RPN-duino

[Chasfield]

I have been working at reducing the power consumption of the Teensy 3.2 based calculator. Setting the clock frequency to 24 MHz reduced it to 25 mA, with the display showing four lines of zeros and the device waiting for a key press. This had no subjectively observable impact on response or performance.

I decided to try something fancier and added Duff's Snooze library to the sketch (it was inclded with the Teensy extensions for the Arduino IDE). I replaced a 10 ms delay that was set in the main keyboard loop with 10 ms of sleep. This produced good results. The calculator now idles at 7.5 mA, which is a very modest burden for the 800 mA LiPo battery to carry.

Thank you, Duff!