power digital counter for 220v

[shoja]

ade7756an

hi every body
i am a electronic student,
i want to make a digital counter for home (220 V 25 A ), now i need some information on how to conver AC current to a variable voltage and change it to digital and display it .
any help would be appreciated.

 

[chinara]

ic1 ade7756an

Use transformer. It should be helpful to decrease the voltage.

 

[ezpcb]

power consumption digital counter

Ti has a all-silicon total solution based on MSP430, with built in LCD controller. NS also has such solutions based on their cop8 microcontroller.

mike

 

[Borber]

how to calibration many digital kwh in one time

Trully, it is not clear, do you need to measure power consumption or just a current.

 

[shoja]

stp30ne06l logic mosfet

i mean measure power consumption .

 

[shoja]

power on counter 24

i need to measure the amount of power that used by customers at their homes (KWH ,25 A ,220 V,50 HZ)and then change the amount of power to data(ADC).
then display the number.
thanks ,i am waiting.

 

[Borber]

digital counter for power hour

Here is project with PIC.

 

[AndrzejM]

10 minutes digital counter

i need to measure the amount of power that used by customers at their homes

I think that AD7755 energy meter could solve your problem.
try to find application note and data sheet on Analogue Devices pages.

 

[IanP]

digital kwh reading

Here is an example of a power meter based on Analog Devices IC:
https://www.analog.com/UploadedFiles/Application_Notes/528608457AN641_0.pdf
Maybe you will find some usefull info for your design ..

 

[Borber]

power ic 220v measure power

Here is another one.

 

[7rots51]

design a digital kwh counter

To Barber:
Cab you give more information on your post before we download it,what is its content,from where it is given,what ICs used for WHM,spec,......

 

[Borber]

typical tolerance of a digital counter

It is a copy of well known magazine article. Software included. Description:

Main Features
Displays power in Watts
Displays energy usage in kWh
Displays measurement period in hours
Displays energy cost in dollars and cents
Brownout detection and power switching
LCD module shows several readings simultaneously
Calibration for power, offset and phase
Adjustment of cents/kWh for cost reading
Adjustment of brownout voltage threshold, calibration, hysteresis & duration.
Optional delayed return of power after brownout is restored to normal voltage

Specifications
Wattage resolution 0.01W
Maximum wattage reading 3750.00W
Kilowatt hour resolution 1Wh (0.001kWh)
Maximum kWh reading 99999.999kWh
Cost/kWh resolution 0.1 cent
Maximum cost/kWh reading $9999.99
Cost/kWh setting from 0-25.5 cents
Timer resolution 0.1h (6 minutes)
Maximum timer value 9999.9h
Timer accuracy (uncalibrated) typically ±0.07%
Maximum load current 10A (15A surge)
Reading linearity 0.1% over a 1000:1 range
Frequency range of measurement 40Hz to 1kHz
Battery current drain during back-up 10mA
Accuracy Depends on calibration (error can be <0.5%)
Accuracy drift with temperature 0.002%/°C
Brownout voltage detection accuracy after calibration ±2%
Brownout return delay 18-24 minutes
Wattage calibration adjustment 0.0244% of reading per step (±2048 steps)
Zero Offset adjustment 0.12% of reading per step
Current monitoring resistance 1% tolerance, 20ppm/°C coefficient

Semiconductors

1 ADE7756AN Active Energy Metering IC (IC1)
1 PIC16F628A-20P programmed with wattmetr.hex (IC2)
1 LM2940CT-5 low dropout 5V regulator (REG1)
1 STP30NE06L logic Mosfet (Q1)
1 W04 1.2A bridge rectifier (BR1)
3 1N4004 1A diodes (D1,D2,D6)
3 1N914, 1N4148 switching diodes (D3-D5)