dynamis_dk
- Jan 27, 2010
- 5
- Joined
- Jan 27, 2010
- Messages
- 5
Firstly hi everyone - another electro-noob joining in
I'm making a PCB to backlight some temprature dials in a car to replace the poor lighting effect you get just replacing the bulbs.
I've worked out i need 15 LED's to light each section of the dial so my plan was to have 5x sets of 3 LED's in series each with a resistor. Problem has come to light when i've looked up the voltage requirements for each LED. The blue LED's (13 of the 15) are all 3.0-3.2 but the remaining 2 LED's are red which use 2.0-2.3v.
Would i be best off redisigning the PCB layout to have the 2 Red LED's running on there own with a bigger resistor, or running all the LED's at 2v, 3 in each group with a resistor in each group??
If it helps i can upload an image of the PCB i've worked on so far.
I've never done this before other than swapping LED's over in existing hardware (i.e. keyboard LED's, siwtch LED's in cars etc) so be nice with me Haven't done anything electronics theory based since school
I'm making a PCB to backlight some temprature dials in a car to replace the poor lighting effect you get just replacing the bulbs.
I've worked out i need 15 LED's to light each section of the dial so my plan was to have 5x sets of 3 LED's in series each with a resistor. Problem has come to light when i've looked up the voltage requirements for each LED. The blue LED's (13 of the 15) are all 3.0-3.2 but the remaining 2 LED's are red which use 2.0-2.3v.
Would i be best off redisigning the PCB layout to have the 2 Red LED's running on there own with a bigger resistor, or running all the LED's at 2v, 3 in each group with a resistor in each group??
If it helps i can upload an image of the PCB i've worked on so far.
I've never done this before other than swapping LED's over in existing hardware (i.e. keyboard LED's, siwtch LED's in cars etc) so be nice with me Haven't done anything electronics theory based since school