Balancing robot – without gyros

Posted by Mike Redrobe | Posted in Arduino, robots | Posted on 25-05-2012

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Bot balancing without gyros … for a few seconds at least No gyros, no accelerometers – only a sonar ranger and lots of code. The motors used are standard servos modified for continuous rotation, sonar sensor is a HC-SR04 as detailed in a previous post Code ? Well here’s a simplified portion of the PID […]

Ultrasonic robot avoids walls

Posted by Mike Redrobe | Posted in Arduino | Posted on 21-05-2012

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Using an ultrasonic sonar ranger to avoid walls – and people’s feet – before hitting them: At first I was getting plenty of false readings, so here’s the first run, pausing and verifying before turning: With faster code, and not stopping: Improved accuracy, so it detects smaller objects like feet:

Arduino and SR04 ultrasonic sensor – robot eyes !

Posted by Mike Redrobe | Posted in Arduino | Posted on 20-05-2012

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Hooked an SR04 ultrasonic sensor to my arduino board – robot eyes ! Ranger sensor uses sonar to give accurate distance measurement to objects or obstacles placed in front of it. They’re surprisingly sensitive / accurate – I was able to reliably measure to a millimeter at 15cm range. These sensors are also now VERY […]

Arduino Starter Kit

Posted by Mike Redrobe | Posted in PC Hardware, Technology | Posted on 01-03-2012

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Well, what is Arduino ? Arduino is an open-source platform for microprocessor projects, or as the Arduino website puts it: “Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It’s intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.” Basically its a little CPU that […]