28 Jul '14, 8pm

18-Channel PWM Aquarium Lights Provide Habitat-Like Life for Fish

18-Channel PWM Aquarium Lights Provide Habitat-Like Life for Fish

The driver board is his own design, and he etched a huge board to hold all of the components. Everything is driven by an Arduino Mega, which has 16 hardware PWM channels; two short of what he needed. Because of this he had to spend a bit of time figuring out how best to bit-bang the signals. But he’s putting them to good use, with fish-pleasing modes like “sunset” or the “passing rainbow” pattern which is shown in the image above.

Full article: http://hackaday.com/2014/07/28/18-channel-pwm-aquarium-li...

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