PT MODULE AC OR DC VOLTAGE SENSING MODULE

Description

Ac voltage range= 0 to 275
DC Voltage range= 0 to 100
This ?circuit have 3 possibility of use.
1 Dc voltage Sensing
2 Ac voltage Sensing using Detecting Peak Value of Rectified and filtered sine wave .
3 AC?Voltage Sensing using Clamping Method and Peak Detecting  Without Filtering .
1 Dc voltage Sensing

This circuit have two options , 100V input sensing or 25 voltage sensinng. Its Very simple Circuit , all you need to select you range using jumper and calibration after ?burning ?example code in arduino. This is just divider curcuit.
2 AC?voltage Sensing using Peak Detecting ?of?Rectified and filtered sine wave .
? ?Here is circuit diagram of this board.

There is no need to power up this section , it just gives ready to use signal for microcontroller to measure.Only difference between this circuit and previous is rectification section.

This section converts input AC voltage to DC , and gives??these voltage to voltage divider section.
3 AC Voltage Sensing using Clamping Method And Peak Detecting ?Without Filtering .

In this circuit we are clamping sine wave and adjusting zero degree of sine wave to vcc/2 of microcontroller power supply.
This way we get complete sine wave even without losing 0.7v across diodes. In this board we can measure and monitor complete sine wave , either there is noise in sine wave , surge , or power fail.
Specifications:
PCB board size: 3 inch x 2 inch
Rated Input Current: 10mA
Retardation (rated input): “20′ (input 2mA, sampling resistance 100?)
The linear range: 0 ~ 300V
Isolation voltage: 1000V
Operating temperature: -40 ? C- 70 ? C
Only one section can be used at?a time , DC voltage measurement , or AC voltage measurement also only 1 circuit can be used at a time while measuring ?of AC voltage because ?of ground is different between both sections.