Let's Make Robots!

Recently Collected Posts

On old trick to get more power out of your cheaper motors
Here's an old trick, but it it's good. if you have a setup with a (cheap) motor, and you'd like a little more juice out of it.. get some of them strong magnets, … Read more
***This post started as a poke at rik and his lack of ability to cut brass tube. As it seems people have gotten something from it. Here is a nice, nifty and proper … Read more
Differentially-steered robot with 12x5 LED front display, sonar "eyes", text-to-speech, self-docking charging, etc. In progress, but mostly done. 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
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
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
navigate around, make sounds, communicate with other 'bots, flash lights
Using a
Curl is a small mobile robot designed to implement simple autonomous obstacle avoidance behaviors and to be easily expandable. It is cylindrical, 5 inches diameter, … Read more

Remote controlled unmanned power-chair

Ok, My idea...


I have reason to need a bluetooth or r/f remote controlable powered wheelchair. To be able to remotely turn it on (& off) and manouvre it from an outdoor shelter over to a freshly parked car's drivers door.

What I have at the moment is just the base power chair:

Powertec F50 by Sunrise Medical


What I wish to do as much as is possible is to leave the current set-up as it is, and to add the propsed r/c system to work along side it.


Navigates around via ultrasound, reacts on brightness, emits blue cold light by chemiluminescence
Using a
This project shall be another step to combine robotics and chemistry. Mr. Firefly is able to emits blue cold light by chemiluminescence. For this attempt, luminol … Read more
This is my first working robot as I have had a few other attempts but had problems with the arduino's motor shield (I kinda overheated a few components to the … Read more
Hello everybody! i'm new here and i would like to share this project of mine. It's a Minisumo-BEAM STYLE. I've always wanted a minisumo and when a … Read more

How to connect a light dependent resistor to a picaxe 28X1


I recently go a light dependent resistor

and i cant seem to figure out how to connect it to my picaxe28X1, would anybody here know how ???

Any help would be apreciated !!!!!





What's the best way of turning? We have 2 DC motors, one on each wheel. To turn right I was sending forward command to the left motor and backward to the right motor but I'm having diffculty to keep track. The min PWM to give first spin changes drastically in every situtaion.  We have a digital compass and and I'm thinking relying only to that for this decision but it would be better if I had a look up table with tick numbers of encoders for each desired degree.


 How do you do turns in general?


I have built a couple of rudimentary 2-wheeled rovers before, nothing special, but I really fancied trying a hexapod.  So here it is/will be.  It will be an … Read more
This is my first robot, I used: Microcontroller Microchip 18F2221 C language programming, free C18 compiler. Servos HS311 Xbee radio I designed the PCBs using eagle … Read more
The L6203 is a full bridge driver for motor control applications realized in Multipower-BCD technology which combines isolated DMOS power transistors with CMOS and … Read more

Getting started with machining

About four years ago I came close to taking a job at Honeybee Robotics, a company that makes robots and parts for things like the Mars rovers. One of their robots, W.I.S.O.R., even had a really cheesy movie made about it. It would have been a pretty cool job, except that what they wanted was someone to machine parts for their robots, and I didn't know a single thing about machining.

Animatronic NIN

Uh, yeah. Nothing like taking a happy fun memory and turning it to Nine Inch Nails :

FYI, the Rockafire Explosion was an animatronic band that played in a kids pizza chain, Showbiz Pizza, in the 80s. Kooky, happy, family songs, played Beatles Happy Birthday song for kids, etc. Now only in collectors and inventors hands. 

And now, after the Showbiz's have closed, this.  Wonder if they'll cover Pantera?

DSO nano is a pocket size digital storage oscilloscope fulfills basic electronic engineering requirements. It is base on ARM Cortex™-M3 compatible 32 bit … Read more

Yet another PWM Picaxe question

I am programming my Mr Basic with Mr Basic moron driver. I use a Picaxe 28x1. It is a very basic setup indeed, with a small servo carrying a sharp IR distance sensor.

After reading many pages of manuals and LMR and example code of other victims, I ran into a wall. It's the dreaded "PWM and servopos don't mix" wall on picaxes.

Navigate around via ultrasound
Using a
After seeing all this cool robots on LMR I build one my self. I used parts from an old computer, printer and old cassette recorder to fabricate the frame for it. … Read more
Hey guys, Figured I'd share some of my more recent work; Dragoon. This is an RX-64 based quadruped robot using an ArbotiX Robocontroller and the new & … Read more
Walking, Balancing, Competing in Mech Warfare
Using a
First post here but figured I would share my most recent work; an EX-106+ servo based custom humanoid robot named Giger. This bot was designed in Autodesk Inventor, … Read more
Lives on a table, reacts to light
Using a
This is my first attiny project after getting an led to blink. I guess it's a little ambitious - I hadn't even cracked the datasheet when I started. For my plan I … Read more
Walks, avoids obstacles
Using a
This was the first robot I ever built.  Its based on the design in the book Insectronics by Karl Williams.  The body is made from aluminium and it uses 3 servos … Read more
This was built before I realized just how hard it is to make something walk on two feet! It has a "swinging" battery on the top servo, and it does walk (flop from … Read more
For now, it does squats. Hopefully, it will eventually walk in a controlled manner.
Using a
  *** Hot Breaking NEWS *** Read more
3 years pass since I progressed; now I know a little program the PIC My goal in this new project was to create a robot worthy of the name, programmable! With a … Read more
Having finally got the CNC mill working, I've built another Robot. Its straight off the mill, and I couldnt wait for the battery box I designed the holes for to … Read more