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Tested PIC 16F877A ADC C code on HITECH MPLAB with 4 MHZ Xt..

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DHANANJAYA L

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Dear Sir i am doing a project on pic16f877a for multichannel ADC i.e 3 phase 415 volts Analog voltage to digital voltage using PIC ADC on display on LCD 4 bit mode using 4 MHZ XT crystal oscillator if have solved these type of projects plese let me know with code

Thanks & Reagards
Dhananajaya
 

Here a project I did a digital voltmeter upto 220v-dc. You can change this project an use it.
First by changing the voltage divider part you can increase the range over to 415v-ac,
And by using timer and array you can get samples and then by arranging the measured values you can change it into ac,
Be careful about choosing resistor, the scaled resistor's voltage should be less or equal to 5v (use a 5v zener diode to be sure- or over voltage problem) otherwise your pic can burn.
 

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tusemo said:
Here a project I did a digital voltmeter upto 220v-dc. You can change this project an use it.
First by changing the voltage divider part you can increase the range over to 415v-ac,
And by using timer and array you can get samples and then by arranging the measured values you can change it into ac,
Be careful about choosing resistor, the scaled resistor's voltage should be less or equal to 5v (use a 5v zener diode to be sure- or over voltage problem) otherwise your pic can burn.
Click to expand...


Dear Sir i am doing a project on pic16f877a for multichannel ADC i.e 3 phase 415 volts Analog voltage to digital voltage using PIC ADC on display on LCD 4 bit mode using 4 MHZ XT crystal oscillator . I have sucessfully find the digital voltage in single phase but I am to do the three phase voltage in a single PIC chip . I think PIC doesn't support different phase voltage i.e reference voltages(Vref+ & Vref_). I have using separate step down transformers to 5 volts. I have tried the AC to DC conversion and connect to PIC analog pins. the digital voltages ADC is fluctions it doen't give constant voltages irregularly..Please if you any solutions please let me know with circuits & code

Thanks & Reagards
Dhananajaya
 

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