If you really want it to work, use an energy harvester. I also made this one for Photopic Luminous Efficacy: Relative Sensitivity Curve for the C.I.E. The colors use the CIE factors to convert wavelength to RGB I created this web page that shows the conversion factors from luminous lux, to radiometric watts, and quantum (number of photons) So you would be better off mixing blue (preferably 450 nm) and red (preferably 660 nm deep red) to get purple.
470 nm blue needs 0.016 µmols to generate 1 lux. A 12.4 µmols of photons are required to get 1 lux from a 400 nm LED. A 400 nm purple LED would need 773 times more photons than a 470 nm blue LED to achieve the same luminous intensity. Purple is very difficult to get luminosity. The Cree 11,000 mcd blue LED will work much better than a 2,200 mcd purple. Less current also gives you a lower forward voltage. This means you get more light with less current. Use current mirror transistors to balance rather than resistors: Current distribution in parallel LED stringsįirst off you need to use LEDs with a very high luminous intensity. Pay attention to your LED forward voltages.
Use only 2V red, yellow, and orange LEDs.Ģ NiMH batteries in series may work better. You should not need more than a few mA if you use high luminous intensity LEDs. You are expecting too much out of the QX5252, an NiMH battery, and a little solar cell.