Jump to content

Source for LEDs


timmythecop

Recommended Posts

I am (slowly) working on secret project X. That is, I am making a 70's VFR, sorta. See one of my "other bikes" is a GS 850. These bikes were loved by the sport touring set in the 70s and 80s for much of the same reasons we love our VFRs. So anyway, one of the things I am doing is hanging a set of Bates saddlebags on it. You can see here that there are two reflector thingies on the back. They are like empty marker lights and the lenses screw off to reveal a shallow area behind with a flat piece of metal in there.

40.jpg

I plan on using the top ones as additional brake lights, and the botom two as turn signals. I want to use LEDs in there because space is limited. Now, because I am not familiar with LEDs, I was wondering if anyone knows of a good source for LED componants. The wiring will be very straight forward but I dont know where to find a cool round, flat fella and/or if there are varying brightnesses for each application. I know I can use Ebay, but that brings a flood of crap for a Honda Civic and useless turn signal bulbs.

Any help?

Link to comment
Share on other sites

That's a pretty wide question.

A little background:

LEDs have a characteristic forward voltage drop of 2.5-3.0V (the high efficiency white type) and have a power limit of 1 watt, which translates to about 300mA of current. To be used in a 12V system you need to limit the current/power with a resistor. If you use 1 LED and resistor (you'll need about 50 ohm/5W and a modest heatsink/cooler for the LED), this will result in a lot of wasted power and a really hot resistor. Better to put 3 LED in series and use a 50 ohm/1W resistor. The lightbulb replacement LEDs have already put the right amount of devices in series/parallel along with the limiting resistor, that is one reason they are 'kinda bulky'.

As far as buying individual LEDs and resistors, try DIGIKEY.com. They aren't the lowest price in the world, but you can buy onesy twosey's and they deliver.

Of course if you have no technical background (as in electronics) I may have just wasted a couple of minutes of your time.

Brian

Link to comment
Share on other sites

Of course if you have no technical background (as in electronics) I may have just wasted a couple of minutes of your time.

Brian

I did mention this was for a GS850, right? You sent me information in regard to the Space Shuttle. :rolleyes:

What I need is a 2 inch wafer with as many LEDs as will fit and a pigtail.

Link to comment
Share on other sites

How bright do you want them to be? I built a 650 lumen flashligh that uses 1W LEDs that are on a star heatsink. I have used the crappy 5mm LEDs for things as well...the difference is night and day. It doesn't sound like there is a socket in there, you just want a 2" round circuit board with LEDs?

I would go with Superbright LEDs in that case. You have to figure out how many LEDs you can fit, then use this link to determin the needed resistors and how to wire them: http://led.linear1.org/led.wiz. You need to know the forward voltage (3.5V is common) and milliamps (20ma is common).

Link to comment
Share on other sites

  • 11 months later...
  • Member Contributer

I don't remember seeing this thread when you first started it, but thanks for bringing it back from the dead. Now I have an excuse to post this pic. I've been seeing this GS850 around work lately. I work at a college and my guess is it's some student's dad's that was sitting in the garage for a while. It's only got about 6k miles on it.

GS850G

Link to comment
Share on other sites

  • Member Contributer

Nice bike Timmy. Not exactly the same bike but I still have a memory flash of a banana yellow GS750 Super Sport at the dealer that I lusted after when I was a kid. Man did I ever want one.

Link to comment
Share on other sites

  • 1 month later...
  • Member Contributer

What I need is a 2 inch wafer with as many LEDs as will fit and a pigtail.

There's bunches of trailer clearance lights in LED these days. Prolly simpler than making your own, and no math :tongue: .

http://www.etrailer....s-hs-Round.aspx

Glenn

Mr. Cop - who made that fairing - Vetter? It's incredible.

Hannigan?

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...

Important Information

By using this site, you agree to our Privacy Policy.