Let's Make Robots!

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cr4cX H-Bridge

The cr4's H-Bridge is builded with MOSFET and BJT transistors and specialized low-side driver IC.

In my tests the bridge has worked at 32KHz PWM frequency with virtually no heat generated.

Two of these (one for each motor) are used in cr4.

The bridge prevents the shoot through conditions and allow the following operating modes:

  • pwm cw rotation
  • pwm ccw rotation
  • pwm brake
  • brake
  • coast

Maximum supply voltage is around 18V and maximum current through the motors is limited by the IRF9540 MOSFET caracteristics.

Helps new PIC users learn the basics
The PIC tutor board features everything a beginning PIC learner needs. It features the 18F1320 Microcontroller, 4 ADC lines, 6 LED's, connections for a Motor … Read more
Ultrasound navigation, reacts on nearfield bodyheat, detects light
Using a
This is my first autonomous 4WDBOT on a DfRobot Base.I try to keep all mountings as clear and functional as possible - no decoration parts. Update: After some … Read more
Improves the obstacle recognation of Sharp IR distance sensors
Sharp IR distance sensors are very often used in robotics. But I always found it annoying, that they do not recognize very small objects, chair legs or even walls … Read more
The Robotic Tank you see here was capable of speeds approaching 10MPH With myself on it. Powered by 2 250W electric Scooter motors, it was a very large project. The … Read more
Line Laser scans object while recording position of laser with software. Allows capture of 3D object into software.
Using a
Intended for use with David Laser Scanner software. After completing the CNC machine, I decided to build a scanner using my new machining ability. Using an Arduino … Read more
Pushes other robots out of a ring.
Using a
1/18/2011 - I still haven't decided what color to paint it, hence the Pink or Black in the title, but it's almost operational. I've got the line sensors, … Read more
Here is my custom controller version 2. I made it so I can have some input to my robots and get information back. It is a simple design. It has a LCD, Xbee, custom … Read more
It goes around just like an RC car but it's much more fun because it's floating.
Using a
Here's another project that I have, it was a physics project for school but I thought I could put an Arduino somewhere in there and make it more interesting, and it … Read more
To start, I'd like to say this is my first robot, but, since I had electronic- experience, and so many people have done the SHR, and I had a good idea, B.I.L. was … Read more
Hi, I started with a clone from OddBots Chopsticks spider robot. I have used 8x12Kg servos and 16x6,2Kg Servos from TowerPro Servos I also buyed the spider … Read more
The rover drives around avoiding obstacles using the PING))) ultrasound rangefinder.
Using a
So this is my first robot report. It's on the first robot I built too. To say it from the beginning, I'm sorry I didn't put the LMR loge on my videos but I made … Read more
Navigate around with ultrasound
Using a
Updated my story, since it was all a bit long and (to most people, probably) boring. Read more
This is my first project and it will most likely take me an inordinate amount of time due to the fact that i'm in school at the moment but i will go as fast as … Read more

Hello World!

Hello evrybody!

I am so happy to be a member of LMR, I will post all my robot projects soon.

But let's start at the beginning, shall we?

I started making robots almost two years ago, it was summer break and I was bored. The main reason I started is I like physics and programming and I thought robots are the best way of combining the two. And it's fun. I started making robots and I will NEVER stop. I want to learn more and more and that's what I do with every project I build.


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




Recently collected


This is OSIRIS a rover style robot that I will hopefully modify with autonomous gps control. Right now it is controlled with a 2.4 gigahertz aircraft radio and a … Read more

Open FURBY

Open FURBY is an open community-based project with the goal of providing low-cost social robot platform based on FURBY® toy from Hasbro®.

Cutting Acrylic sheet

I've been asked how to cut acrylic with a hot wire cutter - I made my own and there are a few plans for how to do this on instructables etc. This was my take on the idea which I find works OK for me... - see the file attached

Droid functions similar to a Spring Flamingo design for the legs, upper body balances like a "hoverboard" at the hips. Remote control is done with a vr headset, and … Read more
Hello. This is my Johnny Five robot from the movie Short Circuit 1&2 it came as a very plain and simple kit. I have done many modifications to it and I'm happy … Read more
Talk with Arduino via Speech / Voice Recognition Module
How to: Arduino Voice / Speech Recognition  with Geeetech Module [Tutorial].  This video will show you how to talk with your Arduino with the (cheap) Geeetech … Read more

Botboarduino drivers

Ok guys it's been a while since I've been on I'm glad everything is picking back up.

I recently had to wipe my computer after getting a virus. Which means I lost all my drivers and code and etc. I managed to get arduino up and running but my botboarduino needs drivers to work. I'm kinda freaked out about catching another virus and I can't seem to find the correct drivers for ft232 uart. I tried one place but it keeps asking me for a password to open it. And when I point the device manager it refuses to see the zip file.

My artificial neuron approach

February 12, 2015

A single artificial neuron can represent some simple Boolean functions like OR, AND or NAND and some like XOR not, because a single artificial neuron can only learn linearly separable mappings.

Example. Perceptron for the AND function: