Login
or
Register
Subscriber & Member Login
Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!
Login
Register
Home
»
Model Railroader
»
Forums
»
General Discussion (Model Railroader)
»
How many wall warts?????
Edit post
Edit your reply below.
Post Body
Enter your post below.
<p>Guys,</p><p> Let's be specific about the effects of wiring the LEDs in series or parallel. (Jim B I think you meant no additional voltage concern if they are wired in parallel. Series would be back to back to back, etc, rather than all off common anode and cathode. Or do I have it backwards? <span class="smiley">[xx(]</span>)</p><p>You can run a h*ll of a lot more than 8 LEDs off of a 12V wall wart.</p><p>Here's a pic of my industrial complex with something like 25 LEDs, all on 1 small wall wart:</p><p> [img]http://www.ironpeng.com/pics/herc_ph1_03.jpg[/img]</p><p>Or my shop with 6 LEDS off of 2 AA batteries (3V) Note the common wiring - all black wires together, all white wires common. (JIm B - parallel or series ? <span class="smiley">[:D]</span>)</p><p><a href="http://www.ironpeng.com/pics/ef/ef06.jpg[/img]">[img]http://www.ironpeng.com/pics/ef/ef06.jpg[/img]</a></p><p> </p><p>The real factor in the number of LEDs you can run off a power supply is the amperage of your pwer supply. Each LED uses about 20 mA (milli-amps) and they add up. But if wired parallel, the voltage "drop" isn't really relevant. </p><p>Another factor IS the draw of each LED compared to another wired with it. LEDs don't share amps nicely and the highest drawing LED will hog amperage, preventing other LEDs in the same circuit from lighting. In the complex above, the yellowish LEDs are wired separate from the white Surface Mounts, which are separate from the white T1's. But they are all off of the same 12v wall wart.</p><p> </p><p>Mike Tennent</p>
Tags (Optional)
Tags are keywords that get attached to your post. They are used to categorize your submission and make it easier to search for. To add tags to your post type a tag into the box below and click the "Add Tag" button.
Add Tag
Update Reply
Subscriber & Member Login
Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!
Login
Register
Users Online
There are no community member online
Search the Community
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT
Model Railroader Newsletter
See all
Sign up for our FREE e-newsletter
and get model railroad news in your inbox!
Sign up