Monthly Archives: July 2012

Non-UN Participants in the Olympics

Posted on 31-July-2012 by mathscinotes

I was listening to the radio today and I heard a reporter say that 205 countries were participating in the Olympics. I checked and that number is correct. That seemed like a lot of countries, so I went to the … Continue reading →

Posted in Personal | 4 Comments

Volcano Math

Posted on 24-July-2012 by mathscinotes

I was listening to Planetary Radio the other night and they had an interesting interview with Rosaly Lopes, a researcher at the Jet Propulsion Laboratory who has discovered more volcanoes than anyone else. Her discoveries were of volcanoes on other … Continue reading →

Posted in General Science, software | Tagged , | 4 Comments

Lighting My House Number and Designing with Phototransistors

Posted on 11-July-2012 by mathscinotes

Introduction I have had several people say that my house number is difficult to read at night. The number consists of four digits mounted on a structural column that holds up a section of my roof. In response to these … Continue reading →

Posted in Construction, Electronics | Tagged | 5 Comments

Handling "Hot" Electronics Requires Gloves

Posted on 9-July-2012 by mathscinotes

I have had a number of equipment installers contact me this summer and express concerns about the temperature of the outdoor electronics that they are handling. In some cases, the electronics is too hot to hold. In every case, the … Continue reading →

Posted in Electronics | Tagged , | 2 Comments