reading 230v AC

[satish]

please anybody can help how to read the 3 phase 230v AC and display on LCD using 8051 microcontroller..

[AJISH ALFRED]

Hi Satish,

I’ve done such a thing and it was working perfectly. You might know how to make a simple rectifier using step down transformer. The circuit is the same, step down the 230V into 5V using a step down transformer, rectify using bridge rectifier, eliminate the ripples using a 100uF capacitor.

Now give the output directly to the ADC and read the value. You might need some caliberation which you can implement in your code.

Be careful as you are dealing with mains supply!!

[balaji.n]

dear friends

 

I agree with the ajiseh commants using rectifier circuit

but in adc0804  module is 8 bit only so we should uptain the output for every 0.90volt per digitel reading so u want to more accurcy  u try with 10 bit adc  or otherwise use a pic micro controller its have inbuild 10 bit adc

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