Let's Make Robots!

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wrench_orange.png Your work in progress or a finished robot: Robot project
script_edit.png Write in your own blog: Blog entry
comments.png Discussions and questions: Forum topic
brick.png Show what you are making robots of: Component
lightbulb.png Help others with what you have learned: Tip or walk through
link.png Add a good web shop, a guide or a cool link: Web link
Navigates around via ultrasound, turns on the lights when it gets darker, looks just awful and feels raped.
Using a
First of all, hello LMR! I'm new here so very impatient to learn everything and meet everybody. I saw this website few months ago and instantly fell in love with … Read more
Curl is a small mobile robot designed to implement simple autonomous obstacle avoidance behaviors and to be easily expandable. It is cylindrical, 5 inches diameter, … Read more
i've made a arduino serial and a AVR downloader for make robots.  Read more
This is my first robot, I used: Microcontroller Microchip 18F2221 C language programming, free C18 compiler. Servos HS311 Xbee radio I designed the PCBs using eagle … Read more
Avoids obstacles, follows the line
Using a
This robot is a line follower for ISTROBOT competition (www.robotika.sk/contest).   It's brain is ATmega16 AVR connectable to the PC via Bluetooth - this allows to … Read more
This project is a collection of experiences related to seeing and percieving the world from the point of view of robotic creatures. Robots will send sensor data … Read more
I am modifying this publix truck to make it a lille more fun for my son, and so I can learn a little in the process. I got the LED's in for the turn signals and … Read more
Announces the time using your voice
Popcorn is a tribute to the time-of-day announcement service.  Here's a demo; Read more
You may think this is a strange tip, but I am very serious; Someone should have tipped me: Get an oscilloscope!
I am sorry if this seams like a strange tip. But the point with the tips are to let other know what you have ecperienced / learned / would have wished someone would … Read more
This is a controller i built a while back. I wasnt going to post it till i had a use for it but that might be a while. It uses a RBBB arduino, Radio shack project … Read more
This project is my very first robot project. It has a cybot foot base with 2 DC-motors and 1 wheel in front. I use an Arduino processor as his "brain". For now my … Read more
 this is my first robot using arduino , it uses a l239d motor driver and is basicaly my atempt at making a start here robot . Parts list : 1) arduino starter pack … Read more
Launches anything you can put in it
This is something I made because I wanted to be able to fire something from a robot. On the inside of the end cap there are two insulated wire holders that are used … Read more
Measures your pulse/heart rate
The circuit shows a sensitive finger-type pulse detector. The concept of the circuit is simple. With the alteration of the blood volume in the finger the … Read more

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




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).