Blogroll
-
Recent Posts
Archives
- October 2026
- March 2025
- February 2025
- January 2025
- December 2024
- March 2023
- February 2023
- November 2022
- September 2022
- August 2022
- April 2021
- July 2018
- June 2018
- May 2018
- December 2017
- September 2017
- August 2017
- February 2017
- June 2016
- May 2015
- April 2015
- March 2015
- December 2014
- October 2014
- September 2014
- June 2014
- May 2014
- April 2014
- March 2014
- February 2014
- January 2014
- December 2013
- November 2013
- October 2013
- September 2013
- August 2013
- July 2013
- June 2013
- May 2013
- April 2013
- March 2013
- February 2013
- January 2013
- December 2012
- November 2012
- October 2012
- August 2012
- July 2012
- June 2012
- May 2012
- April 2012
- March 2012
- February 2012
- January 2012
- December 2011
- November 2011
- October 2011
- September 2011
- August 2011
- April 2011
- March 2011
- February 2011
- January 2011
- December 2010
- November 2010
- October 2010
- September 2010
- August 2010
- July 2010
- June 2010
Meta
Category Archives: Uncategorized
Remembrances of Tech Revolutions Past: My Years at General Motors
You may have seen the Bill Gates comment on My Years With General Motors: ” . . . probably the best book to read if you want to read only one book about business.” Well, what if you want to … Continue reading
Chat-GPT is stumped by a logic puzzle
>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
Posted in Uncategorized
Leave a comment
Controlling a Robot Arm over the Internet
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
DC Motor Control: H-Bridge and L293D chip
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
Nooli Dots
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
Timesense, a science fiction novella
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
Posted in Uncategorized
2 Comments
The Ten Million Ton Space Elevator
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
Posted in space technology, Uncategorized
Tagged space colonization, space elevator, ten million ton, zylon
Leave a comment
Graph of IQ vs. US Household Income Percentiles
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
Posted in Uncategorized
Leave a comment
Multi-mode pen light: ATTiny85 with RGB LED
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
Beyond the Blink: RGB LED multiple lighting effects with arduino, push button, and potentiometer
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
