Adding more batteries to a simple circuit will increase the electrical energy, which will make a bulb brighter. Electricity can flow through the components in a complete electrical circuit.
There are other types of power sources too, such as solar panels ... When designing a product that uses an electrical circuit you can draw a circuit diagram to record and share your plan with ...
The current draw is minimal ... Don’t forget you can measure currents, too, which can often provide insight into circuit operation. However, when using the .STEP command, you only get the ...