Monthly Archives: December 2011

Phototransistor as robot mode switch

Here’s the thing about cheapbot: as soon as you program it, it wants to go. It really needs a mode switch with two modes: one to accept commands, and the other to execute them. Also I want to be able … Continue reading

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Arduino and Phototransistor

Here is the experiment with the photocell replaced with a phototransistor, the NTE3034A. Here is the flashlight OFF data from the Arduino IDE serial monitor: Here is the flashlight ON data: This phototransistor is actually designed for infrared, so I … Continue reading

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