Scratch
New Member
I am building a light using High Intensity LED's (if anyone remembers me, I'm re-doing my emergency flasher lights).
I have 18 LED's and I don't know what size, and how to position the resistors. I will be using 12VDC to power them. I have thought of three ways:
1. Wire all 18 LED's in parallel using one resistor at the end of the line.
2. Wire 6 LED's in parallel with a resistor at the end of those six, and having the 3 sets of six all in parallel with my 12VDC.
3. Wire a single LED, and a resisitor in series with it, and have all 18 LED/resistors in parallel with the 12VDC.
I know that it would make a cleaner circuit if I use option 1 but when I try it, the LED's are not as bright. I am probably not using the correct value resistor though, just digging through my junk. My thought is that all three options would work but I would have to compensate in resistance to keep the same brightness for all three options, if that is correct, then it's an issue of how many components I want on the board right.
If that is true, what values of resistors do I need. The only rating I have for the LED's are 5 mm, 3000 mcd, from All Electronics Corporation.
I have 18 LED's and I don't know what size, and how to position the resistors. I will be using 12VDC to power them. I have thought of three ways:
1. Wire all 18 LED's in parallel using one resistor at the end of the line.
2. Wire 6 LED's in parallel with a resistor at the end of those six, and having the 3 sets of six all in parallel with my 12VDC.
3. Wire a single LED, and a resisitor in series with it, and have all 18 LED/resistors in parallel with the 12VDC.
I know that it would make a cleaner circuit if I use option 1 but when I try it, the LED's are not as bright. I am probably not using the correct value resistor though, just digging through my junk. My thought is that all three options would work but I would have to compensate in resistance to keep the same brightness for all three options, if that is correct, then it's an issue of how many components I want on the board right.
If that is true, what values of resistors do I need. The only rating I have for the LED's are 5 mm, 3000 mcd, from All Electronics Corporation.