Go Back  Bike Forums > Bike Forums > Electronics, Lighting, & Gadgets
Reload this Page >

Shimano DH-3N70/71 voltage limiter?

Notices
Electronics, Lighting, & Gadgets HRM, GPS, MP3, HID. Whether it's got an acronym or not, here's where you'll find discussions on all sorts of tools, toys and gadgets.

Shimano DH-3N70/71 voltage limiter?

Old 06-17-08, 11:33 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Jun 2007
Posts: 168
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Shimano DH-3N70/71 voltage limiter?

I just received this new generator wheel the other day and plan to power several leds in series. Does this hub have any voltage limiter in it that would prevent full power to the leds? If so, is it removable?

Also, the choices for LED diy are truly mindboggling.

TIA.
snowranger is offline  
Old 06-17-08, 11:44 PM
  #2  
Zoom zoom zoom zoom bonk
 
znomit's Avatar
 
Join Date: Sep 2006
Location: New Zealand
Posts: 4,623

Bikes: Giant Defy, Trek 1.7c, BMC GF02, Fuji Tahoe, Scott Sub 35, Kona Rove, Trek Verve+2

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 549 Post(s)
Liked 721 Times in 365 Posts
They are fine running LEDs, no voltage limiting zenner, I have the 70 on my MTB (4LEDs) and 71 on the road bike (3LEDs). Both work fantastically!

See pilom.com for circuits, see my sig for build details.
znomit is offline  
Old 06-18-08, 07:53 AM
  #3  
Senior Member
Thread Starter
 
Join Date: Jun 2007
Posts: 168
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks, that's good too know. And also, thanks for the links in your sig. I'll study them.

I'm thinking about 3 in series, 2 for the front and 1 for the rear.
snowranger is offline  
Old 06-19-08, 08:29 AM
  #4  
Scott
 
n4zou's Avatar
 
Join Date: Jun 2006
Posts: 2,393

Bikes: Too Many

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Heres my DIY dynamo powered LED headlight.



10 degree narrow lens on the left and 15X30 degree elliptical on the right.


bridge rectifier and 1000uF capacitor on perf board. Note the copper straps to leach heat from the copper sheet mounted LED's into the aluminum housing. I used a common aluminum electrical outlet box and plastic cover so it's all water proof. There is a clear plastic sheet between the front cover and gasket keeping everything tightly sealed. This light produces an exceptionaly good pattern and it's as bright as a 20 watt MR-16 halogen light setup due to the optics used with the SSC P4 Z-power LED's.

I just use a standard blinkie as a taillight. The batteries last for 200+ hours and I don't care to run wires from the dynamo to a light on the rear. You would still need a blinkie on the rear to compensate for stops when your dynamo taillight would quit working. Also note my use of an amber blinkie up front so I can be seen by others when stopped at a traffic light or sign.

Last edited by n4zou; 06-19-08 at 08:39 AM.
n4zou is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.