Dieselcustoms
Newly Enlightened
- Joined
- Jan 9, 2014
- Messages
- 1
Hi everyone! I am new to this site and the LED world but I do have some basic DC electrical knowledge. I am in to mnt biking and bikepacking which finds me using Lights quite a bit. I recently bought a cheap chines headlight http://www.amazon.com/gp/product/B006QQX3C4/?tag=cpf0b6-20
After one ride under the rain I rained the batter pack, my fault the pack was not water proof and had I looked at it carefully I would have notice it. It's cheap enough I could just buy another but I like tinkering and think this would be a fun project. I want to make a lithium battery pack for it which the original one from the reviews I read is rather bad. First however I need to learn more about Led so here are my questions:
1-Is there a book or preferably something online that I can read to give me basic knowledge on Led torches and how to design a system? I read the post Beginners guide to explain simple LED flashlight but while it was a great start I need more info.
The specs on that system states it's a 8.5v with 4 X 18650 batteries giving a 4400mAh pack. The Led spec is a XM-L T6 LED but after opening the light I found CREE XML-U2 marked on the LED.
2-How can it be 8.5V if it has 4 batteries and each cell is 3.7V? A pack with 4 3.7V can only be configure to give 7.4V or 14.8, so is the driver board stepping the Voltage down or up?
3-In the pack there is a small circuit board, is this the driver board? If not what is it and is the driver board located inside the light housing?
Thanks in advance for ur help
After one ride under the rain I rained the batter pack, my fault the pack was not water proof and had I looked at it carefully I would have notice it. It's cheap enough I could just buy another but I like tinkering and think this would be a fun project. I want to make a lithium battery pack for it which the original one from the reviews I read is rather bad. First however I need to learn more about Led so here are my questions:
1-Is there a book or preferably something online that I can read to give me basic knowledge on Led torches and how to design a system? I read the post Beginners guide to explain simple LED flashlight but while it was a great start I need more info.
The specs on that system states it's a 8.5v with 4 X 18650 batteries giving a 4400mAh pack. The Led spec is a XM-L T6 LED but after opening the light I found CREE XML-U2 marked on the LED.
2-How can it be 8.5V if it has 4 batteries and each cell is 3.7V? A pack with 4 3.7V can only be configure to give 7.4V or 14.8, so is the driver board stepping the Voltage down or up?
3-In the pack there is a small circuit board, is this the driver board? If not what is it and is the driver board located inside the light housing?
Thanks in advance for ur help