Monthly Archives: May 2012

Grisbot in Acrylic

Here’s Grisbot in baby-blue acrylic. I was hoping to laser-cut it tonight at StudentRND but after getting into the design work I realize that I probably won’t be ready until next week at the earliest. At any rate, at least … Continue reading

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Grisbot II design

This is a double-decker design which: (1) secures the servos to the chassis (with bolts/screws not shown) (2) renders the breadboard more accessible (3) uses dual sensors This one probably won’t be built, but it’s on the way to something … Continue reading

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Grisbot in sketchup version 2.0

All the nicely drawn components are, of course, downloaded from Google Sketchup 3D Warehouse. Thank you, Public Domain!

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Dual Sensor Communications Protocol

Photoresistors are cheap, and the ATMega328 chip has spare analog pins, so why not use a dual sensor configuration for the GRISbot communications protocol? Here’s what the sensor cowling looks like with two photoresistors (aka LDRs) inside: Likewise the screen … Continue reading

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Protocol Layers for GRIS Communications

Years ago, I tried to read a book on telecommunications protocols. I didn’t get very far before learning that there were such things as ‘protocol layers’ that made the subject a lot more complex than simply translating voltages (or light … Continue reading

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GRIS bot photos

Here she is, the integrated prototype. Note the cowling is fastened on the back and that the breadboard has just the ATMega328, not the whole entire Arduino board. An overhead view showing the arrangement of the servos, wheels, breadboard, and … Continue reading

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GRIS bot circuit diagram

I’ve been working on this thing for months now, and it seems rather odd that only today did I think to make a circuit diagram. I think this is correct. I’ll get around to posting a photo soon too and … Continue reading

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