Circuit Playground’s version 1.6.3 update adds a new feature and irons out a few more wrinkles in the app’s attire, namely:

LED Resistor Calculator now provides power rating
In addition to recommended resistance, this calculator now outputs the minimum resistor wattage.
Bugfix for Ohms Law Calculator sometimes truncating current value
Smaller current values will now be presented correctly
Bugfix for LED Resistor Calculator value saving on iPhone
iPhone users may have noticed this calc not saving values – all fixed now!
Please take a moment to update and then resume being awesome.

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Resister power rating! Awesome! I’m very happy to see that added.
Keep up the great work, everyone at Adafruit.
Comment by Derek Lewis — December 13, 2012 @ 4:00 pm