Category Archives: Uncategorized

Orbital Hydrogen Collector

Posted on May 18, 2015 by engineerzero

Deep space missions will require the placement of large quantities of hydrogen in low earth orbit for use as spacecraft propellant. Procuring hydrogen in low earth orbit from the surface of the earth via chemical rocket booster can be relatively … Continue reading →

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Eye Robot, the Continuing Saga

Posted on April 22, 2015 by engineerzero

My original plan for making a robot with visual pattern recognition was to connect a camera to the raspberry pi, and then the raspberry pi to my laptop, and then I would run the raspberry pi ‘headless.’ That means, I … Continue reading →

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Eye, Robot (Part One)

Posted on March 26, 2015 by engineerzero

I’m toying with the idea of a robot that can interact with its environment by pattern recognition. I thought the way to do this was with a raspberry pi computer. So I bought the computer and the pi camera from … Continue reading →

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Rocket Ship Freedom free for today (Dec 16)

Posted on December 16, 2014 by engineerzero

Rocket Ship Freedom This is a YA novel I wrote eight years ago about a single stage to orbit rocket that travels to the Moon. It doesn’t come back, so how the crew gets home is something you’ll have to … Continue reading →

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The Wizard from Earth

Posted on October 9, 2014 by engineerzero

My science fiction novel, The Wizard from Earth, is available on Amazon Kindle as an eBook. It’s selling for only 99 cents. If you don’t have a Kindle, you can still download the free Kindle Reader software, and read it … Continue reading →

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Kind of a resume

Posted on September 13, 2014 by engineerzero

I’m looking into tutoring again and thought it might be useful to list a few links that illustrate what I’ve done. I may not have done the right stuff, but I have done stuff. Arduino Park: Grisbot 2-obstacle course: Grisbot … Continue reading →

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Rocket Ship Freedom available for download

Posted on September 8, 2014 by engineerzero

Rocket Ship Freedom Rocket Ship Freedom is my YA novel about a teenager who gets an internship at a private rocket company and ends up going to the Moon, where he discovers a deadly mystery that threatens the survival of … Continue reading →

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Ultrasonic toggle switch

Posted on June 1, 2014 by engineerzero

This is an idea for using an ultrasonic distance sensor (aka ‘pinger’) as a toggle switch. I’ll show it first and then explain: As the hand approaches, the yellow light comes on to indicate that the switch is in aware … Continue reading →

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Debugging Touchless Technology

Posted on May 29, 2014 by engineerzero

The comment that I added to the previous post was not the full solution to having a row of touchless buttons, but it set me on the way. A second pinger IS necessary to discriminate against anomalous readings. In the … Continue reading →

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Touchless Technology with ultrasonic distance sensors

Posted on May 27, 2014 by engineerzero

The concept behind this circuit design is that you can press buttons without touching them. As your finger lowers to the tabletop, the yellow light will come on, indicating that you are on the correct approach. Farther down, the green … Continue reading →

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