Ohmmeter Script
- Right-click ohmmeter_cyberscope.hex, and choose Save Link As...to download.
- Open it with the python.microbit.org/v/2 editor.
- Click Connect, then Flash.
- After the script is done loading into the micro:bit, click Disconnect.
Ohmmeter Tests
Individual resistors need to be removed from the circuit to be measured by an ohmmeter. Keep this in mind as you follow the instructions.
- Use the animation and the instructions below it to measure the 220 Ω resistor with your micro:bit ohmmeter.
- Optionally, view the full-size measure-resistance-220-from-led-circuit.mp4 clip to play and pause it between steps.
- Remove the 220 Ω resistor from the LED circuit.
- Plug the 220 Ω resistor’s leads into the rows with the positive and negative probes. Example: (d, 21) and (g, 21)
- Go to cyberscope.parallax.com, and click Connect.
- The CYBERscope should automatically start displaying resistance measurements. If it doesn't, try clicking the Device dropdown and selecting Ohmmeter.
- Resistance measurements should start displaying after a second or two.
- Verify that the measurement is somewhere in the 209 to 231 Ω range.
- Remove the 220 Ω resistor from the ohmmeter and reconnect it to the LED circuit.
TIP: When measuring individual resistors, you can also simply grab the ends of the resistors with the alligator clips.