Dimmer Circuit
The dimmer circuit is a circuit that functions to adjust the light intensity of the Light Emitting Diode (LED). In addition to adjusting the intensity of the LED, this circuit can basically also be used to adjust the speed of a DC motor.
This circuit is built from the basic principle of a pulse width modulator or PWM (Pulse Width Modulation) compared to a latch circuit.
LED lights are electronic components that function to emit light. This lamp is widely used in electronics projects because of its small size and energy saving and uses less power.
A standard LED lamp only requires a current of 10mA to 20mA with a working voltage of 2 to 3 volts.
PWM CIrcuit
The PWM circuit is a circuit that functions to adjust the width of a signal in the form of a digital pulse. This circuit will set the time period of the High Signal and Low Signal without affecting the frequency of the signal.
This High and Low period will later be compared with the logic level of the Latch and then used to adjust the intensity of the LED light.
The Latch circuit itself is a circuit that functions to hold an input value until the value is reset or changed. This circuit uses a Multivibrator component. The logic level of Latch will be compared with the PWM then the result will determine the intensity of the LED light.
Material :
- IC 555 (1)
- IC 4013 (5)
- IC AND Gate 7408 (1)
- IC 4028 (1)
- IC 7485 (1)
- Diode 4148 (1)
- Transistor NPN BC 337 (1)
- Resistor 4K7 (2)
- Resistor 10K (3)
- Resistor 1K (2)
- Kapasitor 100n (1)
- Push button Switch (2)
- LED 5mm (4)
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