Let's Make Robots!


Breadboard Propeller and programming with Linux and PropGCC
Using a
Writing program in C with propgcc on Ubuntu Linux so you can compile and load the Parallax Propeller with Linux and C rather than Windoze and Spin. The video is … Read more
 I recently read two great tutorials from gadget gangster on how to write to and read from SD card. Now this is great if you want to write pre-set text. But … Read more
    I introduce you to the RocketBot Family of Robots. Read more
Analog, Serial, Motor Control, Audio, Video, Xbee, Bluetooth, PWM... Everything!
Chris was nice enough to send me a little project of his called the 444AVXB. Why the weird name? Well, because it does EVERYTHING. 4: amps of motor driver power (2 … Read more

Variables and operators help in Spin

Hi again LMR Im having some problems writing basic obstacle avoidance code for a propeller based robot with a ping
when i compile the code i get the error "variable needs an operator"
its a bit noobish of me really but im a bit stuck.
And yes i have read the pages on operators in the propeller manual (page 144 in the propeller manual v1.1)
Heres a screen cap for those interested

many thanks for the help

Tom J

Navigates with a PING))) currently. Used for experimenting with Propeller on a robotic platform
Using a
The PREP - Bot is my first robot using a Propeller Microcontroller, and my first robot post on LMR. P.R.E.P. stands for Propeller Robotic Experiment Platform. … Read more
The robot controller app is out! Woo Hoo! Finally, a Android-based hobbyist robot controller that works with every microprocessor. There is no corresponding … Read more
  Well, it's about time for another Walter Update. Busy Busy. I won't (and can't) describe the many, many hardware changes --or to the point, the transition from … Read more
It all started here... http://letsmakerobots.com/node/26267 Once again, I set out on a quest to build yet another controller. I don't know what to call it really, … Read more

setting up a propeller on a bread board

im having trouble getting the propeller tool to recognise my breadboarded propeller chip.
ive set the chip up according to the schematic below except the eeprom has been ommited.
the propeller tool is telling me that nothing was found on the com ports


48kHz 16-bit Stereo SPDIF

This has been out for a while, I just hadn't played with it before (check out the video to see what I'm talkin' about).  The audio quality is perfect - it's an amazing effort.  Just an SD card and an LED.  I modified it (very slightly) to work with SDHC and the Propeller Platform's pins, here's the code zip_small.gif

Add collisions, movement and color to your lightcycles game
This is the second of a 3 part series.  Here's part 1, and stay tuned for part 3.  For more Spin tutorials, go here. Read more
Make the lightcycles game from Tron on the Propeller with this step-by-step tutorial
This is the first of a 3 part series.  Stay tuned for parts 2 and 3!  For my other Spin tutorials, go here. Read more
Ah, the chaos of life... A lot has happened in the the last couple months. This is neither the time nor the place to rant about personal issues or work or money or … Read more
In this tutorial, I'll show you how to use the Parallax Serial Terminal for debugging with the Propeller.  This builds on my other tutorials which you can find … Read more
In this tutorial, I'll show you how to write data to an SD or SDHC card with the Propeller.  This builds on my other tutorials which you can find here. Read more
Let's take a look at Text-to-Speech & show you an example of how objects can be used.  My other tutorials (including my written objects guide) are here. The … Read more
In this tutorial, I'll show you how to drive multiple servos at once with the Propeller. Along the way, I'll also introduce you to using objects.  My other … Read more
Doing 2 things at once is pretty easy!  This video tutorial goes over simultaneous multitasking on the Propeller.  My other tutorials (including my written … Read more
A video tutorial for your first Propeller program
Here's a video tutorial for the venerable 'Blinky Light' program with the Propeller.  I originially did a written guide to spin (here), this video is meant as … Read more
Control a Servo with a Ping Sensor in about 5 minutes
Using a
When I did the Web Clicker, I picked up a copy of ViewPort for debugging and it was a lifesaver.  ViewPort was designed by Hanno Sander.  He also developed an … Read more
Control your TV, DVD, Stereo, DVR, Cable box, Mac, Xbox, or any other IR device with the Web Clicker! The Web Clicker is a web server & IR transceiver.  You … Read more
Navigates around via ultrasound on water
Using a
This is my first robot, I started with a boat made out of isolation foam, witch floats really well! The 'Brain' is a Picaxe 28x1 project board and I got the motor + … Read more
Debugger / PC interface for Propeller
ViewPort promised easier debugging on the Propeller - does it deliver? What is ViewPort? ViewPort is a software tool to help you develop on the Prop.  There are 2 … Read more
Bender is a medium sized robot based on the Crustcrawler Nomad HD platform. It uses the Parallax Motor Kit with Position Controllers, a pair of Parallax HB-25 Motor … Read more

Retro Game Development

Doug Dingus (potatohead in the Parallax forums) has written an article about retro game development using the Propeller - he interviewed me and Jim Bagley and did a great job summarizing the Prop.  We also kicked in 5 El Jugadors to give away to readers.  Classic VGM has made a special preview version of the article here;

The Maxim7219 (datasheet) is a handy LED driver.  each chip can drive 64 LED's and several can be daisy chained for large displays, it's also used in the Blue … Read more