Long Light

Project Number: 29

Description: Build the circuit and set the meter (M6) to the 5V setting. Set the slide switch (S5) to position C and watch the voltage on the meter as the battery runs the yellow LED (D5). How quickly does the voltage drop? Try placing the circuit in darkness, changing the temperature, or varying the wind. If your battery was recently recharged then you probably found the voltage drops very, very slowly, and though this was boring. That was the ideas - batteries can run things for a long time and (unlike solar or wind power sources) are hardly affected by changing weather conditions. Batteries can provide power whenever you need it - but, eventually, they do run out.

Snappy: [Not Talking]