Monthly Archives: January 2012

Arduino reads screen flashes with phototransistor

This is the first test of the communication system as described in the previous entry. The flashes are one millisecond, followed by a one second delay. The serial monitor informs me that the microcontroller is able to count them. Here’s … Continue reading

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Computer/Arduino Communication Via Phototransistor

Here’s the basic idea: I’ll send commands to the Arduino by flashing a rectangle on the screen and having a phototransistor on the Arduino read the light level. The above photo shows the test bed set-up. This is very similar … Continue reading

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Time to Clean Out My Spam Filter

I have a new hobby, collecting spam bot comments. Yes, I’m mystified too. Bear in mind that spam bots attack blogs because they want their comment published with its embedded link that will help the spammer promote his product. Since … Continue reading

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Robot Chassis with Plastic Ball Caster

This is the 1″ plastic ball caster that I ordered from Robotshop. The white ball pops out of the black holder, which has three bolt holes to secure it to the robot chasis. I positioned the holder on the wooden … Continue reading

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Going Dark

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Casters for a Small Robot

Poor little cheapbot is undergoing surgery this week. The purpose is to change the caster wheel, but in the end the whole chassis will be replaced. Because I’m trying to build my ‘cheapbot’ robot out of readily available parts, I … Continue reading

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GIRC test drive on blocks

GIRC (Graphical Interface for Robotic Control) is a ‘sketch’ written in Processing that enables user to draw a path file, save and reload, and transfer control codes to an Arduino-brained robot. The magnitudes of the turns and distances haven’t been … Continue reading

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