Introduction: L.E.D Big Dipper
The L.E.D. Big Dipper was designed as an introduction to electric circuits. This circuit includes a resistor, L.E.D. and switch. It demonstrates breaking a circuit and resistance. It provides practice with wiring circuits because there are about 20 connections. This creates an electric, artistic display of the Big Dipper.
Tools and Materials
1. 6 mm foam
2.7 5 mm L.E.D.
3. Telephone wire
4. Duck tape
5. Slide switch
6. Hot glue
7. 9 volt battery
8. 9 volt battery snap
10. Wirer stripers/ cutters
11. 470 ohm resistor
Cut the foam to 5 '' by 3 1/2 '' sheets.
Tape the template on the foam and drill 3/64" holes on the dots.
Bend the short LED legs.
Wrap the resistor around the black battery clip wire.
Push the LEDs in to the holes in the foam board.
Wire both legs of the first LED to the second LED and test.
Repeat until the last LED and bend the long legs in the opposite direction.
Wrap the red wire around the seventh long LED leg.
Wrap the resistor around one switch post and another wire around the other then compress each wire bunch.
Cover all the legs with tape.
Put Velcro on the side of the battery shown.
Hot glue the switch to the back.
Attach the battery clip.