Let's Make Robots!

Help with code for NanoATMega328 / 2 x DC Motors / 9g Micro Servo / HCSR04 Ultrasonic Detector


I have built an obstacle avoidance bot for a School Robotics Club I had the motors running using a demo mode (spin left the right) but have just connected a servo and an HCSR04 Ultrasonic Detector and I need some help with the code to get it up and running.

The Bot uses:

Chassis with 2 x Geared DC Motors

L298N Dual Motor Controller

Control method: remote CPU: Arduino Mega, Raspberry PI Programming language: Arduino C, C++, Java, Python
After reading about Duanes Rover5, I decided to try to build my own. It is still not finished so I will update this page on a regular base. The following diagram … Read more

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? 


I've been cooped up in a hotel room while my wife is slowly getting over complications. Hopefully we leave Friday for home.

However, I did order a few things last night, including an Odroid-XU3 Lite. This is an 8 core ARM system with 2GB RAM. Think of it as a double strength RasPi 2 on steroids. I think it might be able to run some interesting AI software.

I'm hoping to run a version of OpenCog on it and compare this with the NUC.

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

Learns from Listening and Asking Questions, Tracks Colors and Heat, 6 Web Services, Database of Learned Knowledge
Using a
2/25/15 Update - The following is new: Data Tracking - To Be Followed by Learning Through Observation Read more

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.