I just finished a couple of Cigar Box amps. Everything went well until I soldered the LED leads. I bought 2 prewired kits from Gitty. I checked the the leads with an ohm meter and had good continuity from the circuit board to the ends of the lead. Neither one of the LED's lit up when I turned on the switch. The amps both work well although not to loud. I can't figure out why the LED's don't lite. Take a look at the picks. Any help would be great

Views: 846

Reply to This

Replies to This Discussion

you had it right:  depending on the the LED type, it will operate at a voltage drop of anywhere from 1.7v for dim red LEDs to 4.5v for bright white LEDs (check your spec sheet) and you need the resistor to drop the rest of the voltage  (wired in series) or else you get a wonderful one-shot flashbulb-LED and then all the magic smoke will leak out.

A lot of LED's have a flat spot next to one leg. That's the Cathode. I could never remember what that meant until somebody pointed out that Cat's are negative... So Flat spot to ground.

John

Cool Amp!

Just as an added note, though they are cheap you can salvage LEDs out of old junk appliances and save some change.

RSS

The Essential Pages

New to Cigar Box Nation? How to Play Cigar Box GuitarsFree Plans & How to Build Cigar Box GuitarsCigar Box Guitar Building BasicsCigar Box Guitar Parts Store

Site Sponsor

Recommended Links & Resources


Forum

Box thickness effect on sound

Started by Infirmity Citrus President in Building Secrets, Tips, Advice, Discussion. Last reply by Taffy Evans Jul 31. 3 Replies

Ghost pickup

Started by Michael shrader in Performances, How to Play, Lessons, Concerts. Last reply by Taffy Evans Jul 29. 5 Replies

Files download

Started by David Herrera in Performances, How to Play, Lessons, Concerts. Last reply by Timothy Hunter Jul 14. 9 Replies

The Cigar Box SITAR Experiment - by Shane Speal

Started by Cigar Box Nation in Feature Articles. Last reply by t-belly johnson Jun 16. 2 Replies

Latest Activity

bemuzic commented on bemuzic's video
Thumbnail

This Song Isn't True - Busking & Live Looping w 3 String Cigar Box Guitar in St Ives, Cambs

"Thanks Digly, I was surprised when they put some money in. I do have a board with a QR code on it…"
3 hours ago
bemuzic commented on bemuzic's video
Thumbnail

This Song Isn't True - Busking & Live Looping w 3 String Cigar Box Guitar in St Ives, Cambs

"thanks Robert, ah yes I was trying out things in Power Director 20, having recently upgraded from a…"
3 hours ago
Steve Holladay posted a video

Clifftop 2022 - got a little bluezy!

These 2 stopped by my campsite beside "The Swamp" at Clifftop for a while. Turns out they are David and Nancy from Roots 2 Music.https://root2music.com/home...
6 hours ago
BrianQ. liked Doug Thorsvik's video
6 hours ago
Doug Thorsvik posted a video
6 hours ago
BrianQ. left a comment for Spencer Wadsworth
"Welcome, check out the Resources tab for build/play info and join some groups located in the Posts…"
7 hours ago
Howard Craypool commented on Howard Craypool's photo
Thumbnail

Neck

"Thank you, where do you thing would be a good spot for the piezo, never installed one.! Thank you"
9 hours ago
Howard Craypool commented on Howard Craypool's photo
Thumbnail

Tuning head

"Yes, on this cigar box I added a canninite (pipe stone) for the nut"
9 hours ago
Diglydog commented on bemuzic's video
Thumbnail

This Song Isn't True - Busking & Live Looping w 3 String Cigar Box Guitar in St Ives, Cambs

"Nice one, Belinda.  Great to see the kids enjoying the music and giving you some cash. …"
9 hours ago
Robert Neal commented on bemuzic's video
10 hours ago
Profile IconSpencer Wadsworth, Andrew Webb, Christina La France and 4 more joined Cigar Box Nation
10 hours ago
Carl Floyd replied to Paul Craig's discussion What's on your workbench?
"I noticed that years ago on mine LP case, Taff.   I folded a piece of cloth in the area…"
12 hours ago

Events

Music

© 2022   Created by Ben "C. B. Gitty" Baker.   Powered by

Badges  |  Report an Issue  |  Terms of Service

\uastyle>\ud/** Scrollup **/\ud.scrollup {\ud background: url("https://storage.ning.com/topology/rest/1.0/file/get/963882636?profile=original") no-repeat scroll 0 0 transparent;\ud bottom: 25px;\ud display: inline !important;\ud height: 40px;\ud opacity: 0.3 !important;\ud position: fixed;\ud right: 30px;\ud text-indent: -9999px;\ud width: 40px;\ud z-index: 999;\ud}\ud.scrollup:hover {\ud opacity:0.99!important;\ud}\ud \uascript type="text/javascript">\ud x$(document).ready(function(){\ud x$(window).scroll(function(){\ud if (x$(this).scrollTop() > 100) {\ud x$('.scrollup').fadeIn();\ud } else {\ud x$('.scrollup').fadeOut();\ud }\ud });\ud x$('.scrollup').click(function(){\ud x$("html, body").animate({ scrollTop: 0 }, 600);\ud return false;\ud });\ud });\ud \ua!-- End Scroll Up -->