Line Following Sensor
I've made a prototype of a line following sensor so I should be uploading information on how this works in the next few weeks. It will eventually be used as an input into the PIC which controls the autonomous robot.
I used a design from ikalogic.com which can be found here. I chose this design as it requires very few parts which means a large number of sensors can be created very easily and cheaply.
Parts needed to make a line following sensor for your Robot
- 1 x op-amp (I'd buy a few quad op-amps as the more sensors you have the more accuracy you get)
- 1 x LDR
- 1 x LED (a white LED works best for me)
- 1 x 10k resisitor
- 1 x 1k resisitor
- 1 x variable resisitor (I'd get a few 47k resistors as they are useful to have for other projects and testing)
Assembling your homemade line following sensor
Assembly of the line following sensor was very easy, I followed the instruction here and I was able to put a test assembly together very quickly. Below is a picture of the completed board with the wires clearly visible.
Here is a quick video showing the homemade line following sensor in action: