Script: led_blink_with_voltmeter

• Download led_blink_with_voltmeter.hex: right-click the link and select Save link as…

led_blink_with_voltmeter.hex

• Open the python.microbit.org editor (python.microbit.org/v/2 matches the screencaptures).
• Click Load/Save and then drag the file you just downloaded and drop it on the gray box in the Load section.  
• Click Connect, then Flash, then Disconnect.

Tests

IMPORTANT: Your LED on voltage measurements might be considerably higher than the 2.65 V measurements shown below.  Basically, if you get anything in the 2.5 to 3.3 V range, assume it’s good.

• Go to cyberscope.parallax.com and click Connect.
• When the light turns on, check the CYBERscope voltmeter to see what voltage it applies to the circuit.  There may be a delay of a second or so between when the light turns on and when the measurement updates.

• Repeat the voltage measurement for the LED off state.