Proximity Sensors

4 prox dots proximity sensors being populated
Keith Rowell Design

I chose ProxDots for proximity detection for their size and weight. Here Bob Baxter is soldering the surface mount resistors and diodes and such. You can just about make out the 4 small circuit boards through the magnifying glass. These small sensors have a range of only about 4 - 6 inches. That's plenty for the Seattle "Walking Race".