Picture of Sequential Lighting LED Disc
Using a motor, some LEDs, a battery, and a few other things, it is possible to create an amazing device that serves no purpose aside from decoration and learning. LEDs on a small disc will light sequentially as a motor spins. This is a fine alternative, if I might say, if you do not wish to go through the process of buying/building, and programming a microcontroller.
Remove these adsRemove these ads by Signing Up

Step 1: Parts

Part list:
K'nex (can be substituted with any other structure-building thing)
Wire (Hookup, and stranded wire)
Cardboard, Plastic, or similar
Aluminum Foil (Conductive ink of some kind is a preferable substitute. I didn't have any.)
Wood or something to form a base

Step 2: Foil

Picture of Foil
This disc will spin and complete the circuit to light the LEDs on the other disc.
If you are using conductive ink, skip this step.

First, trace a circle in the foil.
Next, cut it out (carefully as foil has a tendency to tear).
You will need to cut two out.
Then, cut out a hole in the center of each circle.

Cut out two smaller ones to fit inside the larger ring (leave some room between the smaller one and the ring).

Step 3: Disc 1

Picture of Disc 1
Now, it is time to make the conductive disc.
Cut out a circular piece of cardboard (or plastic, or whatever you have).

Aluminum Foil-Mount the foil to the disc by poking wire through each side and twisting it to secure the foil.

Conductive Ink-If you are using conductive ink, just make a thick ring around the edge of each side, maybe a centimeter thick depending on the size of your disc. Make a thick circle in the center as well. Then put a piece of wire through one side and out the other. Secure it there to make the ring on each side one conductor.
ahossain32 years ago
Dear sir,
I need a simple circuit with a single LED which will blink at a rate of 10 times per second.
But it will blink for three different times duration with three different interval. For example;

-------------------- (20 times blink in 2 seconds, then 2 Second gap/pause)
---------- (10 times blink in 1 second, then 1 Second gap/pause)
----- (5 times blink in 0.5 second, then 0.5 second gap/pause)
then the process is repeated continuously until disconnecting from power.
MdP1632 (author)  ahossain32 years ago
I would suggest using a microcontroller such as an Arduino for that kind of project. Without a microcontroller, I can't think of a way to implement that without a very complex circuit.
MdP1632 (author) 7 years ago
Sorry about the blurry pictures. My camera isn't very good.
arrow shot7 years ago
awesome 2 get the LED out contestants in knex section. I got a circuit kit once (awesome snap circuit set) i wasnt much of a fan with the led light..
dsman1952767 years ago
interesting. you should put knex as a key word.