djsfantasi
- Joined Apr 11, 2010
- 9,156
...Which implies that after a “while”, the panel stopped functioning and no longer functions.The light panel did function for a while, and the LEDs are white.
Is this correct? Have you gotten any light from the panel since? Have you considered that the LEDs may have been destroyed?
Have you been able to test the strip since?
Secondly, your posted picture looks like each LED has a current limiting resistor. So it should operate with a 5V supply. Assuming the 3W rating, all LEDs are drawing 0.6A. You could divide by the total number of LEDs to obtain the operating current of one LED. Then you could calculate the inline resistor value. But you don’t need to do that.
Your pot must be rated for more than 3W or 0.6A. At 100% (wiper to panel connection = 0 Ohms), the panel should be bright. Then, turn the pot down to the lowest level of light you need. The wiper to connection resistance is the resistance you need for your pot (which is rated at 3W.) You don’t need a second pot nor additional resistors, unless you also want to set a maximum brightness.