Let's Make Robots!

Tips & walkthroughs

Senses current drawn by a motor
This simple circuit will allow your processor to monitor the current being drawn by a motor or any other device. The circuit shown will monitor currents up to 20A … Read more
When I joined LMR I had just written my first picaxe program.The picaxe was easy to learn since I knew basic and the manuals gave you all the information you … Read more
A basic - intermediate walkthrough on programming in Spin
This is part 1 of a multi-part series.  The other parts are here. The Parallax Propeller can be programmed C, Spin, or Assembly; I think most people use Spin.  I … Read more
Howto make sound without any sound transducer using only the DC motors of your robot.
Description: I  am just start to play around with the new Arduino Tone library, when I realize that I have no sound transducer laying around here. Than I remember … Read more
Cheap 4WD off road chassis for your robot
The chassis of the "Rebound" is perfect for small off road robots. The PCB has a radio receiver and dual "H" bridge. This walkthrough shows you how to make the … Read more
Free program for drawing complex flow charts
It’s always good practice to draw a flow chart before start coding. That will save you lot of debugging problems and the structure and flow of your program will … Read more
Take impressive pic's of your bot with this box
In this walk-through, I'm going to show you how to make a box in which you can take awesome pics of your newest creation for cheap! With it, I took this pic of this … Read more
Insert decimal numbers, dash, and star, to any of your projects
Hi, got this keypad from my local sparkfun distribuitor, but wasn't sure how to wire it up, the pins aren't in order, like on most other tutorials/examples, so … Read more
Rotary Encoder - For positional feedback of a Geared Motor
 My Latest Project "Swiss Milka Cow" needs some Positional feedback on 3 of its motors. What follows is my Solution using a Standard Geared Motor and a QRD1114 … Read more
Add 10-bit incremental / absolute encoder feedback to your hobby servo.
Modified continuous-rotation servos are used extensively by roboticists due to their small form-factor, enclosed motor-gearbox, ease of mounting and … Read more
There are three commands in Picaxe Basic that you can use for making sounds/music on the Picaxe. I posted my code as a file attachment, and there are some examples … Read more
If you are running out of input/output pins of your Picaxe here's something that might help you: Picaxe's configurable input/output pins can be used in three … Read more
Generating video to display basic text and information
I thought I'd show how video is generated with the Propeller as an example of multi-tasking and because video is cool.  Read more
My old printer broke down and before throwing anything away I always rip things apart hunting for parts that I can use in other projects. Most of you probably does … Read more
Make your robot to 2 (or 3, or 4, or 5, or 6, or 7) things at the same time
This is part 0 of a multi-part series.  The other parts are here. Read more
Driving motors at low speed with good torque
Many micro controllers have a PWM function built into their hardware that can be used to control the speed of motors or be filtered to create an analog output. … Read more
When building stuff I often need some sort of bracket or other fixture involving sheet metal. Read more
Controlling Picaxe microcontrollers with a computer or let them communicate
Using a
On general demand (ok, Fritsl asked me...), I will show and explain you how to let several Picaxe microcontrollers communicate with each other or how to control a … Read more
Transforms your Bland Bot into a Mega Rainbow Hippie
 How to Colour Your PolyMorph...........  Its taken me around 8 months to find the solution to colouring PolyMorph. Then i struck it lucky... an Artist Friend … Read more