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
Here goes 812-R8. I really wanted to get something posted as this bot has been sitting here for almost a week now. More details and photos will be added later … Read more
Hey guys, Figured I'd share some of my more recent work; Dragoon. This is an RX-64 based quadruped robot using an ArbotiX Robocontroller and the new & … Read more
Howto make sound without any sound transducer using only the DC motors of your robot.
Description: I  am just start to play around with the new Arduino Tone library, when I realize that I have no sound transducer laying around here. Than I remember … Read more
Hi guys (and girls) I need some help here. I’m trying to make a beads sorter for my kids, but my funnel approach is not working. Read more
Cheap 4WD off road chassis for your robot
The chassis of the "Rebound" is perfect for small off road robots. The PCB has a radio receiver and dual "H" bridge. This walkthrough shows you how to make the … Read more
Runs around bumping into stuff
One of the first ‘robots’ I built was a Beetle bug based on the intractable found … Read more
Navigate arround using 2 IR Leds and an IR receptor
Using a
This is PJBot version 3. The brain of this Bug is an Arduino. Now, it only go rolling and  avoiding obstacles that it detects with 2 led's and 1 IR receptor. Read more
This is the fusion of my old Qwerkbot project and a 4WD base, with omniwheels replacing the originals. I've also attached one of Oddbot's compound IR sensors for … Read more
Free program for drawing complex flow charts
It’s always good practice to draw a flow chart before start coding. That will save you lot of debugging problems and the structure and flow of your program will … Read more
wanders about trying to avoid stuff
Using a
I give you "Survivor Bot 08M"... if your wondering about the name, well my sister (a full grown adult) picked the robot up and thew it across the room, smashing it … Read more
Walks around autonomous
Using a
Hi i'm from Romania and i am 17  year old.I am in robotics from age of 13 and i will show you my scrap built 4 legs walker.I have started with two old servos and a … Read more
Wifi controller, autonomus, gps, wifi camera, mp3 player
Using a
 UNDER COSTRUCTION  UNDER COSTRUCTION  UNDER COSTRUCTION   Hi everybody (first for all sorry for my bad english), This is my first robot. This is an autonomus … Read more
Take impressive pic's of your bot with this box
In this walk-through, I'm going to show you how to make a box in which you can take awesome pics of your newest creation for cheap! With it, I took this pic of this … Read more
Obstacle avoider. Other behaviours planned.
Using a
Early March - GREAT PROGRESS - Giving it a brain, and a problem solved. I've built the brain-board with its 20x2, pluggged everything together and IT'S ALIVE! - … Read more
A mechanism with a one-track mind.
This is something I built a while ago.  I won't call it a robot as it's very limited in its function - It only knows about FORWARD!  It was just an idea which I … Read more

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




Recently collected


Drive around and shoot BB's
17.04 - Partial encoder success It's alive!(kind of). The movement in the video is a bit slow and jumpy as I am filming with one hand and using two joysticks with … Read more
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.