Voltmeter
A measurement instrument that displays the voltage difference between its two terminals. Must be placed in parallel across the component or nodes you want to measure — it does not interrupt the current path.
Properties
| Property | Description | Default | Range |
|---|---|---|---|
| Internal resistance | Shunt resistance of the meter (MΩ) | 10 MΩ | 1 MΩ – 1 GΩ |
| Range | Maximum voltage that can be displayed (V) | Auto | 1 V / 10 V / 100 V / 1 000 V / Auto |
| Display precision | Number of decimal places shown on the readout | 3 | 1 – 6 |
Simulation behavior
During simulation the voltmeter displays the instantaneous voltage across its terminals in real time. The sign follows the terminal polarity — positive when the + terminal is at higher potential.
The very high internal resistance (default 10 MΩ) means the voltmeter draws negligible current and does not disturb the circuit. Reducing it to a low value lets you observe the loading effect of a real-world meter.
In Auto range mode the unit prefix scales (mV, V, kV) to keep the displayed number readable.
Tips
- Connect both terminals across the component you want to measure — one terminal to each side. Connecting only one terminal will read 0 V.
- Use a voltmeter across a current-limiting resistor and apply Ohm's law (I = V / R) as an alternative to adding a series ammeter.
- Place voltmeters at multiple nodes simultaneously to visualize how voltage distributes across a voltage divider without slowing the simulation.