Let's Make Robots!

My Custom PCBs have arrived !


They arrived!!!! I’ve literally counting the hours till they got here!


It took me some time to get the perfect design but it was worth it! I used PCB Layout to design them and ordered them with BatchPCB and it worked out perfectly, the quality of the boards is incredible and I now understand CTC when he was talking about his own custom boards.

RC car that climbs walls

Just a toy i saw the other day... i think it is a nice idea for a feature to include in a robot... :)


it works like a vaccum cleaner... so maybe using a modded mini vaccum cleaner this could be added to a small robot...

example of vaccum cleaner for about 6 USD here



Lab in standby mode

I'm moving to an apartment near Lisbon, and this is one of the reasons for the long time no-posting and non-building robots..  and I still have to wait one more month to have my lab back!   :D





Edit:  2010.Feb.01

PICaxe Platform Module

I've been working on a design supporting 28 & 40 pin PICaxes.  The PICaxe board would support current and upcoming modules like the LCD I/O, motor controller, Internet / IP board, DMX, MIDI, etc.  The prototypes came out great:


The Pulse - 2009w39

LMR on the Brain
Sensing the living LMR community since 2008w43.


Remember kids: once your robot is posted on LMR: it stays there. For ever. Come next Christmas, Pesach or any kind of New Year, LMR will still be hosting the pictures your shot, the video you edited and the very words you wrote.

Hacked tyco rebound rc car, now I need ideas on what to do with it

Today I dug out one of my old childhood favorites, the tyco rebound. In case you've never seen one, the rebound has 4 wheels large enough so the car can flip itself over. Steering is done like a tank with no treads, each side going forward or backward. It's also FAST. I tore it open and it's built perfectly for modding. There are 6 wires attached to a circuit board. 2 for each motor and two coming from a 6 volt battery pack.

Mr. Wake [Prephase]

Hey LMR!

This is the prephase blog for Mr. Wake, my Mr. Basic V2 challenge entry.


Ok, the idea behind is:

My Mr. Wake is an alarm clock bot. The operation intended is as follows:

Check the purple wire first (a.k.a. "so that's how my computer died")

So the power on my CNC machine was going to come from a computer power supply, and I had a recently decommisioned computer lying around.  Instructables and other sites have some good instructions on "ATX power supply to DC"  and "ATX power supply to lab power supply" (search strings).  After wiring the thin orange to the thick orange, and the thick green to black, and a red wire to a "sandbar" load resistor, I thought it should be working.  After all the changes, I still did not even have 5V coming out of my purple "standby power" wire. 

They arrived!


 The so long attended component arrived!...But now it is to late: it is their turn to wait, at least till next week end! Too many thinks to do at work!

Uff :-(



My First Robot

Draft Robot Page: http://letsmakerobots.com/node/12713

My first robot is a Valkyrie CNC using TinHead's example: http://letsmakerobots.com/node/9006


Vector Drawings: http://letsmakerobots.com/files/clone_cnc_vector.pdf (draft)
Measurements will be available for these drawings by December 2009 or if somebody bugs me for it.

The Blue Thunder Project: New concept art!

 This is Blue Thunder. He has nearly every major degree of freedom that a human has, using 28 servos.

That's What I'm Building. I need input on Batteries, that need to run 26 High torque servos and 2 Micro servos, are rechargable, light, and get a runtime of over 10 min.

"LoMoR" - Lets Orientate & Map Our Robots (Sonar Based)

"LoMoR" - Lets Orientate & Map Our Robots (Sonar Based)

 Also Blogged as Mystery Object Here

My System Uses a LCD display to Map an area which is scanned by an Ultrasonic or IR Distance_ing transducer.

The Angle of the Probe is converted from polar Coordinate to Cartesian Coords and then displayed X,Y fashion on the LCD Display.

The System works pretty well i must say, however the "Extra" echos of Ultrasonic signal can be miss-leading.

my poor robots.

i have come to realize my robots dont stay in one peice for too long. i get a new idea and parts go flying. guess thats a part of being broke. anyone else have this problem? blocky has been torn down and his peices are on my new robot to be posted soon the rest of his parts are going to end up on my airsoft robot. look out for that one too. i guess this is just an update on whats been going on. havent been around for a while moved out and whatnot

GRAB-E Build

NOTE: This is a reverse chronological blog. Start at the bottom if you are new to it. The most recent entry is at top, just below this notice.

You can also view the Robot Page for this bot.

Update 2011-07-13 (in the wee hours of the morning)

Arduino, Bluetooth, Linux continued....

Bluetooth, java, Linux - seem to be working together in harmony now. Some things I learned along the way regarding the RXTX java library and Linux com ports in general:

By default, only the root user has access to read/write the serial ports on the system. So if I take the sample code from RXTX I've attached called FindPorts.java and run it from the command line with my user account it will not list any ports. This code was lifted straight from the RXTX site. I've packaged it in a jar file for ease of use from the command line:

Arduino ServoShield Sequencer

While thinking of exciting things to do with the new Renbotics ServoShield, I realized that most of them required some sort of sequencing. Google-ing did not result in much so I decided to create my own.

The first challenge was; how to store the sequence? I decided to use the on chip EEPROM and came up with this simple structure:


I am a beginner, I would not know much about the robot, who has a detailed description about robots? Thanks!
I want to do a robot will be picking up things.

Mystery Gadget - Code name "LoMoR" - RSS feeds Bog Off

Here is a Mystery Gadget i made for you to ponder over until i get some Video Up and Running.

Edit:- Now Fully Blogged "LoMoR"

NB. If there are any Automatic RSS feeders listening into this Blog then  "Bog Off" ,this is a Top Secret LMR only scoop.

Any Idea what it is then feel free to guess............codenamed "LoMoR" Lets-Orientate-Map-Our-RobotsRSSFEEDERSBOGOFF.jpg

Arduino, Bluetooth, Linux

Back to work on the Ardbot. I've decided to build my control panel competely in java/JavaFX on Linux. One challenge was getting my Bluetooth connectivity going on Linux with this configuration:

  • Kensington USB Bluetooth dongle on Fedora 11 PC
  • Sparkfun  Bluetooth modem on robot

My goal will be to control the robot from a gamepad controller attached to the PC, wirelessly over the Bluetooth link.

Big bot parts on the way :-)

I have no name for it yet, but I am building a bigger robot.  Over a year ago before I even started on iGor I built a 10"x8.8"x12" aluminum frame box, intending for it to be the body of a robot.  I think now after several smaller robots I'm ready to continue with that one.  So here is an idea of what i am gonna do


2x12V lynxmotion motors with R/C truck tires and 2x desk chair type casters


12v SLA battery