NASA engineer Bob Wilson devised a technological solution for a bureaucratic problem: convince building maintenance that his office was frigid in the morning. By the time anyone responded to a call, the heat was on. So he programmed a TI MSP430-F2013 microcontroller to record the temperature continuously over several days. The size of a quarter and powered by a 3V lithium cell, it records converted, filtered, RL-encoded data from its built-in temperature transducer into Flash memory, to be read back later via a USB interface. The maintenance department was convinced.
|"Quarter-sized Temperature controller"|
||Allied Part #|
|1||32.768 kHz watch crystal or equivalent||614-0186|
|1||20 mm. coin cell, 3-3.5V or equivalent||774-0113|
|1||Half-inch, clear, shrink wrap or equivalent. Only 0.5 x 0.5 inch per cell, 100+ cells||708-9214|
|1||Epoxy putty. For ~50-100 cells||796-9831|
Additional parts required: Ez430-F2013 development kit with MSP430-F2013 microcontroller, available at Texas Instruments.
Download the build instructions (Word Document)