Circuit Playground App Update – Magnetic Pole Detection
Circuit Playground for iOS has been updated with a new feature – magnetic pole detection! You can now determine the polarity of small magnets with your iPhone or iPad:
Warning: Strong magnets can permanently damage your device. To avoid damage, do not place rare earth magnets less than 8cm away from your device.
To detect a magnet’s pole, hold the magnet stationary about 30cm away from your device’s sensor position (as shown in the image). Slowly bring your device closer until a North or South polarity is displayed.