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4hv.org :: Forums :: General Science and Electronics
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Need help with LED lights on ATV

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bomber315
Wed Sept 06 2017, 11:45PM
bomber315 Registered Member #43257 Joined: Thu Feb 20 2014, 03:53PM
Location:
Posts: 33
ok here is another video of what i have and a picture of my settings...
video: Link2


1504741536 43257 FT180497 Img 20170906 192741088 Hdr
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radiotech
Thu Sept 07 2017, 08:47AM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
Suggest you find a bridge rectifier. Connect the AC input, to the connection that went to the incand bulb.
Use a fuse in series with one wire, same size as bike headlight fuse.

Don't worry about polarity. Now connect a capacitor to the DC terminals of the rectifier. 1000uF/ 16 volt
might do. Now get a 12 volt regulator, (7812 ? ) . Wire the output of the regulator, to the LED.
Nothing of this added system is to ground to the bike.

If the ATV is for road use, your modification to LED, is probably in violation of vehicle approved
lighting standard.
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bomber315
Thu Sept 07 2017, 12:18PM
bomber315 Registered Member #43257 Joined: Thu Feb 20 2014, 03:53PM
Location:
Posts: 33
radiotech wrote ...

Suggest you find a bridge rectifier.
If the ATV is for road use, your modification to LED, is probably in violation of vehicle approved
lighting standard.

component 2 in the diagram is a rectifier/ regulator. are you saying it isn't sufficient? i already have dc going to the lights and to the battery to charge it.

it is for offroad use, unfortunately atvs are not not allowed on public roads where i live
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radiotech
Thu Sept 07 2017, 07:04PM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
On the face of the problem is a 'power source' capable of properly lighting an incand
lamp, (12 volt). Other than that, it destroys your led modules.

The bridge rectifier will standardize the DC or, DC + AC, voltage to DC with known polarity
even of the input is reversed.

Capacitor and regulator will give you 12 VDC.

If a transient exists, it may destroy the bridge, capacitor, and regulator, and blow the fuse you
have in series. Cheaper than the led module.

I am sure the lighting system on your bike was not designed by the Lucas Electric Company.

(known by British motorcyclists, as the Prince of Darkness) amazed

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Conundrum
Sun Sept 10 2017, 11:25AM
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Might be worth adding some parallel protection inline, these LED boards are infamous for beging picky.
A simple zener, parallel 25V rated capacitor (in case of accident) and series fusible resistor of maybe 2.2 ohms should be fine.
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