Why do we have to go through the microcontroller? Kan could we connect directly to the LEDs to regulate the flow of incoming? Correctly.
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LED light intensity regulator circuit with a potentiometer |
Once we learn to adjust the light intensity LED with a pushbutton, this time we will use a potentiometer. Advantages of using a potentiometer that is it easier because we only need one tool to make LED dimmer or brighter.
In the circuit above using a 50k ohm potentiometer type of trimmer. You can also try using a rotary potentiometer. Used in the image is a trimmer potentiometer which is smaller in size and can be plugged into the project board. Figure 3.4 is an example of one trimmer. Why do we have to go through the microcontroller? Will, we could connect directly to the LEDs to regulate the flow of incoming? Correctly.
Potentiometer type of trimmer |
The following steps to create the series:
- Connect the negative LED legs to GND with jumper
- Positive Foot LED is connected to one end of the leg (lower leg) potentiometer with a jumper
- Walking middle (foot on either side alone) connected to the other end of the foot (feet up) with a jumper
- Walking yan top connected to + 5v with resistor.
If you turn left or to the right, then the LED will light up more brightly, but the LED will never be extinguished. This is because the current into the LED is not possible to make the LED goes out. Why? Because the resistor selected is not appropriate.
The solution, we can menggukan PWM techniques as we discussed earlier. Just to set the PWM us using a potentiometer and not a pushbutton. Imagine?
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