Let's Make Robots!

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lightbulb.png Help others with what you have learned: Tip or walk through
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You must only make it out of scraps and the point of  this is to get pepole to make robots out  of wierd and scrap stuff. the main point of this challnge is to … Read more
Introduction This tutorial will explain the basics of hobby robot design and covers many subjects. I have includes numerous links to explain various subjects in … Read more
    My Pi looked a little naked so I made it case, its intended to be snap fit " no screws needed", prints in four parts top, bottom, front and pin cover. Read more
Builds a probabilistic occupancy map from sonar sensors
Hi everyone,  this is my first robot project not only on LMR but at all. In November I decided to build the apparently classic Dagu Rover 5 with the awesome … Read more
About the robot: It's a modified RC toy (about 0.5m tall). Beside driving this robot can move it's “waist” to bend forward and backward, move the arm's inward … Read more
It's a multi-functional PCB fabrication robot
Diyouware TwinTeeth is an open-source PCB mini-factory targeted to the electronic hobbyists. It is an innovative fabricator of Arduino™ shield-size PCBs which … Read more
Last week I bought an Arduino Yun from my local Radio Shack. It was on clearence just as all the items there due to closing :( Read more
A doorbell for unwanted guests (aka Useless Machine) with PIC12F1840, a mechanical finger moved by a geared DC motor, a L293D driver, a limit switch and a … Read more
Hacked hexapod toy that can move autonomously with a phone as its brain
2015-02-22: Another update! The Arduino code is done. The command set for Hackneyed has now been expanded to support the 4 ultrasonic sensors and the head encoder. … Read more
Here is the new XLR-6 Mech Warfare Ready Hexapod. 12 servo leg system with a center under mounted servo for the custom 3d print swivel base. HD wireless cam, HIgh … Read more
This guy is curious and will explore its surroundings. Equipped with GPS, compass, cameras, ultrasonic sensors, infrared distance sensors, sound, light, pressure, temperature, humidity.... it wants to explore.
This is my robot "Earth Explorer One". My inspiration are the Mars explorer robots and after many years of wanting to build one, I've finally started. Now I would … Read more
The XLR-ONE Robot is a sleek and stylish 30" EZ-Robot powered robotic platform reminiscent of the robots we grew up watching in the movies. The XLR-ONE has a … Read more
I am currently developing an new robot - Neurono. The robot will be controlled by a custom build neural computer. The computer consists beside of some sensor/actor … Read more
Use A4988 stepper driver to drive two DC motors instead. Make use of currentlimit to control speed.
EDIT: Some speed control, new code example and video added 21.2.2014 See below " SOME IDEAS" section for more information.     I ordered some well known pololu … Read more

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Recently collected


Recently, I have received a gift mDrawBot kit from  Makeblock. the mDrawBot kit has already&nbs… Read more
Walks down slopes using gravity, makes his owner smile.
Wobbly is a 3D-printed, gravity-powered, walking automaton. He basically walks down slopes. Read more
There are many ways to build a robot, from scratch a kit, a prebuilt system or combination of any of these methods. The path we will take here will be mostly from a … Read more
Hello all, This is my first robot with programming so I would be glad, if you gave me some tips if you find any issues in the code. My robot is based on an AT-AT … Read more
Made a simple robotic one finger piano plinker using two servos, Arduino Uno, some aluminum flashing and a fishing pole for the sliding rails. You get a gold star … Read more
A study on PWM outputs at Tiva C Series TM4C123G Launchpad Evaluation Kit (EK-TM4C123GXL)
After some months form Read more

Problem with HC-SR04 distance sensors

Hi Everyone,

I have been finding that I get erratic distance measurements on my tests with the HC-SR04 sensors. I put together a circuit with 128x64 OLED SSD1306 I2C display (Really like that module, by the way) connected on a breadboard to Arduino Nano v3.

The idea behind the circuit is:

Use the NewPing library to generate a distance measurement in centimeters.

Print the distance value to the screen, and keep on repeating.

As the sensor is moved around (8V lipo battery connected to Vin and Ground) you can see the distance updated on the tiny screen.

Help with power circuitry

Ok so followng the advice in this thread and from these forums I have now bought a 7.4v and an 11.1v Turnigy LiPo rechargeable batteries (different voltages to be used in different applications).