×
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

Dimmer Question

Dimmer Question

Dimmer Question

(OP)
Hello, I need to build a dimmer for a 120v lamp. I cannot buy a dimmer because the area that I have is too small. I found a schematic that will work but I am too unfamiliar with TRIACs to know exactly what to buy. The schematic that I am interested in can be found here:

http://www.aaroncake.net/circuits/dimmer.htm

It says that I need a "40502 TRIAC" I'm not exactly sure what type of TRIAC that is. If this is a product number, please give me specs or guidance on what kind of Triac I should buy. Please help! Thanks.

-Sam Allen

RE: Dimmer Question

I'd say go buy a dimmer for $2.99, take it apart and repackage it.  Doubt you can find all these parts for even twice that price.  Most later circuits use a diac in place of the neon lamp or have this built into the triac.  This triac would be any generic triac rated at 400V and 4A. A Radio shack bubble pack triac with this voltage would likely work.   The gate of this triac may need to be a little more sensitive than most because of the neon trigger.

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