Let's Make Robots!

Robot From RC Car with One Motor


Can anyone point me to a tutorial or the like to help make a simple robot from a single motor RC car. I know two motors are more popular and would be better but at the moment I only have 1 x RC car with a single motor and I gues a small actuator for the steering.

My thoughts were that I could control the drive motor and the actuator for the steering using a compatible arduino nano like this:

Pedophilic crawler?

 Viewing some of the robot chassis on aliexpress and came upon this one that is called a "pedophilic crawler".  Is there another definition I am not aware of or is it a bizarre translation error? 

Good for a laugh either way! Ed. 

Screen shot

Stuck on my first project (Motors)


I have started building the Starter project on this site under Start Here section and while I have managed to do most of it I am stuck on two parts and was hoping for some help.

I have managed to get to the part where I program the servo to turn and do Servo Fun part of the build without a problem.

Motor Problem

The when testing the motor to see if they work is the first issue. I program the instruction for 

high 4

low 5

Need someone to write a review of the Overlord 3D printer

YOU decided who is getting a Overlord 3D printer for free!!!

The lucky winner ist Mr. jinx....congratulation!!!

UPDATE Feb. 3rd:

help me to make my balance robot standup right


I made my first self-balance robot using:

-arduino uno

-TB6612FNG dual motor driver

-motor DG02S


-châssis home made

-Kalman filter

-PID for PWM

-DFrobot battery 7.4v 2200 mAh

the problem is:

when pwm is under 50 the motor don't move !!

Christmas/Birthday Shopping

I have a friend who has and Arduino Uno, but hasn't used it for anything. While he does have access to tools and soldering irons, he is reluctant to do anything with the arduino, being far more interested in programming on his computer. I want to take advantage of the holiday/his birthday, and find something that will let him apreciate the arduino. Any ideas?


He is a freshman in high school, and is competent in electronics, and a far better programmer than I am.

     Thank you in advance, Kidbot

Couple of questions with Dagu T'Rex Controller

Hi Guys

Just trying to get my excellent new controller board up and running in my project. I'm only using the left motor and nothing was happening but have found from searching the pin assignments are not correct in the sample code is that right? I've switch around right and left and can now operate the motor, but current sense isn't working. Before I spend too long debugging I was going to try and get a correct list of pins in case maybe the current sense pins didnt need to be swapped?

Take that Apple!

After 5 stupid-ass denials, finally released a dead-simple serial terminal for iOS.  It neatly connects with an HM-10. :)

My sponsor was:

(Salt-water aquarium pumps contoller.)

Searching for a different 3D printing alternative

First post. After using 3D printers for the past 4 years, I'm in need of another way. Actually a less expensive way. I design and produce professional pitching horseshoes. I use 3D software (MOI) for my design work and output .STL files for 3D printing. I generally have two copies printed. My cost -- $238 out of pocket. There are no 3D printing service bureaus able to come close to that price.

NEW ServoCity Gearmotors with Encoders

We're excited to announce the release of our new Actobotics gearmotors with encoders. Offered in 11 different speeds ranging from 27 RPM to 2,727 RPM, you're sure to find the perfect motor for your next project!

Mini Driver Mk II - S4A compatible

For some time now I've been wanting to release a new version of the Mini Driver with the ATmega328P. Then the Boss asked me if our controllers were S4A compatible (Scratch 4 Arduino). Now we do!

Video of Doodle Bot using this board can be seen here: https://www.youtube.com/watch?v=j95dTWg2-d0
Click on the picture for a larger image. Check out the features listed below!

robot starter kit IR sensor reading

I bought the starter kit recommended on the webiste and put everything together everything was going fine until i got to hook up the IR sensor and get its readings back.

all im getting is 242-245ish it seems like its oscillating at the top end of the readings, dosent matter if you cover the sensor or not the readings just keep oscillating.

can anyone tell my if i have a bad sensor or whats going on? i appreciate the help!

To run a continuous Servo with Higher Voltage Source

Hi All,

I am very new to electronics and Robots. I have been trying to run a continous servo motor  4v to 6v. I have a battery power source of 9v.  

I have the following question.

Since my power source is higher than my required voltage I wanted to use a resistor to lower the voltage, so my motor is not going to get damaged. I used the following formula to find out the resistor required to get this voltage.

R  = (Vin - Vout)/current required 

which is 

(9-6)/.01 = 300 ohm 

Small Inexpensive Solar Cells and Motors - Beam Robotics


Can anyone recommend a supplier of inexpensive motors and solar cells for BEAM robots, preferably UK based.

Its for a school robotics club, the kids will need to buy the materials hence it needs to be inexpensive.

Here is an instructable that I have found, but something that moves a little more would be more exciting for the kids:



Cheap Simple Robots


I am starting a Robotics and Computing club at my School and need some ideas for some cheap, simple robots that I can get the kids building.

The idea will be that they / their parents buy the materials based on info that I supply and I help them build there robots during the club (aprox 6 hours total).

I don't really want Maplins type toy looking robots and anything with a microntroller is hoing to be to expensive. The topic for the term is renewable energy and climate change so recycled robots may be on the cards?

How i can links to components used in my robot?

info panel

How i can add links to what is used in my robots like the panel in the image?
Adding info in additional information seems not working.

We search talented persons to join our start-up !!


We create the first companion robot for the whole family, and we are looking for talents in robotics !! (internships, jobs, developers...)

Our robot works with a tablet and will be fully autonomous. We have already raised funds to develop the robot, so we are waiting for you.

If you want to join our team in France, contact me.



Base motor for Robotic Arm

Im looking at my options for a base servo motor for a robotic arm I've been working on. I'd like the base to rotate 360 degrees, sail winch servo's are too expensive for this project though. I was thinking of using a continuous servo, but Im not sure if there is a way to 'home' it back to the center position. Is there a way to get a continous servo to move a specific point? 

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