Timeline for Why are red LEDs so dim & how do I make them brighter?
Current License: CC BY-SA 3.0
17 events
| when toggle format | what | by | license | comment | |
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| Aug 3, 2021 at 18:00 | comment | added | Audioguru | Many parts sold on ebay are fakes or manufactures rejects that were thrown away and collected and sold on ebay by a cheating seller. Specs from a No-Name-Brand place are useless. | |
| Jun 11, 2020 at 15:10 | history | edited | CommunityBot |
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| May 14, 2012 at 21:08 | answer | added | Sky | timeline score: 3 | |
| May 14, 2012 at 18:06 | comment | added | Kevin Vermeer | I got them off of eBay from a Chinese manufacturer. There is not a brand name - This is 90% of your problem. Buy components from a reputable distributor like Digikey or Mouser and a reputable manufacturer like Cree or Kingbright, not ebay. | |
| May 13, 2012 at 8:30 | comment | added | Wouter van Ooijen | IME red leds are simply less efficient that comparable green leds. So you will simply have to dim the green ones. | |
| May 13, 2012 at 5:33 | vote | accept | Matt Cashatt | ||
| May 12, 2012 at 23:15 | history | tweeted | twitter.com/#!/StackElectronix/status/201450477177683972 | ||
| May 12, 2012 at 18:13 | answer | added | Russell McMahon♦ | timeline score: 12 | |
| May 12, 2012 at 17:22 | vote | accept | Matt Cashatt | ||
| May 13, 2012 at 5:33 | |||||
| May 12, 2012 at 17:14 | comment | added | Matt Cashatt | Thanks dextorb. I will work on a schematic (I have to go teach myself the symbols and all of that first). In the meantime, I posted specs for the LEDs. Also, I am simply running jumpers from Arduino straight to the breadboard. I am pretty sure that Arduino sends out 5v. Currently, I have no resistors or anything, just the LEDs plugged directly into the breadboard. Sorry for lack of detail/dumb comments. I am new to all of this. Thanks! | |
| May 12, 2012 at 17:14 | answer | added | Jay M | timeline score: 6 | |
| May 12, 2012 at 17:11 | history | edited | Matt Cashatt | CC BY-SA 3.0 |
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| S May 12, 2012 at 17:06 | history | suggested | m.Alin | CC BY-SA 3.0 |
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| May 12, 2012 at 16:57 | comment | added | dext0rb | You're saying no matter what LED or what value resistor you use, the red LEDs are always dimmer than the other LEDs? First, pick a single brand of LED. Then find out the specs of it from the datasheet. You need to know the forward voltage and how much constant current the LED can withstand. 20mA is a usual number, some peopled drive them lower for less power consumption/longer life. You need to eliminate some variables in your question, and also please post a schematic of how you have things connected. | |
| May 12, 2012 at 16:56 | review | Suggested edits | |||
| S May 12, 2012 at 17:06 | |||||
| May 12, 2012 at 16:51 | comment | added | Shamtam | What kind of LEDs are you using? What kinds of voltages/currents are you applying to these LEDs? Most likely, you just have low-intensity LEDs. | |
| May 12, 2012 at 16:36 | history | asked | Matt Cashatt | CC BY-SA 3.0 |