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chandu13 · 23rd November 2007, 12:19 PM

hay,

Iam doing digital display for high voltage power supply.
In this supply I want display 0-2A current & 0-1000v voltage .Iam using 0.5 ohm 2W shunt Resister, Atmega32 controller
Can any body help me how to make signal condition circuit between shunt resister & controller by using amplifiers.

Regards

erosennin · 23rd November 2007, 12:49 PM

There is a similar discussion in a thread called "didital ammeter"
You need to be aware that resistors also have voltage ratings as well as power ratings. I also hope you didnt chose 2W by going 2^2*.5, as although this equates to 2W - it's a dangerous practice and you should use a 5W resistor.

http://www.electro-tech-online.com/e...l-ammeter.html

chandu13 · 26th November 2007, 08:55 AM

Thanks for the reply

I have to measure the current and voltage when 1KV,2A power supply connected to the load.

Please suggest suitable analog circuits & sites related .

Regards

nari

erosennin · 26th November 2007, 09:10 AM

Wellllll... you could buy a serious mutimeter, or as the other thread suggested a Current Shunt...

http://www.uoguelph.ca/~antoon/gadgets/shunts/shunts.html

Becareful eh... thats a 2kW supply you've got going there...

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23rd November 2007, 12:19 PM	(permalink)
chandu13	current hay, Iam doing digital display for high voltage power supply. In this supply I want display 0-2A current & 0-1000v voltage .Iam using 0.5 ohm 2W shunt Resister, Atmega32 controller Can any body help me how to make signal condition circuit between shunt resister & controller by using amplifiers. Regards

23rd November 2007, 12:49 PM	(permalink)
erosennin	There is a similar discussion in a thread called "didital ammeter" You need to be aware that resistors also have voltage ratings as well as power ratings. I also hope you didnt chose 2W by going 2^2.5, as although this equates to 2W - it's a dangerous practice and you should use a 5W resistor. http://www.electro-tech-online.com/e...l-ammeter.html __________________ What is a joule per second?*

26th November 2007, 08:55 AM	(permalink)
chandu13	current Thanks for the reply I have to measure the current and voltage when 1KV,2A power supply connected to the load. Please suggest suitable analog circuits & sites related . Regards nari

26th November 2007, 09:10 AM	(permalink)
erosennin	Wellllll... you could buy a serious mutimeter, or as the other thread suggested a Current Shunt... http://www.uoguelph.ca/~antoon/gadgets/shunts/shunts.html Becareful eh... thats a 2kW supply you've got going there... __________________ What is a joule per second?