Getting Started
No account is required to start. Sign up only when you want to save your work to the cloud.
Open the simulator
Go to sim.devoltapp.com. The editor loads immediately in your browser. No download, no install.
Your first circuit
We’ll build an LED circuit with a 5 V bench supply, a current-limiting resistor, and an LED.
- Open the component palette: click the Components tab on the left edge of the editor.
- Place a Bench PSU: find it under Sources, put it beside the breadboard, and set
voltageto 5 V in the Inspector. - Place a Resistor: find it under Passive. A 330 Ω resistor gives a comfortable current for a standard red LED on 5 V.
- Place an LED: find it under Output. Red, Green, Blue, White, Yellow, and Amber LEDs are available.
- Wire the components: click any pin dot, drag to another pin, and release. The simulator draws the wire automatically.
- Connect the + pin of the supply to one leg of the resistor.
- Connect the other resistor leg to the anode (+) of the LED.
- Connect the LED cathode (−) back to the supply − pin. The first source return is the circuit’s Ground reference, and both terminals need a complete loop.
- Run the simulation: click the run button in the toolbar. The LED glows and the live current value appears in the Inspector panel.
Inspector panel
Click any component to see available voltages, currents, parameters, exact model identity, and Included / Not included on the right-hand Inspector. Missing or non-converged telemetry is shown as unavailable rather than as a false zero. You can edit parameters such as resistance or capacitance while the simulation runs and see the circuit respond.
Keyboard shortcuts
The editor has remappable shortcuts. These defaults are useful when you are starting out:
| Shortcut | Action |
|---|---|
Cmd/Ctrl + S | Save project to cloud |
Cmd/Ctrl + Z | Undo |
Cmd/Ctrl + Shift + Z | Redo |
Cmd/Ctrl + A | Select all |
Cmd/Ctrl + D | Duplicate selection |
Delete or Backspace | Delete selected item |
Escape | Cancel / clear |
A | Toggle current arrows |
W | Wire-only drag |
Space | Add a bend while drawing a wire |
Scroll | Zoom in / out |
Open Account & Settings for the full configurable shortcut list. Run, pause, reset, and simulation speed are controlled from the toolbar.
Saving your work
Click Sign in in the header, enter your email, and follow the magic link. Once signed in, Cmd/Ctrl + S saves the circuit to your cloud project list at /dashboard. Projects sync across devices automatically.