How to Use h: Examples, Pinouts, and Specs

A resistor is a fundamental electronic component widely used in various applications to limit or regulate the flow of electric current. The VHB series resistors from manufacturer HH are designed to offer stability and precision in controlling current within electronic circuits. Common applications include setting bias currents, adjusting signal levels, and dividing voltages in both digital and analog circuits.

• Type: Fixed Resistor
• Technology: Thick Film / Metal Film / Wirewound (depending on specific model)
• Resistance Range: 1 ohm to 10 megaohms (Ω)
• Tolerance: ±1%, ±5%, ±10% (model dependent)
• Temperature Coefficient: Varies with material and construction
• Operating Temperature Range: -55°C to +155°C (model dependent)

• Rated Power: 0.125W to 1W (depending on physical size)
• Maximum Working Voltage: Varies with resistance value and size
• Overload Voltage: 2x Rated Voltage or Maximum Working Voltage (whichever is lower)

• Sizes Available: 0201, 0402, 0603, 0805, 1206, 1210, 2010, 2512 (Imperial code)
• Termination: Nickel Barrier with 100% Matte Tin Plate (lead-free)

Since resistors are two-terminal components, they do not have a complex pin configuration. The two terminals are identical and interchangeable, known as 'A' and 'B'.

1. Determine the Resistance Value: Calculate the required resistance for your specific application using Ohm's Law or other relevant design principles.
2. Select the Resistor: Choose a VHB series resistor with the appropriate resistance value and power rating.
3. Orientation: Connect the resistor in the circuit. Orientation does not matter as resistors are non-polarized components.
4. Soldering: Use proper soldering techniques to avoid damaging the component with excessive heat.

• Ensure the power rating of the resistor is suitable for the circuit to prevent overheating.
• Consider the tolerance and temperature coefficient for precision applications.
• Use resistors with a higher maximum working voltage than the expected voltage in the circuit for safety.

• Excessive Heat: If the resistor is too hot, it may be dissipating more power than its rated capacity. Check the power calculations and replace with a resistor of a higher power rating if necessary.
• Open Circuit: A lack of continuity could indicate a damaged resistor. Test with a multimeter and replace if defective.
• Unexpected Voltage Drops: If the voltage drop across the resistor is not as calculated, verify that the actual resistance value matches the specified value.

Q: Can I replace a VHB series resistor with a different series? A: Yes, as long as the replacement has the same resistance value, tolerance, and adequate power rating.

Q: Does the direction of current flow matter through a resistor? A: No, resistors are non-polarized and can be connected in any direction.

Q: How do I know if a resistor is failing? A: Signs of a failing resistor include discoloration, cracking, and changes in resistance value. It may also fail open, resulting in no continuity.

Here's a simple example of how to connect a VHB series resistor to an Arduino UNO for a basic LED circuit:

// Define the LED and resistor pins
const int ledPin = 13; // LED connected to digital pin 13
const int resistorPin = A0; // Resistor connected to analog pin A0

void setup() {
  pinMode(ledPin, OUTPUT); // Set the LED pin as an output
}

void loop() {
  digitalWrite(ledPin, HIGH); // Turn the LED on
  delay(1000); // Wait for a second
  digitalWrite(ledPin, LOW); // Turn the LED off
  delay(1000); // Wait for a second
}

Note: In this example, the resistor would be connected in series with the LED to limit the current. The actual pin used for the resistor is arbitrary since it's not directly controlled by the Arduino but is part of the LED circuit.

Remember to ensure that the resistor value is appropriate for the LED to prevent it from burning out. Typically, a 220Ω to 330Ω resistor is used for a standard 5V LED circuit.