×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Help: Halogen Lighting Circuit

Help: Halogen Lighting Circuit

Help: Halogen Lighting Circuit

(OP)
I'm trying to get a 12VDC 100W Halogen bulb to work.
(eiko 100w 12v h3 pk22s 01015)
Measuring across the electrodes, I noticed it didn't have
any resistance. My adjustable DC power supply sees it as a "short" (wire). I read that these bulbs increase in resistance as they warm up. Do I need some kind of ignitor to fire this thing?

Thanks,
Nodoubt

RE: Help: Halogen Lighting Circuit

You might consider starting the bulb with a lower voltage to keep the current well below the 9 amp continuous current and then ease the voltage up to the nominal.  This should slowly warm up the filament.

TTFN

RE: Help: Halogen Lighting Circuit

The resistance of the cold filament is very low and your powersupply is probably not able to give the staring current, the advice from IRstuff might work.

Why do you want to run it on DC, any 10A transformer will do the job.

Greetings Aksel

RE: Help: Halogen Lighting Circuit

(OP)
To make a long story short: We have a highspeed sprinkler test unit that we use to shine UV light at the Detector
and place prox sensors at the nozzle. When the light is energized, a timer is activated. Once the the water comes out the nozzle, it stops the timer; hence measuring the response time of your system. The UV bulb when lit, reads 170VDC.

We have an IR detector system as well. So the bulb I'm trying to get to work, does both UV/IR. Basically this bulb is a 12VDC automotive halogen.

Anyone have any circuits on these? I will keep digging.

Thanks,
Nodoubt

RE: Help: Halogen Lighting Circuit

If you have no resistance, are you sure your bulb is good? Just touching a Quartz-Halogen bulb can cause it to burn out, from the oil on your skin. I'm not familar with your bulb, but most automotive headlights are wired in parallel from the battery with nothing other than a relay. On newer cars the driving lights are in series with a module. I'm sure a shop that specializes in automotive electrics would be able to help you.

RE: Help: Halogen Lighting Circuit

I guess that the resistance is so low that a normal multimeter reads 0.

Greetings Aksel

RE: Help: Halogen Lighting Circuit

I would prefer to use UV and IR LED combination, if possible.  

If you must use halogen bulb, I suggest use AC temp.control in closed loop using external sensor
and SCR.
 

<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close