Let's Make Robots!

Tips & walkthroughs

this is my home made omniwheel , it`s very very easy and cheap to make one ,and i`ll show you the parts and the steps to make it … Read more
How to use the Prop to do multiple things at the same time
This is part 3 of a multi-part series.  The other parts are here. Let's imagine a hypothetical 'obstacle avoidance' robot with a set of wheels and a ping … Read more
AXE121 is an cheap and easy to use Line Follower Kit that can be easily connected to the Picaxe 28 pin Project board. You can buy it on the PICAXE on-line … Read more
You may think this is a strange tip, but I am very serious; Someone should have tipped me: Get an oscilloscope!
I am sorry if this seams like a strange tip. But the point with the tips are to let other know what you have ecperienced / learned / would have wished someone would … Read more
Measures your pulse/heart rate
The circuit shows a sensitive finger-type pulse detector. The concept of the circuit is simple. With the alteration of the blood volume in the finger the … Read more
This is part 2 of a multi-part series.  The other parts are here. Spin is an 'object-oriented lite' programming language.  I like it because it eschews some of … Read more
One thing most robots need is the ability to control motors. This circuit will work from 7.2V to 15V with PWM frequencies up to 25KHz and drive motors with a stall … Read more
Modify your rc-servo into a computer controlled fully funtional servomotor with 12-bit absolute feedback (4096 positions - 0.08 degrees resolution)
Yes we like servo mods! Read more
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