Step 1: Materials
A solar cell with an output of 3vDC (Volts Direct Current)
At least a 1400 uF Capacitor (or more)
A 2.2K ohm resistor 5% (color bands are Red, Red, Red, Gold)
2N 3904 Transistor
2N 3906 Transistor
Motor (make sure it runs on 3Vdc, most do, but just to be sure check with two AA batteries)
FLED (flashing LED)
I got all my components from ripping them out of toys and buying them online. You can try http://www.solarbotics.com/ or http://www.digikey.com or ebay.
you will also need:
a soldering Iron (any cheap one will do)
some solder ( a small/ thin size works great)
a pair of Extra Hands (can buy online or at Radio Shack)
and a sunny location for testing
Step 2: Understanding the Solar Engine
Step 3: Putting It All Together
NOTE: IT IS IMPORANT TO KEEP THE POLARITY! ALL LEDS (THAT INCLUDES THE FLED) ARE POLARITY SENSITIVE! SO ARE CAPACITORS!
Polarity Rules for FLED, LED's, and Capacitors
- Capacitors have a line on their side that is a different color that the other more dominant color, this is the negative. Ex: a Capacitor is blue all over except a black line, that would be the negative.
-FLED's and LED's have a flat side around the bottom of their base, this is the positive lead. Ex: a green FLED has a circular base and a flat side near one of its leads, this is the positive lead.
Once you have followed the diagram below and have soldered everything up it is now to test or troubleshoot the Solar Engine.
Step 4: Testing and Troubleshooting
Here are some common mistakes:
bare wires touching
bare wires touching metal that touches other bare wires
to big of a capacitor, and taking to long to charge
not enough power comming from solar panel
any broken/ really dammaged component