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Monthly Archives: March 2014
One of my favorite online magazines is +Plus. I was reading an article in +Plus today about how the Kepler satellite finds exoplanets and the article mentioned a simple formula for the probability of Kepler being able to detect a planet. I thought it would be interesting to discuss this formula here because it involves a simple formula that provides insight into cutting-edge science. Continue reading
Quote of the Day The sea is notoriously unforgiving, but it reserves its harshest penalties for those who venture beneath its surface. — U.S. Navy veteran A.J. Hill I have been watching the news coverage of the search for the … Continue reading
Quote of the Day Maybe not today…, maybe not tomorrow…, but someday… soon; … and for the rest of your life … – Rick Blaine, Casablanca. I was in my home town of Osseo this weekend to do some computer … Continue reading
Quote of the Day If there is one thing more than another for which I admire you, it is your original discovery of the Ten Commandments. — Thomas B. Reed to the youthful Theodore Roosevelt about his self-righteousness Introduction I … Continue reading
Quote of the Day We are what we repeatedly do. Excellence, then, is not an act, but a habit. – Aristotle Introduction I often build small electronics projects for use around my home. I recently put together a small sensor … Continue reading
Quote of the Day Do what you can, with what you have, where you are. — Theodore Roosevelt I was reading an article on autism and the article mentioned that autism is much more prevalent in boys than girls. This … Continue reading
I think this interrupted motion paper machine is really interesting. This is on my list for a project. If you want to see other projects like this, got Robert Ives’ web site.
Take a look at this digitally-created instrument and how it is being played.
I have a home project that requires me to design a Schmitt trigger circuit. There are numerous places on the web where you can find design equations for the Schmitt trigger constructed using an open-drain comparator. Unfortunately, these design equations do not model the output low-level saturation voltage of the comparator and in my application I need to be concerned about this voltage. My objective is to determine formulas for the resistors in the circuit as a function of the various threshold and output voltage levels I require. Continue reading