Re: ... LED hyperflash - Saabnet.com Bulletin Board


[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Performance | Detail | Clubs & SOC | Other Cars | Books Movies & Music | Chat | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Service/Mechs | Manuals | Polls | What's New | Raffle | Photo of the Month | Sponsors]

NG95 Bulletin Board
2010-2011
Search:
(Search Author's Posts: e.g. Keyword:Author)*Members Only


[Main NG95 Bulletin Board | Post Followup | BBFAQ ] [ Prev by Date ] [ Next by Date ] Member Login / Signup [Most Recently Edited Saabnet.com Photo Galleries]
Re: ... LED hyperflash
Posted by Stephen Goldberger [Email] (more from Stephen Goldberger) on Sat, 10 Jun 2017 04:56:39

In Reply to: Windshield replacement, LED hyperflash, saabsailor, Fri, 2 Jun 2017 12:11:03
Alert me when someone posts in this thread:

Interesting solution. hyperflash results from the absence of current flowing, and an LED uses what, an eighth of the current as an incandescent (halogen or nitrogen) of equivalent light output? So run the missing current to a second load, a resistor. Moving the heat from the bulb (which does a number on the light socket) to a resistor doesn't mean less heat, just heat in a hopefully less damaging place. But considering, the H21 halogen bulb dissipates, er, 21 watts. Taking some liberty by considering the duty cycle (call it 50%, or 10 watts), and guessing that the current threshold is something like half way between a fully functioning bulb (2 amps) and a burned out one (0), you'd need at least a 5 watt resistor. And be certain there's nothing combustible in the immediate vicinity of the resistor.

posted by 69.133.17...

Posts in this Thread:
Alert me when someone posts in this thread:

Post a Followup

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

Name: Member Login / Signup [Most Recently Edited Saabnet.com Photo Galleries]
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.
If you use GMail, follow these instructions from Google so that they appear in your regular inbox.

Subject:

Posting rules are simple - No for sale/wanted ads or live auctions may be here - use the classifieds.
You may not cross-post your message to multiple BBs.
Personal attacks, insults, or flaming are not allowed.
Site Members do not see any red text, inline ad links, skyscraper ads, box ads, nor anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the TSN Classifieds)
To add inline links to your post, use [link]http://www.domain.com/[endlink] or use the Optional fields below.
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] or use the Optional Image Link field below.


Optional Link: (e.g. http://www.saabnet.com/)
To promote your own Saab site here, you must have a link back to The Saab Network.
Link Title: (Optional)
Optional Image Link: (e.g. http://www.saabnet.com/img.jpg)




The content on this site may not be republished without permission. Copyright © 1988-2017 - The Saab Network - saabnet.com.
For usage guidelines, see the Saabnet.com Mission and Purpose Page.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

This is a moderated bulletin board - Posting is a privilege, not a right. Unsolicited commercial postings are not allowed (no Spam). Please, no For Sale or Wanted postings, SERIOUSLY. Classifieds are to be listed in The Saab Network Classifieds pages. This is a problem solving forum for over 250,000 Saab owners, so expect to see problems discussed here even though our cars are generally very reliable. This is not an anything goes type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the Saabnet.com Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP - Poverty2Prosperity.org | RandomScreening.com
Your address is: 54.167.194.4 - Using CCBot/2.0 (http://commoncrawl.org/faq/) - Logged.
Site Members do not see red text instructions, skyscraper, nor box ads.
Click here to see all the Site Membership Benefits!