I made this just before the overnight camping trip to coast, in bit of a rush, because of time limit and was so hot and with solder iron on even worse and sugru was nearly melting in hands, so my tip try not to do it on hot day and dont leave it till last minute;)
The way it works is very simple:
Supercapacitor gets charged with solar, by connecting two parts together and placing this in sun (see picture)
When charged capacitor is connected to LED lamp the light is produced ( does fade with time, more farads more time it stays lit)
4.8V 50mA PowerFilm solar cell (you can use any make, the one with larger current would charge capacitor quicker)
3V Supercapacitor 20F or more
2.9-3V LED module
2 X 2.1mm X 5.5mm DC socket female and 1 male connector
Fin clear film sheet
Small glass jar with screw on lid
Moulds (shot glass)
Step 1: Solar Panel
Take small piece of protective film of the metal strips at the sides, use your DC meter to determine the positive and negative side (cathode, anode) Solder diode to + and some wire to -, then solder other end of diode to + on dc socket and negative to -, I find it easier to stick the wire through the hole then solder.
The reason for using diode is to make sure that electricity flows in one direction.
For finishing, cut solar cell shape out of clear film, cut hole for dc socket, fit the panel in and apply sugru on sides, this step is quite tricky. The reason for using film is to give it more protection as these modules are not waterproofed and not UV balanced.