This voltmeter is intelligently controlled by a single-chip microcomputer, with a software positive function, which can obtain higher measurement accuracy. You can choose the appropriate range according to the measured voltage range to get the highest measurement accuracy. With upper and lower limit alarm output. It can be used to measure DC voltage, overvoltage and undervoltage protection of electronic products, and voltage range control. Electric vehicles, solar cells, etc., overcharge and overdischarge control in various battery applications.
project
parameter
Supply voltage
4-24V (The best working voltage for a long time is within 5-12V, and the linear LDO voltage regulator chip is used for power supply. The higher the power supply voltage, the greater the loss and the greater the heat generation. It is recommended to use a lower power supply to improve stability)
Working current
14mA or so
range
10V, 20V, 50V, 100V, 300V, 999V six options
10V range 0.01V,
20V, 50V, 100V range 0.1V,
300V, 999V range 1V
refresh rate
200mS
Alarm output signal level
High and low level 3.3V, low level 0V,
display color
Red/green optional, other colors can be customized
Input reverse polarity protection
Have
Wiring
Soldering wire (the default is 3-wire type, if you need two wires, please short-circuit R1 on the board)
Installation method
2 M2 screws
Operating temperature
-40~+85 °C
header size
29*23*10mm
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On Sep 26, 2022 at 21:02:31 PDT, seller added the following information: