Measuring AC 220V with ADC0804
Sat Oct 02 2010, 12:29 pm
Hello,
Parallel ADC needs lots of Pins of Microcontroller.
My Suggestion go to
CS5460 from Cirrus Logic..
MCP3202 from Microchip
Both Required 3 wires for interfacing with any Micro controller.
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--
Gurpreet Singh
IMBUENT TECHNOLOGIES PVT.LTD. (INDIA)
EMBEDDED SYSTEM TRAINING IN LUDHIANA,PUNJAB(INDIA)
" A person who never make mistakes,never try new things"
Parallel ADC needs lots of Pins of Microcontroller.
My Suggestion go to
CS5460 from Cirrus Logic..
MCP3202 from Microchip
Both Required 3 wires for interfacing with any Micro controller.
--
--
Gurpreet Singh
IMBUENT TECHNOLOGIES PVT.LTD. (INDIA)
EMBEDDED SYSTEM TRAINING IN LUDHIANA,PUNJAB(INDIA)
" A person who never make mistakes,never try new things"
sageliu like this.
Sat Oct 02 2010, 05:43 pm
see here afnan idea
http://www.8051projects.net/forum-t31555.html
see it for people discussion on ac voltmetr
http://search.edaboard.com/ac-volt-meter.html
and Abhinav.Chaurey now it is time to be happy for u i have found a circuit for Digital AC Voltmeter for u
it uses a digital ics but u can mange it now to display it on 7-seg or lcd
here is link for u
http://www.electronixandmore.com/project/dvm/index.html
keep happy
http://www.8051projects.net/forum-t31555.html
see it for people discussion on ac voltmetr
http://search.edaboard.com/ac-volt-meter.html
and Abhinav.Chaurey now it is time to be happy for u i have found a circuit for Digital AC Voltmeter for u
it uses a digital ics but u can mange it now to display it on 7-seg or lcd
here is link for u
http://www.electronixandmore.com/project/dvm/index.html
keep happy
[ Edited Sat Oct 02 2010, 05:51 pm ]
Abhinav.Chaurey like this.
Tags ac voltmeterdigital ac voltmeter
Thu Aug 23 2012, 09:15 pm
@ gohilurvish
yes u can discuss every thing but in proper forum
for pic generate thread in pic category
yes u can discuss every thing but in proper forum
for pic generate thread in pic category
Fri Aug 24 2012, 11:03 am
Thanks majoka.
Actually I am currently making a project to measure AC voltage in range of 100s of Voltage (mostly 100-400v).
My circuit goes like this. (will upload the diagram in some time)
Power supply is a 9v Battery.
uC is ATmega8/16.
AV volt will come to a half wave diode rectifier. (for AC, P will go to diode and N will go to circuit's ground)
the output has a voltage divider (330k : 2k) which will scale it down to <2.5 v.
A Cap of 100uF parallel to 2k res.
A zener of 5v parallel to cap/2k res (just to protect uC's pin).
and the output of 2k res goes to uC's ADC.
uC uses internal 2.56v reference.
Now, as the input of ADC will keep varying, I take the ADC for around 5000 times (each will take max 200us). I pick up the max value and show it on display (3 seven seg, muxed).
Issues
======
Biggest issue is, the output will keep varying and move by +/- 8 volt.
I am fine if the scanned value is incorrect by some margin (5v) but cannot tolerate the varying value.
Adding more cap will slow down the rate of change and hence, change of voltage will take a few seconds to reflect.
And idea where the mistake can be?
I will upload the code as well. (would be written in BASCOM-AVR).
Any inputs are appreciated.
Actually I am currently making a project to measure AC voltage in range of 100s of Voltage (mostly 100-400v).
My circuit goes like this. (will upload the diagram in some time)
Power supply is a 9v Battery.
uC is ATmega8/16.
AV volt will come to a half wave diode rectifier. (for AC, P will go to diode and N will go to circuit's ground)
the output has a voltage divider (330k : 2k) which will scale it down to <2.5 v.
A Cap of 100uF parallel to 2k res.
A zener of 5v parallel to cap/2k res (just to protect uC's pin).
and the output of 2k res goes to uC's ADC.
uC uses internal 2.56v reference.
Now, as the input of ADC will keep varying, I take the ADC for around 5000 times (each will take max 200us). I pick up the max value and show it on display (3 seven seg, muxed).
Issues
======
Biggest issue is, the output will keep varying and move by +/- 8 volt.
I am fine if the scanned value is incorrect by some margin (5v) but cannot tolerate the varying value.
Adding more cap will slow down the rate of change and hence, change of voltage will take a few seconds to reflect.
And idea where the mistake can be?
I will upload the code as well. (would be written in BASCOM-AVR).
Any inputs are appreciated.
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