0.28″ 5 Wires Red Led Digital Dual DC 100V 100A Voltmeter Ammeter Without Shunt

(8 customer reviews)

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SKU: 11588
  1. Operating Voltage: 5V DC
  2. Current Consumption: <60mA
  3. Testing Voltage: 0-100V
  4. Testing Current: 1-100A
  5. Easy to read even in dim light


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Category: Digital Voltage, Current and Frequency Meter, Electronics Components on Sale
Tags: LED Display, Voltmeter, Ammeter, Shunt Resistor

This is 0.28″ 5 Wires Red Led Digital Dual DC 100V 100A Ammeter  Voltmeter. This meter will measure up to 100 VDC with a 0.1-volt resolution.

One thing to note is, this meter has 2 wiring harnesses. One harness is to provide power for the meters, that’s the 2 poles with a RED and a BLACK lead. Small size, portable, the magnitudes of voltage and current are displayed on the same screen at the same time.

This can be supplied anywhere from 6 volts DC up to 30 VDC. This is a separate power supply that is isolated from the source, it is possible to use the same supply but it seems to affect the amp meter reading. The 3 wire harness is used for a ground that connects directly to the battery or supply ground of the load.

Note: There are two different wiring variants (i.e. yellow wire and Green wire ) with the same working functionality is available which will be shipped randomly. Use the following guidelines according to your version.

CASE 1: Onboard Wiring Instructions for “Yellow” Wire connection

1. Thin Red Wire (VCC): positive pole of power supply input (4.5-30V)
(Note: if the measuring signal is less than 30V and the power is adequate, can be the power supply of module)

2. Thin Black Wire (GND): the negative pole of power supply input (4.5-30V, common ground with measuring signal)

3. Green Wire (VIN): positive pole of measuring signal input (0-100V)

4. Thick Red Wire (I+): positive pole of current input (series connect on the power supply cathode)

5. Thick Black Wire (I-): the negative pole of current input (series connect on the power supply cathode)

Connection Diagram:Digital Dual DC 100V 100A Voltmeter Ammeter

Note: If the input voltage is more than 5V, then, please use a buck converter.

Note: This Product Does Not include a shunt.

CASE 2: Onboard Wiring Instructions for “Green” Wire connection

(The current range of 10A requires the external shunt connection process)

1. Connect the lines which are not connected well, and do not touch other places.

2. The shunt is connected to the negative pole of the measuring system (the shunt itself does not distinguish the direction, and the connection is fixed to the two large screw holes in the distributor.

3. According to the current direction, the green line (+) and the black line (-) of the three lines are respectively screwed on the two small screws of the shunt.

4. Connect the red line of the three lines to the positive pole of the measuring system.

5. The power supply line in the two lines is connected to the appropriate power supply (and the voltage between the black lines in the three lines. It is suggested to be connected to the 12V, at the same time, the electric power black lines in the two lines are wrapped with insulating tape, so do not encounter other places, so as not to cause a short circuit).

6. The above 1-5 steps are suitable for the use of common ground; for independent power supply occasions, the red and black lines of power supply in two lines are respectively connected to both sides of the positive and negative poles of the power supply (the power supply voltage <28V, suggested to be about 12V).

Connection Diagrams:

circuit diagram

Features :

  1. It measures up to 100V and 100A DC.
  2. Very handy and small in size.
  3. It requires a power supply of 5V.
  4. 100% Brand new and high quality.

Package Includes:

1 x Dual LED Panel Ampere Voltage Meter.

Note: The package does not include Shunt Resistance for 100A. It is a display only and not a measuring instrument.





Operating Voltage (VDC)


Current Consumption (mA)


Test Voltage (V)

0 to 100

Test Current (A)

1 to 100

Refresh Speed (ms)

500 (one time)

Operating Temperature (°C)

-10 to 60

Height (mm):


Length (mm):


Width (mm):


Shunt Resistor Dimensions (mm)

120x25x20 (LxWxH)

Weight (g):


Shipping Weight 0.018 kg
Shipping Dimensions 7 × 4 × 3 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

Based on 8 reviews

4.4 overall

Add a review

  1. krishnarajbhat (verified owner)

    Works fine…worth of money.
    if current is below 1A display turns OFF to save power & comes ON above 1A, I didn’t need this function, but there is no option to do so.
    accuracy needs to be checked over higher current values.


  2. Dhananjay (verified owner)

    GOOD ONE !


  3. Hassan Mallick

    good product

    Hassan Mallick

  4. Jagdish Saxena (verified owner)

    good product

    Jagdish Saxena

  5. riju (verified owner)

    good one..simple connections


  6. s kumar (verified owner)

    Proper chaines product

    s kumar

  7. ss19972997



  8. VIMAL PANDYA (verified owner)



Questions and answers of the customers

    What value shunt resistance do i need to connect i... Read more
  1. 1 vote
    Q What value shunt resistance do i need to connect in order to measure the current answer now
    Asked by dco.savio on August 23, 2020 4:29 am
    Answered by the admin

    kindly use 5V/100A =0.05 ohm resistance shunt f... Read more

    A At first, check if there is any in-built shunt... ... Read more
Only registered users are eligible to enter questions
Country Of Origin: China

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