The amount of light emitted by na LED is given by the intensity of the current flowing across it. You can control this current and thus the account of light using a potentiometer. In the simulation the key A is used to change the potentiometer’s resistance. In the simulation the MultiSIM BLUE can’t change the amount of light. So exists a point of the control where the LED passes from the of to the on state and vice versa.
The circuit.
The simulation
- Use key A to vary the resistance of P1. Key A increases the resistance and key A + Upper Key decreases the resistance.
To download the simulation files and Netlist - click here (msb0053.zip)
