Category Archives: Uncategorized

My Twitter Experience

Posted on July 29, 2023 by engineerzero

I got up to 300 followers and was hoping to have over a thousand by the end of the year. But that’s not to be. Anyhow, I’ll try to focus more on blogging now.

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Chat-GPT is stumped by a logic puzzle

Posted on March 10, 2023 by engineerzero

>There are three guys. They will answer questions true or false. One guy will always tell the truth. Another guy will always lie. The third guy will randomly tell the truth or lie. You are allowed to ask three questions … Continue reading →

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Controlling a Robot Arm over the Internet

Posted on February 21, 2023 by engineerzero

This is the setup that I used to control a robot arm over the internet. Starting on the right, there is the robot arm, an OWI-535 kit which I assembled last August. Moving to the left, there is interface circuitry … Continue reading →

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DC Motor Control: H-Bridge and L293D chip

Posted on September 7, 2022 by engineerzero

My OWI-535 robotic arm (link) has DC motors, which are controlled by mechanical switches. Here’s what the schematic looks like for each motor in the robotic arm: Since there are five motors, there are five switches like this. This type … Continue reading →

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Nooli Dots

Posted on April 15, 2021 by engineerzero

I wrote a memory match game app. It’s free with no ads or in-app purchases on Google Play. Here’s the link: Nooli Dots

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Timesense, a science fiction novella

Posted on July 7, 2018 by engineerzero

Free July 7-8 on Amazon Kindle: For millennia the starship voyaged from Sirius to Sol. It seemed as dead as any sterile asteroid drifting between the light years. Nothing moved within the frames of its unlit portals. Aside from the … Continue reading →

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The Ten Million Ton Space Elevator

Posted on June 15, 2018 by engineerzero

Carbon nanotubes are often assumed to be the sole viable material for the construction of an Earth-based space elevator. However, carbon nanotubes in the lengths required for construction of a space elevator remain a laboratory curiosity. Is there an alternative … Continue reading →

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Graph of IQ vs. US Household Income Percentiles

Posted on May 24, 2018 by engineerzero

Here’s a graph that I made of IQ vs. US Household Income percentiles.  In other words, I looked up the percentiles for IQ and cross-referenced them with the percentiles for US Household Income. Of course, financial status is a function … Continue reading →

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Multi-mode pen light: ATTiny85 with RGB LED

Posted on September 26, 2017 by engineerzero

This is a bread board prototype of a multi-mode pen light. It shines white, red, green, and blue light. Intensity is adjustable. Strobe, emergency flasher, ‘psychedelic,’ and candle simulation functions. It’s powered by a USB phone battery charger pack and … Continue reading →

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Beyond the Blink: RGB LED multiple lighting effects with arduino, push button, and potentiometer

Posted on September 11, 2017 by engineerzero

Ever want to do more with an LED than just blink? This circuit and source code demonstrates some creative possibilities for lighting effects with an RGB LED. CC has descriptive subtitles. Sorry for the poor phone video quality. Here’s a … Continue reading →

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