0-100V 10A DC Voltmeter Ammeter Module ZN-DC-PL-V1.4

ZN-DC-PL-V1.4 Dual Display LED Volt Amp Meter Module

The ZN-DC-PL-V1.4 is an essential instrument for electronics hobbyists, engineers, and makers across Bangladesh. Available at Biggan Project (বিজ্ঞান প্রজেক্ট), this compact dual-display LED digital DC volt-ammeter module provides real-time, simultaneous monitoring of both DC voltage and current. Whether you are building custom power supplies, testing robotics circuits, or monitoring battery banks in your lab, this device delivers reliable precision. Designed with a clear 0.28-inch dual-color LED screen—featuring red for voltage and blue for current—it allows users to instantly read operating parameters at a glance. Backed by local availability and fast delivery across BD, it is a trusted choice for educational institutions, student science fairs, and professional prototyping benches alike.

Features

• Simultaneous dual-screen display showing both DC voltage and DC current in real-time.
• Integrated current shunt resistor designed for direct measurement up to 10A without external hardware.
• High-visibility 0.28-inch LED digits featuring distinct red and blue color separation.
• Flexible power supply options supporting either shared voltage measurement or an isolated power source.
• Built-in calibration potentiometers located on the rear board for fine-tuning voltage and current accuracy.
• Compact panel-mount design that fits seamlessly into custom project enclosures and instrument chassis.

Applications / Use Cases

• DIY adjustable bench power supplies and linear voltage regulator modules.
• Solar power generation setups and miniature photovoltaic experiment kits.
• Battery charging and discharging state-of-health monitors for lithium and lead-acid cells.
• Robotics chassis power distribution tracking to prevent overcurrent draw on motor drivers.
• Educational physics and electronics laboratory demonstrations across BD schools and universities.

User Guide / How to Use

• Connect the thin red wire to the positive terminal of your auxiliary power supply or shared source (DC 4.5V to 30V).
• Connect the thin black wire to the system ground (note that it is internally common with the thick black wire).
• Connect the thin yellow or blue voltage sense wire to the test point where you want to measure DC voltage (0V to 100V).
• Insert the thick black wire into the negative return line leading back to the power source.
• Insert the thick red wire into the negative input coming directly from your electrical load.
• Power on your circuit and use the rear calibration trimmers with a precision multimeter if fine adjustment is required.

Frequently Asked Questions (FAQs)

• Q: Can this module measure AC voltage or AC current?
  A: No, the ZN-DC-PL-V1.4 is strictly designed for direct current (DC) systems only. Do not connect it to AC mains power.
• Q: What happens if I measure voltage above 30V using the power wires?
  A: The meter's internal electronics require an isolated power supply (below 30V) if you are measuring test voltages ranging from 30V up to 100V.
• Q: Why does the ammeter display zero current when the power is on?
  A: Ensure that the thick current wires are wired in series with the low-side negative ground path of your load, rather than across the positive supply.

Challenges and Considerations

• Improper wiring of the thick current wires directly across power supply terminals will cause a direct short circuit and damage the module.
• Measuring currents near the 10A upper threshold for extended periods requires adequate wire gauge thickness to prevent resistive heating.
• High ambient electrical noise from inductive DC motors may require filtering capacitors across the power input pins.

Compatibility

• Fully compatible with 12V and 24V automotive and solar DC power systems.
• Compatible with standard breadboard power rails, bench power supply builds, and custom acrylic project boxes.
• Works seamlessly with Arduino, ESP32, and Raspberry Pi auxiliary power monitoring rigs.

Future Enhancement Options

• Integrate external high-current current transformers or external shunt resistors for measuring loads exceeding 10A.
• Add a 3D-printed snap-in bezel housing for secure flush mounting on custom metal or plastic control panels.
• Pair with microcontrollers via optocoupler isolation to log digital telemetry data alongside visual meter readings.

Benefits

• Provides instant visual confirmation of system performance, protecting valuable electronic components from voltage spikes.
• Eliminates the clutter of using two separate standalone analog or digital meters.
• Offers exceptional value and reliability for student projects, hobbyist workstations, and commercial prototypes.

Conclusion

The ZN-DC-PL-V1.4 Dual Display LED Volt Amp Meter Module stands out as an indispensable tool for anyone working with DC circuits. By combining dependable accuracy, intuitive dual-color visualization, and effortless integration, it empowers makers, technicians, and students to build safer, more efficient electronic systems.

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