Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.JOHN J
10-24-08, 09:31 AM
hello everyone, Happy heating season
well I just finished up a Home brew LED light and it came out fine. I originaly machined a housing but in the end used a Stainless suger shaker that was a bit larger.
with help from some of you here I was directed to pilom for circuit ideas and wa la a light was born.
I used 3 cree Q5 from deal extreme (good thing I ordered 4 as I had a bad one).
I oringinaly used the voltage doubler circuit for 3 leds as I wanted more light at low speed. the voltage doubler worked ok but on my 3rd ride the light failed , 2 caps were bad.
so I then re wired the light using the standard circuit with lots of UF to get rid of flicker NOT BAD!
the first light works fine , lots of light! a bit different from the fancy very tuned german optics I was used to but way more light over a larger area and no more black hole in front of my wheel.
this next light will be in the same size suger shaker except ill fabricate it much neater /lighter.
im playing with 2 options
1) 3 or 4 led ?? with the voltage doubler again
2) 2 seperate circuits 1 or 2 LED ?for slow speed / group riding, /city riding ,wider beam oval or 15-25 deg.
the second circuit with 3 or 4 LEds 5-10 deg optics for when on dark unlit backroads or MUP at night....
Im leaning towards #2 as there is plenty of room in the suger shaker and with 2 seperate circuits I'LL have a back up light.(REDUNDANCY IS GOOD) ID USE A ON OFF ON SWITCH.
yOUR bRIGHT iDEAS pLEASE!!! What one would you do???
happy spinning
"john"
well I just finished up a Home brew LED light and it came out fine. I originaly machined a housing but in the end used a Stainless suger shaker that was a bit larger.
with help from some of you here I was directed to pilom for circuit ideas and wa la a light was born.
I used 3 cree Q5 from deal extreme (good thing I ordered 4 as I had a bad one).
I oringinaly used the voltage doubler circuit for 3 leds as I wanted more light at low speed. the voltage doubler worked ok but on my 3rd ride the light failed , 2 caps were bad.
so I then re wired the light using the standard circuit with lots of UF to get rid of flicker NOT BAD!
the first light works fine , lots of light! a bit different from the fancy very tuned german optics I was used to but way more light over a larger area and no more black hole in front of my wheel.
this next light will be in the same size suger shaker except ill fabricate it much neater /lighter.
im playing with 2 options
1) 3 or 4 led ?? with the voltage doubler again
2) 2 seperate circuits 1 or 2 LED ?for slow speed / group riding, /city riding ,wider beam oval or 15-25 deg.
the second circuit with 3 or 4 LEds 5-10 deg optics for when on dark unlit backroads or MUP at night....
Im leaning towards #2 as there is plenty of room in the suger shaker and with 2 seperate circuits I'LL have a back up light.(REDUNDANCY IS GOOD) ID USE A ON OFF ON SWITCH.
yOUR bRIGHT iDEAS pLEASE!!! What one would you do???
happy spinning
"john"