Ian writes – “This is a simple bike light which can be contructed with a minimum of tools. It is bright enough to be useful as a headlight, is fairly robust, and cheap to construct. It’s perfect for commuting and does a surprisingly good job for mountain biking too. The whole thing, including rechargeable batteries, weighs about 200g and will run for over two hours. “ – Link.
Related:
Other bicycle light projects – Link.
9 thoughts on “HOW TO – Build a simple Luxeon LED bike headlight”
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looks like the whole point with this project is to be able to measure and control via a pc. can’t understand the point with PIC, a couple of DACs/ADCs should be sufficient to both measure and controll, while the rest of the functions could have been implemented by simply programming the pc.
Here’s another version with USB support: http://www.music.mcgill.ca/~marshall/projects/avr-hid/.
It scopes 6 analog channels, and sends them to the PC through a standard joystick driver.
“can’t understand the point with PIC, a couple of DACs/ADCs should be sufficient to both measure and control”
the point/goal is simplicity/evolutivity/price:
The less components, the quicker/easiest it is to make. For ~ 3$ an Atmel AVR atmega8 give you plenty of IO, 6 ADC, internal oscillators, UART, etc. AVR are also quick enough for ADC(one instruction per cycle while Microchip PICs need 4 cycles)and obviously the firmware can always evolve to fit new needs.
Concerning Liberlab it also work well with a “USB to Serial cable”.