Robots look cooler when they have a sinister green glow. Better yet, when that glow exists for a functional purpose it’s even better!
Step 1: The Mechanical Design
First you need to design your robot.
I designed mine using CAD, planning out the locations of all the parts carefully. This is the most important step to making a robot!
I hand made each of the components using a manual mill.
Follow the images in order for construction steps.
Step 2: Add the LEDs
In this step, I used two 4000 candela green LEDs in series with weak resistors.
When the green light reflects back at the sensor, more light reflects back from the white line than the background. By using a simple voltage threshold, the sensor picks up more light when its on the line. Therefore it can follow it!
I could have also used infrared LEDs . . . but you can’t see it so where’s the fun?!
Step 3: The Microcontroller
I used the Cerebellum 16F877 PIC microcontroller (no longer sold).
You can download my sourcecode here
I mounted the microcontroller using hex spacers and screws. I also added a bit of amusing decoration . . .
It’s turned on so thats why its glowing green!
That concludes my instructable, hope you give me a good rating! =)
For more detail: The Glowing Green Robot