RGB LED Light

[Dzambaz]

Hi,

Few weeks ago I finished making an RGB LED light, which I would describe here as a general purpose LED light with a separate control over the red, the green and the blue light output, with no dimming capability and a potential to be used in videography or experimental photography. The design is rather simple and it is suitable as a project for educational purposes.
The main component of the light is one 30W RGB LED module consisting of three arrays of red, blue and green LEDs (it is widely available from various online sources).
Other components needed are aluminium heat sinks, three step-down DC/DC converters (used as LED drivers), one boost DC/DC converter (to provide powering from a wide range of input voltages), lens with a lens holder and a reflector, fan, switches, aluminium profiles and various scrap plastic for the enclosure. With proper tools, I could have made the enclosure even better but this one also came out well.
The light can be powered from a wide range of input voltages, including a car battery, or a typical laptop AC adapter. It has a fuse and input inverse polarity protection. However, the RGB light outputs were not properly balanced, so the resulting white is most probably not a neutral white as one would expect.

In short, these would be the technical specifications:
• Switch controlled red, green and blue light output (independent or combined)
• Input voltage: 9-30V DC
• Input power: 32W MAX
• Input inverse polarity protection and fuse protection
• RGB LED module consumed power (R+G+B): 23W

Again, my need for this light was to use it as an auxiliary light for experimental photography and video and I used the opportunity while making it to record the process and make an educational video which I believe it can be useful as a tutorial for beginners in electronics.




Your questions or comments related to the project are welcome.

Thanks,

Goran