

The wiring of this voltmeter is simple, only two wires need to be connected, the red wire is connected to the positive, and the black wire is connected to the negative. There is reverse connection protection in the meter, and the reverse connection does not burn.
This voltmeter does not require an external working power supply, it can work directly with the measured voltage, and the working voltage range is as wide as 4-30V
In order to achieve the best measurement accuracy, the voltmeter will automatically move the position of the decimal point according to the difference of the measured voltage. decimal point.
This voltmeter can be used to monitor the battery voltage of motorcycles, automobiles, etc., and grasp the battery status in time. It can also be used for other voltage measurement purposes. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
Consider the 1V voltage drop at the voltmeter itself, as we observed it at our labs while testing this Voltmeter.
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General Specification | |
Product Type | DC Voltmeter |
Operating Voltage (VDC) | 4-30 VDC |
Average Current Consumption (mA) | Less than 20mA, generally 5-15mA |
Full Refresh Time (s) | Approx 300mS/time. |
Display color | Red |
Accuracy | 0.1 V |
Working Voltage | 4-30V |
Product Color | black |
Weight (g) | 20g |
Shipment Weight | 0.02 kg |
Shipment Dimensions | 10 × 6 × 1 cm |
Please allow 5% measuring deviation due to manual measurement.
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1 x DC 4-30V Voltmeter LED Display Panel
The latest price of DC 4-30V Voltmeter LED Display Panel in Bangladesh is BDT 190 You can buy the DC 4-30V Voltmeter LED Display Panel at best price from our RoboticsBD or visit RoboticsBD Office.
Please note that the product information provided on our website may not be entirely accurate as it is collected from various sources on the web. While we strive to provide the most up-to-date information possible, we cannot guarantee its accuracy. We recommend that you always read the product labels, warnings, and directions before using any product. |
Product Images are shown for illustrative purposes only and may differ from the actual product. |
Reference: RBD-0575
Main color: Yellow Measure range: 0.00-14.00pH Resolution: 0.01pH Accuracy: ±0.05pH Calibration: two points automatic calibration
Reference: RBD-0963
Current and voltage display in turn, easy and comfortable to use. Small and portable, do not need other power supply. Measuring range: DC 3V – 9V / 0 – 3A (up to 5A ) Portable Device Interface: USB2.0, USB3.0 Product Weight: 0.025 kg Two output ports
Reference: RBD-1168
Item Name: TDS meter Meter Material: Plastic Display: LCD Digital Accuracy: +/- 2% Range: 0-9990 ppm
Reference: RBD-1177
This signal generator can use 4-20mA to generate voltage and control the current in the circuit. Accuracy up to 0.01; Liquid crystal display; Rotary encoder adjustment ; Two connection terminals are non polarity. Output range can be set; 4-20mA (device control) / -21mA (signal debugging) Display mode can be set, it is convenient for you to see the value...
Reference: RBD-1323
160x128 TFT display Multi function key. Transistor test area. Zener Diode test area. IR receiver window. Micro USB Charging Interface. Charge indicator LED.
Reference: RBD-1518
Operating Voltage: DC 4.8-6V Offer 3 modes to check servos or ESC The Manual Mode allows you to turn the knob to different speeds and check the reaction time The Neutral mode makes the servo go back to the neutral point The Automatic ’’Window Wiper’’ Mode makes the servo swing like a window wiper in the largest angle possible Connect to up to 3 servos...
Reference: RBD-1528
Input: 1S-8S Battery Battery type: Lipo/LiFe/Li-ion/LiMn It has a Buzzer Alarm for low voltage indication. Useful for measuring each cell voltage. Cell Voltage Display Range: 0.5v-4.5v Total Voltage Display Range: 3.7-36v Alarm set values: Off or 2.7-3.8v
Reference: RBD-1556
Model: XH-M240 Display accuracy: 0.1 Measurement accuracy: 1mAH Power supply: DC 5V-12V Standby current: 5-7mA
Reference: RBD-1689
Professional Diamond Selector II, Gem Tester Pen Portable Electronic Diamond Tester Tool for Jewelry Jade Ruby Stone Products are being tested.
Reference: RBD-1718
Model: BT-168 PRO Product Name: Digital Battery Tester Type: Pointer Voltage Measurement Rated Voltage: 9V Measurement Accuracy:0.1V
Reference: RBD-1725
Power supply: DC 12V 1A Power range: 0~150.00W Capacity range: 0~999.999Ah Low voltage stop range: 0~150V
Reference: RBD-1749
2 in 1 Type C USB Tester Color Screen LCD Digital Multimeter, Voltage Current Detector USB Cable Charger Indicator DC3.6-30V/0-5.1A
Reference: RBD-1758
Digital LCD Power Supply Tester for PC ATX/BTX/ITX 4Pin SATA HDD
Reference: RBD-2054
Multi-functional transistor tester. Automatic detection of NPN and PNP transistors, FET, diodes, dual diode, thyristor and SCR. Automatic identification of the transistor pinout. Can be used as a Square signal generator. Can be used as a PWM signal generator.
Reference: RBD-1684
8 Channel DC 12V Pro mini Relay Shield Module PLC Timer Board for Arduino
Reference: RBD-0492
Proximity-sensing / Diffuse Type Voltage: DC 6-36V Current: 300mA Sensory Distance: 5mm
Reference: RBD-1675
Model: PZEM-004T Operating Voltage: 80-260VAC Test Voltage: 80-260VAC Rated Current: 100A Rated power: 100A / 22000W Operating frequency: 45-65Hz Measurement accuracy: 1.0
Reference: RBD-0695
Integration Lowers System Cost, Simplifies Design Efforts, and Reduces Design Cycle Time High Accuracy Facilitates Meeting Error Budgets 15-Bit ADC Resolution; Nominal Temperature Resolution 0.03125NC (Varies Due to RTD Nonlinearity) Total Accuracy Over All Operating Conditions:
Reference: RBD-1857
Output: NPN Model KT-RG22 Coaxial reflection type Supply voltage DC10-30V±10% Can be used in all kinds of machines
Reference: RBD-2210
Photoelectric switch sensor DC 10-30V power supply Working current: 200mA Induction distance: 5-30cm Response time: 1ms Output form: DC three-wire normally open NPN NO Detection object: Transparent / opaque object
Reference: RBD-2171
Mean Well RS-100-24 Switching Power Supply SMPS Provides 108W of power with a voltage output of 24V DC and current output of 4.5A Universal connection system for easy integration into various systems Built-in protections against short circuits, overloads, and overvoltages Efficient cooling through convection air and durable design with high-quality...
Reference: RBD-2009
Digital Auto Counter Meter with Hall Effect Proximity Switch Sensor (Battery Powered) No Power Required Digital Counter Meter Battery Attached Hall Effect Proximity Switch Sensor Connect Hall Effect Proximity Switch Sensor 2 wire to counter terminals 1&2. If the sensor detects a magnet it will start to count.
Reference: RBD-0321
New PT-100 Temperature Sensor AvailableClick Here PT100 Platinum Resister Temperature Sensor Waterproof Probe -20℃ ~ 450℃
Reference: RBD-1824
Material: ABS Color: Yellow + Black Power: 2 x AAA Battery (NOT INCLUDED) Very Lightweight LED Light at tip for Dark sites
Reference: RBD-1568
Transmission distance: 1.2 mile (RS-485), 5 meters(RS-232) Transmission Speed: 300-115200 bps Working Modes: Asynchronous, half-duplex, differential transmission Transmission Media: Common wire, doule wire, UTP or Shielding Line Work Environment: -10°C to 85°C
Reference: RBD-1401
Measured variable Position Measuring principle Magneto-resistive Ambient temperature -40 °C ... 70 °C Repetition accuracy 0.2 mm Switching output PNP Switching element function N/O contact On time ≤1.3 ms Switch-off time ≤1.4 ms Max. switching frequency 150 Hz Max. output current 100 mA Max. output current in mounting kits 50 mA Max. switching capacity DC...
Reference: RBD-1344
Supply voltage range: DC 7 V ~ 35 V Output voltage signal: 0 ~ 2.5 v, 3.3 v, 5 v, 10 v, 15 V. 4-20mA to 0-15V,0-5V,0-10V
Reference: RBD-1870
Compatible with 3.3V and 5.0V power supply. Compatible with 3.3V and 5.0V signal. Semi-hole pads, onboard module, thin PCB, having a thickness of 0.8mm. Has RXD, TXD signal indicator light, monitor send and receive status.
Reference: RBD-1834
PT100 to 0-5V Converter Voltage Signal Conditioner PCB-mounted
Reference: RBD-1847
Compact Design Country Specific pressure Multiple Displayable Unit Multi-colored, two-part display Alphanumeric display Discontinued by Manufactured 2017
Reference: RBD-0276
The INA125 is a low-power, high-accuracy instrumentation amplifier with a precision voltage reference. It provides complete bridge excitation and precision differential-input amplification on a single integrated circuit. A single external resistor sets any gain from 4 to 10,000. The INA125 is laser-trimmed for low offset voltage (250µV), low offset drift...
Reference: RBD-1561
24V, 4-20mA, -50 - 150C WEIGHT: 350.00g DIMENSIONS: 4.00cm x 4.00cm x 1.50cm
Reference: RBD-1829
0-9999 Ohm Simple Resistance Box Precision Variable Decade Resistor Instrument PT-100 Simulator Can be used to simulate PT-100 Sensor for calibration purpose
Reference: RBD-0493
Temperature Range : 0C-400C Shield Material : Metal Total Length(Approx.) : 2M / 6.6 Ft; Weight : 46g;
Reference: RBD-1739
PT100 Temperature Transmitter 0-200 Celsius Range 4-20MA DC 24V
Reference: RBD-0383
Wide Supply Range: 2.0v To 5.5v Low Current Consumption Continuous Mode: Only 150µa Single-shot Auto Shut-down Programmable Data Rate: 8SPS to 860SPS It has Internal low-drift voltage reference
Reference: RBD-1823
Power Supply: external micro USB-5V. Voltage Output: 0-10V. Current Output: 0-20mA. Multiple Display: just push the small button to switch the display mode
Reference: RBD-2183
Digital auto counter meter with infrared proximity sensor 24V power supply Adjustable sensing range from 3 to 80 cm Easy to mount chassis Diffuse reflective type light source DC 3-wire NPN-NO output Sensory distance regulator and output LED indicator
Reference: RBD-1860
Model KS-RG22 Coaxial reflection type Supply voltage DC10-30V±10%
Reference: RBD-0965
Carlo Gavazzi Solid State Relays, RJ1A Series Item# RJ1A23D20U SSR SOLMINI 230V 20A 5-32VDC U
Reference: RBD-1916
IC Chip: MAX3232 Operating Voltage: 3.3-5.5V It can be used to program STC MCU, NXP MCU, Renesas MCU, STM32 MCU, N+-2EC MCU Pre-assembled compact size board Suitable for use with most microcontrollers Operates up to 250 kbit/s
Reference: RBD-0737
Power supply:5VDC/160mA Switching Voltage (VAC):240@2A Isolation: Phototriac
Reference: RBD-0319
Type K Type. Mounting thread: M6 Temperature Range:0-600°C. RoboticsBD
Reference: RBD-0022
This is the HC-SR04 ultrasonic distance sensor. This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit. There are only four pins that you need to worry about on the HC-SR04: VCC (Power),...
Reference: RBD-0987
Compatible with Arduino NANO All digital and analog pins breakout Compact size; External power supply current support Leads all pins out, convenient for wiring and doing experiments.
Reference: RBD-1300
Size: 5mm Color: BLUE Head Shape: Round Lens Appearance: Transparent
Reference: RBD-1003
Fixed output voltage is 5V Output current is 0.5A Dropout voltage is 2V Maximum DC input voltage is 35V Output transition SOA protection Output voltage tolerance is 4%
Reference: RBD-1595
50mm diameter 12 LED Dimmable 50-degree viewing angle
Reference: RBD-1634
Size: 0.91 inch Resolution: 128 x 32 Controlling Chip: SSD1306 Display Area: 22.384 x 5.584mm Driving Voltage: 3-5V Operating Temperature: -40~70 celsius Interface Type: IIC Light Color: White
Reference: RBD-0761
Breadboard friendly Mounting Style: Through Hole Mounting Direction: Vertical
Reference: RBD-1069
Wheel Outer Diameter: 44MM Wheel width: 18 mm Tire material: Rubber Color: Black & White Weight: 18 gm Coder Accuracy: 12 pulses per revolution Wheel weight: 19.4 gm.