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We use Optec OP560C "side-looker" photodarlingtons from Mouser.com. Digikey also has them I think. If Mouser or Digikey don't ship to your country, try searching this part number.
No, we mean F (Farads) not uF (microfarads).These are not your grandma's capacitors. They are supercapacitors a.k.a. ultracapacitors. See below for advice about how/where to buy them.
Hi Robotobor:Good idea. We did put a Solarbotics kit on a Bristlebot - it's kinda cool, hangs round doing nothing, then has a spurt of activity, then stops, then ...Hadn't thought of combining the two, but it's a great idea - a solar-powered steerable bristlebot could seek sunlight, and keep itself awake!
Hi Enstain:The sensors we use are OP560 "side looker" Darlington phototransistors, which can be bought online e.g. from Mouser. A photodiode + transistor might be a slightly cheaper option, but this would be more complicated. I don't like complicated.
good idea, we will think on an edit. We (and our testing team) haven't actually blown anything up yet but we wouldn't want to inflict that on anyone else :)
Light sensing bristlebotView Instructable »