Timeline for run LEDs with cellphone charger
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 17, 2015 at 10:18 | comment | added | Russell McMahon♦ | Follow advice here BUT also do some reading on voltage, current, and resistors and "Ohms law". Once you understand the basics add LEDs. This learning will reward you many times over. If you just accept answers without understanding you will remain bemused, | |
| Jan 16, 2015 at 22:51 | answer | added | Peter Bennett | timeline score: 1 | |
| Jan 16, 2015 at 22:27 | comment | added | I. Wolfe | Are your LEDs in series or parallel? How many are there? By common type do you mean 5mm? What color are the LEDs?(I've found that forward voltages can vary quite a bit depending on LED color). Without knowing the LED specs (forward voltage and current rating) it's really just a guessing game. Choose a resistor that would work for a same color/size LED that you have specs for, and then adjust the value to get the right brighness/current. | |
| S Jan 16, 2015 at 22:08 | history | suggested | Jarrod Christman | CC BY-SA 3.0 |
Removed email, no need
|
| Jan 16, 2015 at 21:47 | answer | added | Mark Hadman | timeline score: 0 | |
| Jan 16, 2015 at 21:29 | comment | added | Jarrod Christman | What value of a resister did you use? LED's primarily operate via current. Resisters in series do drop some voltage, but it's primarily acting as a current limiter for an LED. We can guess, but it would be helpful to have some data on the LED's in question. Your resistor choice should be based on how much voltage you want to drop across the resistor to provide the LED with it's forward voltage (which in turn feeds it the proper current). | |
| Jan 16, 2015 at 21:27 | review | First posts | |||
| Jan 16, 2015 at 21:51 | |||||
| Jan 16, 2015 at 21:26 | review | Suggested edits | |||
| S Jan 16, 2015 at 22:08 | |||||
| Jan 16, 2015 at 21:25 | history | asked | Parosh Rahman | CC BY-SA 3.0 |