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Category Archives: Uncategorized
ATMega Ohmmeter
As I get older, it’s harder to read the color bands on resistors, and frankly, sometimes it’s hard to tell the oranges from the yellows and reds, the greens from the blues, and even the browns from the blacks. Taking … Continue reading
Minigris wiring revisions
Well, I did notice that the servos were going to nine volts rather than five on yesterday’s schematic, so I fixed that. Also deleted the connection to AREF per this. But I couldn’t even get the LED to light up … Continue reading
Mini gris on a mini breadboard
Here is the wiring diagram for the mini gris mini breadboard. As soon as I post it, I’ll realize there’s something wrong. So we may as well get it over with.
Posted in Uncategorized
Tagged breadboard, grisbot, minigris, robot, robotics, wiring diagram
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Minigris Assembly Begins
I went to Metrix this afternoon (Thursday) and got the acrylic cut, and then I rushed home and attempted to assemble the robot. Here are the pieces with the protective wrapping still on them: Ten minutes later, I’m still peeling … Continue reading
Grisbot test rig
When I finished assembling this test rig on late Tuesday night, I sat back and stared and realized that maybe I’ve actually accomplished something. Such a weird feeling! The test rig is mounted on a small kitchen chopping board that … Continue reading
PC to Arduino to LED Control, Source Code
Due to popular demand, here is the source code for my blog entry, “PC to Arduino to LED Control.” First the Processing Source code: // ButtonProc // Make a button on the screen that can be clicked // and cause an LED to turn on and off in synch on // the Arduino. Used in conjunction with ButtonArd. // import processing.serial.*; Serial myPort; // Create object from Serial class int val; // … Continue reading
Robot assembly order is important
When I attempted to assemble the first laser-cut casing for grisbot, it was a learning experience. In particular I learned that design has to accommodate the assembly process. So that’s what I’m trying to anticipate with minigris. For example, in … Continue reading
Posted in Uncategorized
Tagged assembly process, design process, laser cut, minigris, robot, sketchup
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Mini Grisbot with tabs and slots
Here’s an expanded view of mini grisbot. I tried to learn from previous experience and incorporate design changes accordingly. Indeed, this design is probably going to change as well. Just so we’re clear, minigris is a very small robot:
Mini Grisbot in Sketchup
It’s about three inches long by two and a half wide. Driven by two micro servos, controlled by an Atmega328 microcontroller. I think I’m about ready to put in slots and tabs and take it to the laser cutter.
Continuous rotation micro servo
Here are two Hextronik HXT900 microservos which I have modified for continuous rotation. These will provide the propulsion for the latest version of Grisbot. HXT900s are about the cheapest microservos out there. I’m planning to buy mine at Hobby King … Continue reading
Posted in Uncategorized
Tagged continuous rotation, grisbot, hxt900, micro servo, servo
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