Timeline for 6x UV-leds in parallel turning on and off when they should be on all the time
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 3, 2012 at 8:03 | history | edited | stevenvh | CC BY-SA 3.0 |
added 1510 characters in body
|
| Aug 3, 2012 at 5:52 | comment | added | rzetterberg | @Kortuk Thanks for the additional information! I learned so much just asking this question. And I will certainly learn even more exploring the subjects raised by persons interacting with me via this question :) | |
| Aug 2, 2012 at 21:08 | comment | added | Kortuk | @rzetterberg it is probably due to random chance of how the circuit was working. Your original schematic only shows one resistor. Having Diodes in parallel is always a bad idea. Diodes heat and become more conductive. This means if one diode has a tiny bit more current(which one will) it will increase in conductivity and overheat. This might have been acting to your advantage. As one does this with the trickle current it suddenly takes all of the current available(nearly) and manages to light, it then overheats and shuts back off. This might damage the LED, probably R started heating. | |
| S Aug 2, 2012 at 13:40 | history | suggested | shimofuri | CC BY-SA 3.0 |
minor - added circuit diagram
|
| Aug 2, 2012 at 13:38 | review | Suggested edits | |||
| S Aug 2, 2012 at 13:40 | |||||
| Aug 2, 2012 at 11:49 | vote | accept | rzetterberg | ||
| Aug 2, 2012 at 11:49 | comment | added | rzetterberg | Alright, thanks for the tip. I will remember that next time! | |
| Aug 2, 2012 at 11:43 | comment | added | stevenvh | @rzetterberg - Fine! No, I wouldn't know what caused the problem in the first place either. Flux seems unlikely because I would expect that it was off all the time, certainly not switching. Anyway, I always try to exclude all possible uncertainties before starting troubleshooting. In general you'll find the solution faster if there's just one problem than when there's different ones which may affect each other. | |
| Aug 2, 2012 at 11:31 | comment | added | rzetterberg | I changed the circuit per your suggestion. It works perfectly. Much brighter and more evenly distributed. However the reason of the problem is still unknown. I tried both circuits on my breadboard, and the problem was not reproduced. Could flux disturb the flow in the circuit? Because I didn't do a good job cleaning the soldered circuit. | |
| Aug 2, 2012 at 8:35 | comment | added | rzetterberg | Thank you for the answer. I will implement these changes and edit my answer if the problem persists! | |
| Aug 2, 2012 at 8:14 | history | answered | stevenvh | CC BY-SA 3.0 |