The Led dimmer circuit you see in the diagram works like a DC dimmer, the brightness of a number of led groups can be increased or decreased. The supply of the circuit is + 12V and the led groups...Electronics Projects, 555 Led Dimmer Circuit IRFZ44 "555 timer circuits, power electronic projects, " Date 2019/12/08
The Led dimmer circuit you see in the diagram works like a DC dimmer, the brightness of a number of led groups can be increased or decreased. The supply of the circuit is + 12V and the led groups are grouped in series and parallel so as not to exceed the circuit supply. The circuit power can be supplied from a battery or directly. SW2 is the on / off switch of the circuit. SW1 switch is the switch that keeps the LEDs in continuous transmission.
Here, the task of diode D112 (1n4148) is to disconnect the signal output of the 555 timer from the circuit supply as the 555 timer will operate when the Sw1 switch is off. The function of the diode D111 (1n4148) is to protect the output of the timer. U1 555 timer is the main controller that makes the circuit work as a dimmer.
The materials RV1, R1, R2, C1 and C2 are indispensable for a timer to function properly. When the position of the potentiometer RV1 is changed, the brightness of the leds will change as the frequency at the output of the timer changes.
Led Dimmer Circuit Schematic Diagram
The output signal of the 555 Timer will drive the N-channel power mosfet through the R25 resistor. Resistance to R26 is the resistance that leads to power cut. In order to protect the series connected led groups, R3 ön R24 pre-resistors are connected to the anode terminals and drawn to + 12V, the cotode ends of the led groups are connected to each other and connected to the drain end of the power mosfet.
The source end of the IRFZ44 Mosfet is connected to the chassis. Depending on the temperature, IRFZ44 must be connected to the Mosfet cooler.