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For object avoidance, the ultrasonic or the ir range finders do not always see and object and i often notice my robot running into things and getting stuck. I … Read more
Sometimes the pins you want to use on a microcontroller are this type.
An open collector or open drain are output pins that are made of a transistor with no connection on top. Without external circuitry they can't really be used. What … Read more
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
Controls two bi-directional low power DC motors
Hello LMRians, Ever tried using the pololu tb6612fng dual motor driver? Quite handy if you are thinking of controlling two low powered DC motors. It can handle a … Read more
Robust superstructure which can be relocated to other vehicles
I have written this to assist any other builders out there who have been thinking of using Maker Beam. I decided that I wanted to build a more rugged … Read more
Determine the distance to a detected object with a single camera and no other sensors
If you have OpenCV code that draws a rectangle around a detected object but want the code to know the distance to the object, no need to add another camera or any … Read more
Possibly helps to detect objects, walls and holes.
 Some fancy nice ultrasonic sensors can read multiple echoes of sent ultrasonic wave. Cheap senosrs register the first echo that arrived back. If we could listen … Read more
A brilliant free robot control software that lets you assemble services to add functionality.
Hey all! I'm so excited by my first experiences with MRL ( http://myrobotlab.org/ ) that I thought I might post a video that I just made. I am currently finishing … Read more
Controls servos by Angle Accurately
I have always seen things differently with my electronics and programming background. Servo Math came from me seeing servos as having three parts. The angles … Read more
Helps those who don't have access to a solder or doesn't have the correct jumper wire
Any people out there who don't have an access to a solder or don't know how to use one, doesn't have the correct jumper wire, etc., consider this cheap (actually … Read more
Expands PWM outputs for servo control
     Those who intend to build a more complex project (in this case I mean with more DOFs, like a hexapod, biped humanoid and others) may find dificulties if … Read more
Performs speech recognition and control a few LEDs. It can be used to speech control anything.
  In this project I connect my Arduino Board to a WiFly module (https://www.sparkfun.com/products/10822) from Roving Networks and stream audio to the PC, so that … Read more
Teach Kindergarden Kids about Chemistry and Electronics
Do you want to make it possible for a kid to make electronic circuits?    Make Squishy Circuit play dough and make up some challenges. Do you want to teach your … Read more
Charges your robots batteries while its on the move
Hello everyone. I decided on building a solar panel using solar cells to charge the batteries of my robot while its in use. (so that i have even longer run … Read more
I updated my program with full insert and delete. No networking or display. No plus formatting. Just a good E-Prom editor. Make sure you have strings before using … Read more
makes 'handy' holes on PCBs
Do you lack power tools (power drill, dremel, etc)? are you wary to use them? are you unable to get proper drilling precision because  you lack a drill stand? … Read more
Pro: sticks well cheap? easy to use   Cons: kinda dangerous...got burned several times... some are very flimsy, so be careful may be frustrating Read more
Shift registers has been mention again and again to free pins for both input and output. This is just another example. I need a LCD display, some buttons, sd card … Read more