For many DIY electronics projects, precise voltage adjustments are essential. Whether you're fine-tuning sensor inputs, calibrating circuits, or adjusting reference voltages, a high-precision trimmer potentiometer can make all the difference. In this project, we will build a DIY adjustable voltage divider using the 3386F-1-502LF, a high-precision 5kΩ trimmer potentiometer, to achieve reliable and stable voltage control.
The 3386F-1-502LF is a single-turn, through-hole trimmer potentiometer designed for applications requiring fine voltage adjustments. Key features include:
● Resistance Value: 5kΩ, suitable for a wide range of applications
● Compact Design: Fits easily into DIY circuit boards and breadboards
● Single-Turn Adjustment: Allows precise voltage tuning
● Long Lifespan: Reliable performance over extended usage
This project involves designing an adjustable voltage divider to fine-tune voltage levels for various applications. The circuit can be used to set reference voltages for sensors, operational amplifiers, or other analog circuits. By using the 3386F-1-502LF, we ensure precise control over the output voltage.
● 3386F-1-502LF Trimmer Potentiometer (x1)
● Resistors (Fixed Values, Various Ratings) (for setting min/max voltage limits)
● Capacitors (Optional, for Smoothing Voltage)
● Multimeter (for measuring voltage output)
● Power Supply (5V, 9V, or 12V, depending on your application)
● Connecting Wires
● PCB or Breadboard
A voltage divider consists of two resistors in series, dividing the input voltage into a smaller, adjustable output. By replacing one resistor with the 3386F-1-502LF, we gain precise control over the output voltage.
● Connect the input voltage (e.g., 12V) to one end of the trimmer potentiometer.
● Connect the other end to ground.
● The adjustable wiper (middle pin) serves as the output voltage.
● Optionally, add a fixed resistor in series to limit the adjustment range.
● Use a multimeter to measure the output voltage while adjusting the trimmer.
● If necessary, adjust the fixed resistor values to set upper and lower voltage limits.
● For sensitive circuits, add capacitors across the output for voltage stability.
1. Set an initial voltage using the trimmer potentiometer.
2. Measure and verify the output voltage using a multimeter.
3. Test the stability by observing if the voltage remains steady over time.
4. Integrate into your circuit and check for proper functionality.
This adjustable voltage divider can be used in:
● Sensor Calibration (setting reference voltages for analog sensors)
● Operational Amplifier Circuits (adjusting biasing voltages)
● DIY Audio Electronics (fine-tuning signal levels)
● Battery Management Systems (monitoring voltage levels)
Using the 3386F-1-502LF trimmer potentiometer in an adjustable voltage divider circuit allows precise control over voltage levels in various electronics projects. Whether you're tuning a sensor circuit or setting reference voltages, this project provides a simple yet effective solution for precision adjustments.
With its ease of use, compact size, and fine-tuning capabilities, the 3386F-1-502LF is an essential component for any DIY electronics enthusiast looking to improve circuit performance and stability.
