Lesson 1: Measuring DC Voltage

Measuring Voltage Across the Entire Circuit

Now that you understand each component, let’s make your first voltage measurement using a multimeter.

1. Turn on the master switch by sliding it to the right.

2. Set your multimeter to DC Volts (V⎓).

3. Place the red meter lead on the B+ test point — this is your power source.

4. Place the black meter lead on the Ground (GND) test point — this is your return path.

You should see a voltage reading close to the battery or supply voltage.
If you’re using a coin cell, this will be around 3 volts.