Category Archives: Uncategorized

Split Level Standoffs

Posted on June 25, 2012 by engineerzero

The full title of this post would be something like ‘Split Level Standoff Laser Cut Acrylic Casing for Robot.’ Anyhow, I added a level by using another standoff. This was necessary because the voltage regulator is too tall to fit … Continue reading →

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Laser cut acrylic robot casing with standoffs

Posted on June 24, 2012 by engineerzero

Recently, Maker Shed offered a laser-cut acrylic casing for a geiger counter. Here is a blog entry on the assembly of the casing, which shows how standoffs are used. I thought, “That looks nice,” so it was back to the … Continue reading →

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Bolting Laser Bots

Posted on June 21, 2012 by engineerzero

Okay, the title is a little bit of a joke, but this is a continuation of my efforts yesterday to conceptualize how laser-cut acrylic pieces can be assembled into a box-like enclosure for a robot. Since the pieces have been … Continue reading →

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Bolting Together Laser Cut Parts

Posted on June 20, 2012 by engineerzero

Plan A was to use acetone to bond the parts of the robot’s laser-cut casing together. However, the overarching goal is to make a kit that can be sold to kids, and it occurs to me that having ‘Buy acetone’ … Continue reading →

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Crenellated Laser Cut Patterns for Grisbot in Sketchup

Posted on June 5, 2012 by engineerzero

After much tweaking, I seem to have crenellated patterns for Grisbot that look like they just might print out on a laser cutter. How do you go from a 3D side to a 2D pattern in Sketchup? Well, it’s not … Continue reading →

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Crenelating laser-cut acrylic robot casings

Posted on June 4, 2012 by engineerzero

How do you get two pieces of laser-cut acrylic to join at right angles? One solution is to glue them together using crenelations at the edges to increase the joint strength. Crenelations are what they call the pattern on top … Continue reading →

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Grisbot in Acrylic

Posted on May 31, 2012 by engineerzero

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

Posted on May 29, 2012 by engineerzero

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

Posted on May 26, 2012 by engineerzero

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

Posted on May 24, 2012 by engineerzero

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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