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

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

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

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)

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)

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)

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.