Let's Make Robots!

Converting R/C Truck to Autonomous?


Hello Everyone,


L9110S logic level question.

Hi all,

For my robot I like to run my l9110s motor driver that I got from eBay and 2 dc-motors directly from a 7.2 volt battery. This should work together with an arduino nano. 

 However.. will this motor driver accept the 5v signals that come from the arduino? Or will I need a voltage level shifter?


Any advice welcome :-)


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(Coupon code can be used for all item, except the items are with discount now.)

Arduino Nano ATMega328 (CH340G Clone) is it dead


I have been using a Nano ATMega328 (CH340G Clone) this one here and its been working fine however earlier today during an upload my Mac decided to switch itself off?

Now the red light (power) comes on but it does not respond to anything else, the USB serial port is also not recognised, meaning that it is not communicating.

Dagu mini pan/tilt kit and another question

I'd like to try using the Dagu kit for another purpose (non-robotic) and I'm wondering what voltages I am supposed to feed the motors?  Also, to reverse motor direction, do I just reverse polarity?  I want to use the Dagu mount for a small camera (webcam).


How to fix suspension problems @ mecanum bot

I finally have my mecanum bot up & running and did some testing today (http://youtu.be/81F_xTLLb2w). I found the bot drifting due to a lack of traction (not too bad on the video, but erratic behavior elsewhere in the living room ;-). The alloy frame is pretty rigid causing not all four wheels always to be firmly on the ground. Looking for solutions I encountered the idea of dividing the chassis in two parts that can rotate (twist vertical) relative to each other (see pictures). My question regards the "rotation component". What is this for component and were can I buy it.

Anyone else excited about Chappie?

Not going to lie.  When I watched District 9 I had the thought: "Man, I wish Blomkamp would take on Asimovian dillemmas."  

Openscad PhoneHolder

Link to github
Actually modeled after a NGM Legend 2(an android phone), but i added a height parameter, so it can be modified.
I count to add more files later to the repo.

STL Viewer (beta)

Rotate: |

Kossel Mini Hotend Question

I'd normally ask Hoff these questions, so it's with a bit of sadness I ask others.

Does anyone know where I could get an effector for my Kossel Mini printed?  I've come to the conclusion Hoff was right about my cheap eBay hot-end and would like to switch out for the E3D v6 hotend, but my fear is I won't be able to print out the respective effector given the cheap hotend I have.

SG92 continuous rotation servos

I remake 2 continuous rotation servos sg92 9g 4.8v and put 2 resistors 2.2k and the i connect to arduino : set point to 97 deegres servo turning slow but not stop. one of motor stops and one slow spining its maybe becouse resistor ar 2.2k but inside are diffrent resistance?

Using two power supplies with one on / off switch


I have built a robot using the parts listed at the end of this post.

I have been having trouble with the code and getting the motors and the servos to work with the detector but I now believe that this is due to a lack of power.

I am only using 1 x 9v Non rechargeable battery. I can add another 9v battery or use 4 x AA 1.5v batteries.

The problem I have is how do I only use 1 x on off switch? Could I connect this to a common Gnd? 

ICStation was back to work now, Last 12 Hours Chinese New Year Sale

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ICStation is back to office now. And orders / emails will be processed in 24 hours as before.
Hurry up to enjoy the Chinese New Year offer during last 12 hours. ^_^

Need advice with first project

Hello all,

I am Ernie and have just today joined this site. I am working on a very simple device and would like some help.

I am trying to control my digital camera with a Ping distance sensor, so that when the sensor detects a certain distance, say 12 inches, the solenoid motor activates, thereby releasing the shutter and taking a picture.

This is what I have:

Arduino UNO R3

solenoid motor 5vsainsmart HC-SR04 ranging detector mod distance sensor

Remote control via IR sensors

Starting my first robot, at age 73, called Orange Crush based on color paint I used.  It's based on McCombs Ardubot II but it's going to be a living proof of concept until it falls over or the batteries won't run it.  Right now I'm trying to use Radio Shack IR sensors as a remote control.  Since these sensors will only cover 90-120 degrees, I plan to mount them in a triangle or square so one will always be pointing at the remote control.

TREX USB Power for Idling

Hello, I'm new to this forum (but not to robotics). My wife & kids bought me a Wild Thumper for my birthday and I'm having a great time getting to know it. I also have a T'Rex Robot/Motor Controller along with an ODroid-C1 that I'm adding to the system. I'm connecting the ODroid to the T'Rex controller via the I2C interface.

programing a Tiny13a directly from a mini USB board

Is that possible?

I have a handful of the tiny13a chips and would like to program them but all I have at the moment is an Arduino mini USB board. I found a couple of tutorials on how to program an Arduino Mini using the board and I found a few tutorials explaining how to program a tiny13a chip using an Arduino board but there seems to be a small gap there that I can't figure out.

Do I need to get myself an Arduino Uno or a mini or something? The USB board has a TX and RX but that's it.



Hello LMR.

I am looking for help to find a good hobbyist CNC to make some face plate or back plate for electronic enclosure, menaning engraving will be the most ue of this machine.

A full ready to use CNC, or a kit, or eventually to build one.

This is what I am looking for :

- CNC with reasonable dimension, something like 20" x20", but not definitive diemsion.