![]() ![]() This system demonstrates the usage of LEDs (light emitting diodes) as light source and its variable intensity control, according to the requirement. This system is built to overcome the present day, drawback of HID lamps. Its intensity cannot be controlled according to the requirement, so there is a need to switch to an alternative method of lighting system, i.e., by using LEDs. LDR Based Power Saver for Intensity Controlled Street Light In the present system, mostly the lightning-up of highways is done through High Intensity Discharge lamps (HID), whose energy consumption is high and there is no specialized mechanism to turn on the Highway light in the evening and switch off in the morning. If the power supply is interrupted, the EEPROM retains that information to operate the motor at the same speed as before while the power supply was available. The microcontroller receives the percentage of duty cycles stored in the EEPROM from inbuilt switch commands and delivers the desired output to switch the driver IC in order to control the speed of the DC motor. The speed control of the DC motor is achieved by varying the duty cycles (PWM Pulses) from the microcontroller as per the program. Therefore, the motor remains in an operational state or restarted to operate at the same speed as before by using stored data from an EEPROM. The main intention of this project is to operate a BLDC motor at a particular speed with a predefined voltage. If the input voltage applied is around 12v volts DC, then the output voltage is around 36 volts DC.ĮEPROM based Preset Speed Control of BLDC Motor It is designed to generate high-voltage pulses using a number of capacitors in parallel to charge during the on time, and then connected in series to develop a higher voltage during the off period. The main concept of this project is to develop a circuit that delivers the output approximately triple to that of the input voltage by Marx generator principle. The microcontroller release the respective duty cycles, then switch the MOSFET to illuminate the light with bright intensity Marx Generator Based High Voltage Using MOSFETs Here we can replace the LEDs in place of HID lamps which are connected to the processor with the help of the MOSFET. The proposed system using a Raspberry Pi board that is a new development board consist a processor to control it. In this project, MOSFET plays major role that is used to switch the lamps as per the requirement. This project is designed to control the lights automatically on the highways using microprocessor by variants of the clock pulses. For the MOSFET to operate as an analog switching device, that needs to be switched between its cutoff region where VGS =0 and saturation region where VGS =+v.Īuto Intensity Control of Street Lights using MOSFET If we are not giving the protection, then the MOSFET will be damaged. But when using MOSFET to switch either inductive load or capacitive load protection is required to contain the MOSFET applications. In the above circuit, it is a very simple circuit for switching a resistive load such as LEDs or lamp. If the resistive load of the lamp was to be replaced by an inductive load and connected to the relay or diode to protect the load. The positive voltage is applied at the gate of the MOSFET and the lamp is ON (VGS =+v) or at the zero voltage level the device turns off (VGS=0). In this circuit, using enhanced mode, a N-channel MOSFET is being used to switch the lamp for ON and OFF. ![]() For better understanding of this concept, here we have explained some projects. The applications of the MOSFET used in various electrical and electronic projects which are designed by using various electrical and electronic components. ![]()
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