Print PDF
Favorite
Email
Step 8Testing one...two..three..four
Let's test this out. Use your low 9V battery (or good one and resistor) and keep trying pairs of wires in a V (not straight across) until you find a pair that lights up half the LEDs in a V, just like in the picture.
No matter how you crossed the wires, you'll always find a pair of wires that works. (If you want to use science, you can prove this to yourself. If not, push on.)
If you brought your voltmeter, measure the voltage from plus to minus, then from minus to the middle and see if it's about half. Because of minor variations in the LEDs, it won't necessarily exactly be 1/2, but it will be close enough.
OK, it works, but why are we doing this? When we arrange all these X's in a circle, we can put all minus leads on the outer part of the circle and all the plus leads on the inner part of the circle, and won't that be convenient!
Plus, the middle attachment points of the LEDs will make lots of triangles, giving our wreath structural stability.
No matter how you crossed the wires, you'll always find a pair of wires that works. (If you want to use science, you can prove this to yourself. If not, push on.)
If you brought your voltmeter, measure the voltage from plus to minus, then from minus to the middle and see if it's about half. Because of minor variations in the LEDs, it won't necessarily exactly be 1/2, but it will be close enough.
OK, it works, but why are we doing this? When we arrange all these X's in a circle, we can put all minus leads on the outer part of the circle and all the plus leads on the inner part of the circle, and won't that be convenient!
Plus, the middle attachment points of the LEDs will make lots of triangles, giving our wreath structural stability.
| « Previous Step | Download PDFView All Steps | Next Step » |
 |
Add Comment
|
