7.5M Ohm Resistor Pack

Description

50PCS 7.5M ohm 7500000 ohm 1/4w 1/4 w 5%

Tutorial: How to use 7.5M ohm resistor

The 7.5M ohm (7,500,000 ohm) resistor is a fundamental component for electronic projects that require current limiting or voltage division on low current circuits. This tutorial is ideal for beginners and intermediate makers.

What you need

• Arduino Uno
• digital multimeter
• prototyping board

Steps

1. Check the resistance with the digital multimeter.
2. Connect one end of the resistor to pin 2 of the Arduino and the other end to ground (GND).
3. Write an Arduino sketch to measure the voltage on analog pin A0 connected to the resistor.
4. Upload the sketch to the microcontroller.
5. Monitor the circuit behavior through the serial monitor of Arduino IDE.

Example code

void setup() {
  Serial.begin(9600);
}

void loop() {
  int sensorValue = analogRead(A0);
  float voltage = sensorValue * (5.0 / 1023.0);
  Serial.println(voltage);
}

Mini project

Create a simple light sensor using the resistor as part of the voltage divider circuit with a photoresistor.

Common mistakes

• Use a resistance that is too high or too low for the circuit.
• Connect the resistance to the wrong pin on the Arduino.
• Do not properly verify the resistance before using it.

Recommended accessories

• Photocell 10k ohm
• RGB LED
• Resistors of various values

Frequently asked questions

What is the maximum power it can handle?
Check the datasheet, but generally for 1/4W resistors.

Can it be used with other microcontrollers besides Arduino Uno?
Yes, but make sure to adapt the connections and sketch based on the chosen microcontroller.