Let's Make Robots!

follower

Follow Dark and Light Lines
Using a
Tracer is a simple linefollowing robot that has the ability to follow light or dark lines. It is able to do this through taking advantage of four photoresistors. … Read more

Line Following Sensors

Hello everyone,

I am making a line following robot for a competition in Australia called "Robocup Junior". It involves following a line, also, taking shortucts indicated by a green square. At the suggestion of one of the friendly LMRians I invested in an IR Sensor board that can follow the line perfectly. The only problem I have been having is that white and green have the same readings (must be a problem with infra-RED and GREEN being different, or something:)

So I am creating this thread to see if anyone has had any experience with any light or colour (color) sensors.

QRD1114 Resistor Values

Hi all,

I'm using a QRD1114 sensor for a line-follower. Datasheet: http://www.fairchildsemi.com/ds/QR/QRD1114.pdf

Im hooking it up with this schematic:

However, I'm unsure how the value for the 10K resistor was calculated? It's acting as a potential divider, right?

For the LED im guessing that the value of 220 was taken from doing:

R=(Input Voltage - Max Forward Voltage)/(Optimum forward current)

This one is for all you Simpsons fans. I've been watching them as long as I can remember! Ever since seeing Homer build Bart a combat robot I wanted to build my own … Read more

Maze Solving Robot V3. This one will work.

Not too long ago I received a care package from CTC. He sent me 2 of his arduino PCBs he designed. 

 

So that got me thinking, what would I build with it?

Well as this is going on, my highschool finally has its laser cutter installed. So it would be foolish of me not to use it. 

Here I go, making my highest verison of a robot yet. Maze Solving Robot V3. 

 

This is the fully functional test chassis for my Arduino based sumo robot. It will be competing in March, 2011. For the prototype I am using a piece of plywood to … Read more

OPB704 Line Sensor

Intro:

I have received questions regarding the line sensor that I'm using on my mini sumo bot. Here I will post the schematic and pictures of the board. 

The OPB704:

So after lots of hard-work, frustation, time, spending money on wrong parts; I built a robot. Its a Photovore based on NPN transistors. when its LDRs are pointed … Read more
follows a black line on a white surface
Using a
Hi guys....     Finally today arrived the last order for this robot... the wheels and the caster....   I took me 2 night of CAD-ing...   Read more

3pi

I recently bought a pololu 3pi robot and tried programming it with a USB Programmer, but couldn't get it to work with Arduino.  Does anyone know how.  Its this -> http://www.makershed.com/ProductDetails.asp?ProductCode=MKPO2
Act cute, try to keep itself charged
Using a
Not much to say about it at this point; this little guy is basically going to be a living ornament. Read more
Line follower
This is my second line follower robot. It is very cheap. Thanks to the light construction it's faster than previous robot GOOFY.  Small motors are directly … Read more

Line follower "GOOFY"

This is my very first line following robot that is built around ATMEGA8. Construction and circuit are quite simple. Such a name- GOOFY is given because robot movements are somewhat clumsy. But hey! Its still working and doing his job very well! :)

1.jpg

There is two geared DC motors that are controlled using PWM. Tyres are the ones that are used in RC cars. Besides-these have a nifty looking. 

How do you make a line follower?

i just want to know how to make a line follower, like the equipment needed. if there is a walkthrough, please give me the link. if there isn't, can you tell me how or give me a link to a site that does?

 ~Dulumoon

Robots...ROCK!