Let's Make Robots!
Draw numbers of the winners of the LMR Donation
Using a
Introdution: This is my competitor for the LMRv4 Donor Appreciation Robot challenge. Using 5 Dynamixel AX-12+ Servos and an Arduino Mega. Programming has been done … Read more

Permanent Google+ hangout

RobotFreak's picture

We now have a permanent Google+ hangout for LMR users.

https://plus.google.com/hangouts/extras/LetsMakeRobots

What is a hangout?

Google+ hangout is a multi user video chat. Upto 10 users can join the hangout at the same time. A permanent hangout doesn't mean there is already somebody available. It just means the hangout is never ending, it is always available under the same link.

Why should I use hangout?

Embedded video: 

Dagu 4 channel motor driver fried

RobotFreak's picture

Hi,

I have fried my 4 channel motor driver and don't know how this can happpen. As you can see in the picture the Dual FET IC  U10 for motor 4 is blown away. This happened during a first test of my IOIO-SHR v2 robot. Before connecting the motor driver the program has been tested with an oscilloscope, all Outputs are working as expected. All connections has been double checked. Power supply testet with an voltmeter. Each PWM pin can be controlled from the Android phone with a Slider of my test app. PWM frequency was 1kHz.

IOIO-SHR version 2 sneak preview

RobotFreak's picture

Started this weekend with the 2nd version of my IOIO-SHR (Start Here Robot). Because Santa brought me a Rover 5 chassis on christmas, this would become the chassis for it. I got the 2WD version including wheel encoders and the motor controller board.

Here are some shots from the assembly test.

The IOIO is mounted on a carrier board with 3 pin headers for all IOs. Some Jumpers are available to select the supply voltage for the IO headers, 3.3V, 5V from the IOIO or external servo voltage.

Introduction: The IOIO-SHR is my first attempt in using Java to program a robot. Using a Sparkfun IOIO board to control the hardware and an Android phone as the … Read more
How to use timer and interrupts on Arduino boards.
This tutorial shows the use of timers and interrupts for Arduino boards. As Arduino programmer you will have used timers and interrupts without knowledge, bcause … Read more

Google+ anybody?

RobotFreak's picture

Google plus is the new social network platform and has been launched as Beta last week. It's a little bit tricky to get an invitation for an account. If someone is interested to get an account, I can help.

Spurt is a brainless line following Beambot. It is based on the Spurt-Mobil from the University of Rostock / Tech. University of Berlin. It is a very cheap robot … Read more

FezBridge - Android Debug Mode meets Fez Domino

RobotFreak's picture

FezBridge is an Implementation of the Android Debug Bridge (ADB)  on a .NETMF device, the Fez Domino from GHI electronics. It is based on the MicroBridge project from Inopia alias Romfont. The ADB is available on most Android phones (Andropid v1.6 or higher). This is one of the advantages against the Android Open Accessory mode. which runs only on a few phones.

Embedded video: 

Android Open Accessory DIY DemoKit

RobotFreak's picture

At the Google I/O 2011 the new Android Open Accessory Development Kit (ADK) has been published. This allows to connect Accessorys to your Android phone and communicate between the Accessory and the Android via USB. The Accessory has to implement an USB Host, while the Android acts as a USB client.

Embedded video: