120K Ohm Resistor Kit (50 Pack)

Description

50PCS Resistor 120K ohm 120000 ohm 1/4w 1/4 w 5%

Tutorial: How to use Resistor 120K ohm

The 120k ohm resistor is a fundamental component for electronic projects that require current limiting or voltage level shifting. Ideal for beginners and intermediate makers.

What you need

• Arduino Uno
• Digital Multimeter

Steps

1. Check the datasheet of the 120K ohm resistor for its color code or written value to confirm it corresponds to 120k ohm.
2. Connect one end of the resistor to the digital output pin of the Arduino Uno and the other end to ground (GND).
3. Open the Arduino IDE software, create a new sketch and write the script to turn on and off the port connected to the resistor.
4. Verify with a multimeter that the voltage measured on the Arduino pin corresponds to the expected value when the port is active.
5. If necessary, repeat the previous steps with other pins to test different configurations.

Example code

void setup() {
  pinMode(13, OUTPUT);
}

void loop() {
  digitalWrite(13, HIGH);   
  delay(1000);              
  digitalWrite(13, LOW);    
  delay(1000);               
}

Mini project

Create a simple timer with the Arduino Uno and the 120K ohm resistor. Connect a 5V LED lamp to pin 13 of the Arduino through the resistor. Use the sketch above to turn the LED on and off every second.

Common mistakes

• Using a resistor with a value that is too low, which could damage the microcontroller’s output.
• Failing to verify the value of the resistor before use.
• Ignoring the power dissipation specifications of the resistor (1/4w in this case).
• Using it in a circuit where it is not necessary or appropriate.

Recommended accessories

• Arduino Uno R3
• Variable resistor set
• Basic Arduino kit

Frequently asked questions

How can I verify the value of the resistor?
Use a multimeter in ohmmeter mode.

Why does the resistor have a specific power dissipation specification (1/4w)?
The resistor can handle up to 250 mW of power before it needs to be cooled or replaced to avoid damage.