Let's Make Robots!

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wrench_orange.png Your work in progress or a finished robot: Robot project
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comments.png Discussions and questions: Forum topic
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lightbulb.png Help others with what you have learned: Tip or walk through
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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
Navigate around a table top using IR
Using a
  I've had my Arduino for over a year and had done very little with it until recently.  Mainly because I didn't have the tools or knowhow to actually build … Read more
It automatically programs a bunch of uControllers based on a firmware "playlist" created on PC
Using a
  Well, recently, I needed to have a bunch of AVRs programmed... A big bunch... And as I am really bored on repeated procedures I decided to make a robot to do … Read more
Follows the light from a lighter
Using a
Hi, My name is Zuzu, I live in my masters pocket and usually I sleep at day, but at night, when all the lights goes out, I will wake up and I will seek the most … Read more
Hi LMR...          I think that you often run into the problem with MCU that when you press a button it read it not only one time but often even 50 times or … Read more
Controlls any robot which has a Bluetooth reciever
Hi....           I am building a software wich controls a robot via bluetooth.... It sends out data to the virtual port created with the Bluetooth … Read more
it moves a webcam up and down and right and left.
Well i made this one for a friend . He has a laptop with a broken display but the embedded webcam works fine so he asked me to build a pan-tilt mechanism for this … Read more
Allow just about any sketchup model to be animated within a real time physics engine
I have seen that many users on LMR use google's free sketchup design software to get a rough overview of the appearance of the complete robot. Did you know though … Read more
Run 2 Motors, Fwd and Rev with PWM
I found this site for almost a year ago and I must say it is incredible! Full of useful information and creative, helpful people! When I saw Chris the Carpenter … Read more
Hey guys, (Full disclosure) I work for Trossen Robotics, and this is a prototype for an upcoming product we're making. But- I think it's a pretty cool bot, so I … Read more
I've been working on a home automation project for a while - Jon Williams' Spin Zone column on Sony's IR control format (pdf) got me started on IR control. It's … Read more
Self positioning buoy for scientific use
Using a
Some of you might have read my post on Whirligig http://letsmakerobots.com/node/16995 and its predecessor SEA RENDERING http://letsmakerobots.com/node/21098, and … Read more
Displays images when you shake your head
Hi, this is my POV dispay that I made for my Jamboree troop's gateway. Since I had no way of making it spin or wave, I had to have it just stay stationary while … Read more

Note: You can follow some projects some of the time, but you cannot follow all the projects all the time.




Recently collected


I have been developing this 5 axis CNC Controller on and off (mostly off) for the last 3 years. I wanted an "all in one" controller that did not depend on a PC to … Read more
TYPE Light Intensity Avoider / Follower, Line follower , Obstacle avoider , Motion sensor , Normal Driving
This is the multibot that is built  as an all purpose robot. The multibot is based on the arduino uno . 1. Arduino Uno 2 Light  intensity Sensor  3 Coloured Line … Read more
The Garden’s Camera based on Raspberry Pi (with motion detection)
Picammory Mark II The Garden’s Camera based on Raspberry Pi (with motion detection) Introduction Read more

Have the tools but need help with calcs

Hi guys.

 

I am heavily into automation in both my daytime job and my hobbies. I have always built gear I need. I have lathes, welders etc with access to milling machines etc, folding machines and other stuff.

 

I am building an autonomous hybrid farm utility. No issues with that.

 

I can do the the motor/gennorator etc, rams etc and all that. However, I need a push in the correct direction to calculate the drive train part. I know my required wheel size, weight etc so how do I work out size of the drive motors etc

 

P

Need consistent 90 degree turns. HMC5883L and Arduino Mega

I am currently working on a project for school. The idea was to create a robot that could perform pathfinding functions using A*. The path is found using a virtual grid of nodes programmed into the Arduino where "X"s are non-passable objects, "0" as the start, and "1" as the destination.

Not sure how to insert code on this forum. Someone could help me out with that as well...)

Example: 

Sits on the table, waiting for sunshine and once charged the cpas discharge and spin the motor for an annoying vibrating sound.
There is really not much to write about. I saw the nice freeform Annoy-o-tron 2000 and got infected. Grabbed one 555 timer as I saw a nice solar engine circuit … Read more
Vibrates and shakes, emits a low, vibrating sound that is hard to pin point.
This one surprised me as it was coming to life... It all started because I wanted to make a new solar-powered desk ornament kinda thing. I was a little unsure about … Read more
Enjoys the sun, twitches a bit and rolls around in a very lazy way.
I haven't posted in a while mostly because I had undertaken a lot of large, complex (for me) projects and I kept getting discouraged because it didn't go as … Read more