Objective
The purpose of this experiment is to understand the application and behavior of surface mount resistors in a circuit. We will explore their usage in a simple circuit and compare their performance with through-hole resistors.
Components Required
- 1 x Surface Mount Resistor (1kΩ, 0603 package)
- 1 x Through-Hole Resistor (1kΩ)
- 1 x DC Power Supply (5V)
- 1 x Multimeter
- 1 x Soldering Iron
- 1 x Breadboard (for through-hole) or SMD PCB
- Connecting Wires
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Theory
Surface mount resistors are widely used in modern electronics due to their small size, which allows for higher component density and better performance at high frequencies. They are soldered directly onto the PCB, eliminating the need for leads that through-hole components require.
Circuit Diagram
Experimental Setup
1. If using a PCB, solder the surface mount resistor (0603) onto the designated pads. If using a breadboard, prepare an SMD adapter.
2. For the through-hole resistor, insert it into the breadboard.
3. Connect the resistors in series with the power supply and the multimeter to measure voltage across each resistor.
Procedure
- Connect the DC power supply to the circuit, ensuring it is set to 5V.
- Measure the voltage drop across the surface mount resistor using the multimeter.
- Record the voltage reading.
- Replace the surface mount resistor with the through-hole resistor, maintaining the same connections.
- Measure the voltage drop across the through-hole resistor using the multimeter.
- Record the voltage reading and compare it to the previous measurement.
- Discuss the ease of soldering and positioning the resistors in your circuit.
Results and Observations
Record the voltage drops across both types of resistors. Discuss any differences in performance, thermal properties, or ease of use between the surface mount and through-hole resistors.
Conclusion
This experiment demonstrates the application of surface mount resistors in electronic circuits. By comparing them with through-hole resistors, we observe the benefits of size, performance, and ease of integration into modern PCB designs. Surface mount resistors are essential for compact, efficient circuit designs.
