Introduction: Tutorial for Mini Digital Voltmeter

Picture of Tutorial for Mini Digital Voltmeter

Description

Put a voltage meter anywhere with this very handy display. These are often used by RC hobbyists for keeping track of batteries but we thought it would be great on a breadboard or enclosure. This is the 2-wire version of the volt meter, two wires are used to power it and measure at the same time.


Specification

  • Operating Voltage : 4.5-30V

  • DCSize: 0.56 Inch

  • Dimension: 48mm*29mm*18mm

Step 1: Material Preparation

Picture of Material Preparation

To do this tutorial, you will need to prepare as following below :

  • MS-4.5-3.0 Digital Voltmeter
  • Multimeter / Voltmeter
  • DC Jack (Female)
  • Battery or Adapter (12V, 7.4V, 5V)

Step 2: Pin Connection

Picture of Pin Connection

Connect the red wire of digital voltmeter to + of DC jack and black wire of digital voltmeter to - of DC jack. Then, connect to your battery / power adapter to measure voltage to see if this mini digital voltmeter can work just fine.

Step 3: Measure the Voltage

Picture of Measure the Voltage

Now, take your multimeter. Turn it on and shift the pointer to DC Voltage. Place the red probe of your multimeter to DC jack's +ve and black probe of multimeter to DC jack's -ve.

Step 4: Result (5V)

Picture of Result (5V)

As you can see on the picture above, this is the result when both mini digital voltmeter and digital multimeter measure the voltage of 5V power adapter.

Step 5: Result (7.4V)

Picture of Result (7.4V)

As you can see on the picture above, this is the result when both mini digital voltmeter and digital multimeter measure the voltage of 7.4V Li-ion battery.

Step 6: Result (10.7V)

Picture of Result (10.7V)

As you can see on the picture above, this is the result when both mini digital voltmeter and digital multimeter measure the voltage of 12V Li-ion battery.

NOTE : this battery is not fully charge, therefore, the reading is only 10.7V.

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