Welcome to the Breadboard simulator. This program is designed to behave in much the same way as an actual solderless, electronic breadboard. The only difference is we’ve already completed the circuits for you.

By selecting the appropriate setting on the DMM, you will be able to test for voltage, resistance, and amperage at various points within the circuits.

• Select DC-Volts (V) to test for voltage.
• Test with the circuit energized and de-energized.
• In actual circuits there is voltage drop for wires, fuses, and switches. In this simulator there is no voltage drop across those components.
• Select Ohms (Ω) to test resistance.
  • Test component resistance with the circuit de-energized and the selected component removed from the circuit. Select the desired component from the drop down to isolate it.
  • Test total circuit resistance with the circuit de-energized and all components installed.
• Select Amperes (A) to measure current
  • Place the test leads at the ends of a connecting wire (the wire will be removed automatically, to reinforce that all current is routed through the meter). In real-world testing removing wires from the circuit is not necessary. 
  • Test with the circuit energized.

To perform a measurement, click and drag the leads from point to point. Or, click a lead to activate it, then click the letter of the terminal you want to test. While activated, the lead will snap to any contact point you select.

Note the differences with the circuits energized and de-energized.

When you have completed your measurements, click on “Questions” in the bottom menu to review your findings.

So let’s get started. From the scrollable list to the right, click the circuit you wish to test.

• Single Bulb Pushbutton Series Circuit
  
• Single Bulb Series Circuit
  
• Simple Series Circuit
  
• Simple Parallel Circuit
  
• Simple Series-Parallel Circuit
  
• Simple Relay Circuit
  
• Three Bulb Parallel Circuit
  

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