Archive for date: February 20, 2012

50th anniversary of Glenn’s orbit aboard Friendship 7

February 20, 2012 | Space | By: Mark VandeWettering

50 years ago today, American astronaut John Glenn completed three orbits of the earth aboard Friendship 7. Glenn would later become Senator, and would return to space aboard the Space Shuttle Discovery as part of the STS-95 crew, becoming the oldest person to fly into space. These three orbits started fifty years of an American […]

Examining the output of a simple remote-keyless-entry transmitter…

February 20, 2012 | Amateur Radio, Arduino, electronics | By: Mark VandeWettering

Yesterday I was looking (sadly unsuccessfully) for some BPW32 photodiodes that I know I have somewhere, when I ran across some of 434 Mhz transmitter modules from Sparkfun (now a retired part) that I had never used. These little $4 transmitters are commonly used for remote-keyless access or similar applications. They have just four pins: […]