Quick test of the new ESP8266 code for driving the ws2812b LEDs… not far off 2 amps at 5v in at one end – GND and ESP8266 signal other end… fully tested with 300 serial LEDS – this is my next WIFI SAD LIGHT once I find something with enough power and some very thick cable. 70 LEDs here.
Peter
Are you sure that LEDs give out the right light wavelength for SAD purposes? I know if using fluorescents you have to get the right ones that are called full spectrum tubes.
Well aside from not being able to access IR or UV, the serial LEDS do a good job of just about any visible colour. We’re not making a medical product here, but recent research suggests that in the evening, just like nature, light should ideally be heading toward the red, rather than the blue end of the Spectrum – so a large array can be used (and I do this already) to provide an increasingly red light at night, with a nice cold, white light in the morning with all shades inbetween. The light output is of course like a TV, a combination of wavelengths rather than a single one.