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AC Voltmeter using PIC ADC (0-300V)

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AC Voltmeter using PIC

how to calculate step size for an 0-300V ac voltmeter.
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Re: AC Voltmeter using PIC

Is this voltmeter so high you need steps to reach it?

Use a smaller voltmeter - it is cheaper than steps.

Or you could explain what the steps are and why you need to know, your question is so ambiguous it is impossible to answer.

Brian.
 
Re: AC Voltmeter using PIC

betwixt said:
Is this voltmeter so high you need steps to reach it?

Use a smaller voltmeter - it is cheaper than steps.

Or you could explain what the steps are and why you need to know, your question is so ambiguous it is impossible to answer.

Brian.
Click to expand...
:cry:
i m srry i wld be more specific for the nxt tym...... cld some one just tell me how shld i start with it??????
a 0-300V AC voltmeter using a PIC ( 10 bit ADC )
 

Re: AC Voltmeter using PIC

Well, if you want to measure using the ADC and you have 10 bits, that gives 2Λ10 possible results so the step size is 300/1024 = 0.293 Volts per step.

You have to decide if you are measuring AC peak or RMS and convert it to DC before you can measure it with the ADC. You might also have to make provision for higher voltages, for example, if your 300V is RMS and the waveform is a sine wave, the peak will be 300 x √2 = about 425V DC.

Brian.
 

AC Voltmeter using PIC

check



schematics
 

Re: AC Voltmeter using PIC

rajudp said:
check



schematics
Click to expand...
hey thanks both of you.... it's been first tym i had ever posted a query ...... got a nice response ...thanx a lot....
 

Hi Guys

I wanna check 5V, 4V, 3V in differet steps to equivalent Binary codes.

Can you pls tell how to go about it?
Basically, I wanna check if my 'conversion codes' work or not. So I would check conversion of each voltages and verify with the 10 bit generated Binary equivalent response.

Thanks for your great help.

Arin
 

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