PIR Sensor / Button for Plotclock / -Thermometer

myminifactory

Update #1: Minor bug fix in Calibration routine -> v1_1b Two enhancements have been added to the plot thermometer / clock found at http://www.thingiverse.com/thing:371248. This plot thermometer / clock is a unique item, but it has one major drawback - the pen can run out of ink or dry up quickly. These two enhancements address this issue by only plotting when necessary. A PIR sensor can be attached to the interface on the right side and will trigger the plot as long as someone is in the room. Alternatively, a button can be used which prints once every time the minute changes. One minute after nobody has been detected, the board is cleared to prevent ink from drying up. If neither the button nor PIR sensor is attached, the plot thermometer / clock operates normally and writes the current time or temperature every minute.