7-Segment Voltmeter Display Module

4.8 - 30V 3-Digit 7-Seg Voltmeter Display is a cheap and bright voltage display. It is able to display voltage measurement from 4.8V to 30V with an accuracy of 0.2V at below 12V and 0.02V above 12V. Comes with 3 digit seven segment display. A very simple yet useful display to monitor your voltage reading or measurement. Simply connect the red wire to the positive supply, and black to negative ground. The display has a microcontroller that will read the voltage, compare it to a stable reference and output the voltage to the 7-segment display. Applicable for most project that requires voltage display from 4.8V to 30V.

How To Use: 

1. Connnect the seven segment wire to your voltage supply, battery or voltmeter.
2. Connect the Red Wire (Positive) to Vcc or Vin.
3. Connect the Black Wire (Negative) to ground.
4. When the connection is done,turn on your supply (if there is switch)  if no switch,the seven segment will automatically display your suppply current output voltage.

Note:

• Please be careful and ensure thet your supply does not exceed the operating voltage because it could damage to your Seven segment voltmeter display.
• No polarity protection, please check the polarity .