Voltmeter digital 0-30V built-in red glow

A digital voltmeter that is designed to measure the DC voltage of an electrical circuit. This device can be used in power supplies, chargers of various devices, etc. It can also be used to measure voltage in various electrical circuits by connecting the device to the terminals.

The features of this voltmeter are low cost and high measurement accuracy. A digital voltmeter was designed based on a seven-segment indicator, a control microcircuit and other auxiliary components. The display is designed to show the value of the current voltage. This voltmeter model has a red backlight. The voltage measurement range is from 0 to 30 V. The measurement error is about 1%.

Due to its small size and embedded design, the digital voltmeter can be mounted in the panel of someone's device. Mounting holes are located on the back of the case, allowing you to mount the device on a flat surface.

A digital voltmeter is connected to the measured electrical circuit using 3 wires. Pin assignments:

VCC (red wire): supply voltage 4.7 - 30 V
GND (black wire): ground
VIN (white wire): external device voltage measurement 0 - 30V
This digital voltmeter can be connected in 2 ways:
If the supply voltage of the measured circuit is in the range from 4.5 to 30 V, then the device can be connected directly to the circuit.
If necessary, the digital voltmeter can be connected to a separate power source, then the VIN pin must be connected to the measured circuit.
The device is powered by the measured electrical circuit or an external power source. The power supply voltage range of the device is from 4.7 to 30 V. Using a supply voltage above 30 V will damage the device. As protection against exceeding the permissible voltage value, it is recommended to install a fuse, suppressor, etc. on the input.

Technical parameters of digital voltmeter:

Range of measured voltages, V 0 ... 30
Supply voltage, V 4.7 ... 30
Measurement error, % 1
Input resistance not less than, kOhm 100
Current consumption, no more than, mA 18
Measurement time, ms 300
Display Color Red
Overall dimensions, mm 48 x 29 x 22
The size of the mounting hole for mounting, mm 46 x 27
Operating temperature range, °C -10 ... +65.