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Light intensity distribution (LID) of a lamp can be measured by taking wall/ceiling beamshots with a digital camera. The scripts process jpgs images (that have to be processed from raw data) and visualize the LID nicely.
Driver: Linear, using AMC7135 and Atmel AVR ATtiny45, Li-Ion battery powered. The firmware provides convenient control - bikelight-specific.
Below are firmware features
Features
- Multi-tasking: can do everything simultaneously: blink the info-LED, change brightness of the power LED, handle buttons presses
- Convenient Far/Near modes changing (e.g., to not blind oncomers). For example, press three times on left button to turn Far+High lights off - useful when approaching kids, or when riding on bumps when the Far beam rocks wildly up and down. Press three times on right button - Far+High are back on
- For a given Far and Near tilt angles (optimal for given speed/terrain), their (Far/Near) relative brightness difference can be adjusted, to make the illumination more uniform
- Monitors voltage level: there are many levels at which headlight will blink to indicate voltage drop
- Monitors temperature
- Levels can be set by the user without re-programming
- Strobe - makes a great signal
- Smooth light up/down
- Key lock mode (or anti-hijack): headlight requires a password
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