Let's Make Robots!





Join the LMR CAD Team! We (Krumlink and -Gary) are a group of Experienced CAD users capable of designing stuff in CAD! We use the STEP file types to share files between all (Autodesk and SolidWorks) software. Put your name in below, and begin collaborative CAD design!


This post will be improved upon later, but we will post our collaborated CAD drawings, etc

Robots Community and Tutorials www.botstop.net

Hello every at Lets Make Robots, Happy Birthday.

I would like to make you aware of a website I am starting up, BotStop.NET. You can upload your robot to have it reviewed by others in the robotics community, read and make suggestions towards robotics tutorials, take part in competitions to win parts and components for your creations, or chat in the forums.

Luxeon Leds - what would be the simplest constant current driver for them


I have just bought 5 of these 3W High-Power LEDs 

I could drive them off batteries direct ....

...however i would prefer to feed them with a "constant" but adjustable (350mA-750mA) current.


What would be the simplest circuit i could use ?.....

.... and would there be a way to PWM them?. 


Specs :-

3W High-Power White (6000-7000K) 130 Lumens - 140 deg

my super ex-girlfriend robot

Hi, everybody!

Does anyone have "my super ex-girlfriend robot" movie in his collection? I remember there was an episode with little robot carrying a flower or something... I think of building a replica of it as a gift to my wife. Anyone can help with screenshoots from movie picturing it or maybe even little clip cut out of it?

Thanks :)

I got some trouble over the first project.

Hello I am trying to do the first project of the robots, http://letsmakerobots.com/start I bought all the things needed but I got some trouble I dont know how to connect the sensor, its exacly the same as the project uses. I am getting lost at the part that says that because he refers to some other kind of sensor and than there is no image to understand how.

fritsldr with arduino

hi guys.
ive been having some problem figuring out the code for a fritsldr in arduino.
so far i keep getting this error:

error: expected unqualified-id before numeric constant.:

 error: expected unqualified-id before numeric constant in function 'void loop()'

PICAXE editor

I put this into the PICAXE programming editor

servo 0,150
wait 2
servo 0,225
wait 1
goto main

then I hit F5. A window comes up, downloads the program, and says "Download was successful! Firmware version A.6, Memory used = 18 bytes out of 4096." But nothing happens. I unhooked the sero and when I hooked it back in, it slightly jerked. I did this about 4 times until it stopped doing it. Now nothing happens. Is this something wrong with the electronics? 

qrd1114&qrb1114 phototransistors

trying to build line follower anybody tell me if the 2 sensors can be interchanged trying with the qrb and having trouble getting the motor to shut off ir will emitt and motor will run. will buyqrd if have to but will like to use ones i have

   thanks for any help



Hye, Sorry to bother you, I have some questions about a hexapod. I want to make the same like this http://webx.dk/robot-crawler/robot-crawler.htm  for my college project, if you have time to have a look on it, I want to know the configuration of the pcb board, an electrical schematics electric parts needed, what cpu usses, what kind of servos (can I use weaker servos?) . If you can help me, I would be very pleased, if can't..no problem. Have a good day.

Mega cheap breadboard


$4 for a 400 contact breadboard. I just ordered one so I'll let you know how it is when I get it.