes.
They can even fail during an mot test after having been checked and checked and finally check half an hour before the test !
shit happens. ____________________ nuts about bikes |
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WmY |
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WmY Renault 5 Driver
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Tamsin |
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Tamsin World Chat Champion
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BusterGonads |
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BusterGonads Trackday Trickster
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WmY |
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WmY Renault 5 Driver
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Old Thread Alert!
The last post was made 5 years, 317 days ago. Instead of replying here, would creating a new thread be more useful? |
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