Let's Make Robots!

question on a h-bridge circuit I found on this page

Hello everyone,

well, I´m pretty new to this community and I hope this post is not too dumb in your eyes. I´m more at home when it comes to computers but as soon as I get into contact with circuits and means to make a computer sense the "real world", I thought about giving it the opportunity to drive around next to other actions. In fact I´m trying my best to deal with microcontrollers and learn by doing.

free 2d CAD

Hi.

Since secondary school, I've been using a student version of the cad package they use (2d design). However, it is awful, and is even more so now I've left, as I can't;

It's been a long time since I put up a new project, and I felt that I should from today onwards post all projects which I make since I've actually some other … Read more
Shake your Groove thing!
Using a
Just a fun use of the continuous rotation servos.  First video is DiscoBot II, my entry to the Coolest DiscoBot Video Award   Read more

WiFi - how can I talk to my bot with it?

I don't know much about networks and communications but most laptops and routers these days are wireless. Can we use this to interface with our bots?

A quick google on WiFi protocol told me that it is technically referred to as the 802.11 protocol.

The Xbee transceivers can also form a wireless network using the 802.15.4 protocol.

Ok. I have started my first custom robot! I'm going to call him "Luigi" cuz he was going to be controlled by an Arduino, but I decided not to. But its a cool … Read more

How to wire a bumper switch

Wire it like this picture and "jump" would be the code that is executed when the button is pressed...

Switch_picture.jpg

How to program a shortest path choosing robot?

How to program a robot so that it can choose shortest path between point A and B with obstacles inbetween. I am totally new to this so please please help me. I will enter the coordinates of the obstacles and the robot will have to choose the shortest path from point A to B

Thanks,

Much Appreicated.

First off I have found no way to get gEDA and PCB to work properly in Windows. RobotGrrl used/uses it on her Apple machine. Read more
Calculates the distance and reports to an LCD
Using a
Hello LMRians, After finishing as runner-ups in the line following section of the Yantra 2.0 Robotics Competition, the organizers provided the team  a Roboduino, … Read more
TTL serial converter cable which will allow for a simple way to connect serial TTL level devices to USB. No MAX232 or other level converters needed. It works very … Read more
Wanders around without bumping into walls, guards small area, sings.
Using a
Ajax is my first robot, he is based on the LMR "start here robot" with a few extra features. Ajax is 32 centimeters tall and about 1 kilogram in weight. His body … Read more
Price: $1.5 USD

 Collected by one member
The GM3/GM9 gear motors have convenient holes for mounting, but these precision laser-cut steel brackets add to their versatility! Read more

DC motor control with Arduino

Ok, so i had this running just a few days ago, but then when i tried to assamble it didnt work out for me. Now I cant even get this simple DC motor running from the arduino, or to be more precise; the motor will run at a very low speed. Connecting it directly to my two 1.5 batteries it will run at full speed, but when trying to control it from the Arduino it wont work for me.

 Here is my setup:

simple_dc_motor_sch.jpg

and the code is dead simple: