I recently went to my favorite store,The Dollar Tree-everything for a dollar, and found some small solar lights. When I opened it up I found one bright white LED, a solar cell (about 2,5V) , a AAA NI-Cad battery and a Joule Thief on a chip. I have been building these as artsy gifts for people so reducing the circuit board down to about 1/4"x1/4" seems great. The chip is four in line pins, However upon looking I can't seem to find them. I did find that they were, of course, made for a Chinese manufacturer. Can anyone help??