Linear Light Dimmer by Power Mosfet

Changing the value of R2 alters the intensity of the lamp in this circuit, demonstrating the utility of a MOSFET as a variable resistor. An N-Channel Power MOSFET, designated as Q1, is utilized in the circuit. The specific part number should correspond to the load or lamp size. The lamp operates within a voltage range of 4 to 6 volts, using a power supply voltage of 6V.

The described circuit utilizes an N-Channel Power MOSFET (Q1) as a variable resistor to control the intensity of a lamp. The resistor R2 plays a crucial role in this setup; by varying its resistance, the current flowing through the lamp can be adjusted, thereby changing its brightness. This is a practical demonstration of how MOSFETs can function effectively in applications requiring variable resistance.

The selection of the MOSFET is critical and should be based on the load specifications. The power rating and the maximum current that the MOSFET can handle must exceed the requirements of the lamp to ensure reliable operation. For instance, if the lamp operates at a maximum of 6V and draws a specific current, the chosen MOSFET should have a threshold voltage lower than 6V and be capable of handling the corresponding power dissipation.

In this application, the power supply is set at 6V, which is suitable for operating the lamp within its specified voltage range of 4 to 6 volts. The circuit may include additional components, such as a gate resistor to limit the gate current and a pull-down resistor to ensure that the MOSFET remains off when not driven by the control signal.

Overall, this circuit exemplifies the versatility of MOSFETs in controlling load devices like lamps, allowing for efficient brightness adjustment while maintaining stable operation across varying load conditions.When change the value of R2 Intensity of Lamp change to this circuit shows the usability of Mosfet be Variable Resistor. By Q1 use N-Channel Power Mosfet. but what is the number all right follow the size of Load or Lamp there. When change the value of R2 Intensity of Lamp change to this circuit shows the usability of Mosfet be Variable Resistor.

By Q1 use N-Channel Power Mosfet. but what is the number all right follow the size of Load or Lamp there. The lamp use 4Volt to 6Volt sizes by use power supply Voltage 6V. 🔗 External reference