Digital Voltmeter for Embedded projects
this is very useful model to digitally display the voltage level of your batteries
mostly this type of module can show voltage range from 3.6V to 30V DC & 0V to 30V DC
There are basically two types of Digital Voltmeter modules available in market
1)Two Wire Module
Two wire module can directly connect to the voltage source whom voltage level need to be check as shown in figure.
2) Three wire Module
The Three wire module have three wire Red, Black, Yellow. Red & Black is power supply for module and Yellow is for to measure the voltage connection as shown in figure.