Monthly Archives: December 2012

Robot Sentry Duty

Obviously, there’s going to be course error buildup. I don’t think encoders would help that much. I’m thinking of navigation beacons, like so: (Maybe infrared? Hmm . . . . ) Advertisements

Posted in Uncategorized | Tagged , , , | Leave a comment

Naked ATMega circuit layout

This is related to the previous entry and shows the circuit diagram and breadboard layout for an ATMega removed from the Arduino prototyping platform after being programmed. The wiring layout on the right isn’t mandatory, of course, but it does … Continue reading

Posted in Uncategorized | Leave a comment

The Naked ATMega

Why take the ATMega328 chip off its happy home on the Arduino to sit naked on a breadboard? Because Arduinos cost $22 while the ATMega328 with Arduino bootloader runs about $1-2 plus a dollar for the support components and a … Continue reading

Posted in Uncategorized | Tagged , , | Leave a comment

Surgery on a servo

Servo drift occurs when the potentiometer shaft (the one on the left in the photo) turns from the centered position (ie 90 degrees). I tried to prevent servo drift by soldering the pot shaft in place, but apparently all I … Continue reading

Posted in Uncategorized | Tagged , , , | Leave a comment

Servo Center Location Test

It looks like the climactic scene in a monster movie, Arduino vs. Bot. In reality, this setup enables me to keep the ATMega328 chip on the Arduino while I upload test programs to locate the servo centers. According to the … Continue reading

Posted in Uncategorized | Tagged , , , , , | Leave a comment

Minigris test matrix demo

This demo shows that the mini grisbot (graphical robotic information system) test matrix has been successfully completed, with photocells and servos functioning and integrated. (And special thanks to Adafruit for the link yesterday.)

Posted in Uncategorized | Tagged , , , , | Leave a comment

Minigris test matrix

Since minigris did not perform as hoped, I’ve had to go back to basics and rebuild the circuit, testing at each stage. Hence a test matrix, where I build the circuit with a component added, write a test program, test … Continue reading

Posted in Uncategorized | Tagged , , , | 1 Comment