Now when I go camping I like to escape technology and just enjoy nature, however I often want light at night in my tent, who doesnt? With all your electronics at home and an outlet far from reach light is hard to find at night, so in this I will show you how I made a solar rechargeable light bulb using LEDs and common materials. Its eco friendly and fun! Ok now lets get started :)
Step 1: Things needed. (no image)
9 white LEDs
1 standard diode
1 solar panel ( i used two)
1 dpdt switch (i used two spdt side by side)
rechargeable battery. ( I used a 4.7 nickel based battery)
1 ten ohm resistor (might not be needed in your case)
OTHER THINGS NEEDED;
2 liter pop bottle
white spray paint
some fishing line
Step 2: The cardboard and pop bottle
First cut off the top of a 2L pop bottle and then cut a small cardboard circle that would fit nicely inside of the bottle top.
The cardboard circle will be our make shift circuit board. It will hold all the electric componets.
Step 3: The circuit.
This circuit is pretty easy and before we start putting the componets together on our make shift circuit board lets take a look at the schematic. The most important componet in this circuit is the DPDT switch. in one position it allows you to charge the battery (solar) and in the other position it turns on the leds. The DPDT switch also acts as an off switch.