Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Microcontroller based Mili Ampare meter current sense??

Status
Not open for further replies.

chand00786

Junior Member level 1
Junior Member level 1
Joined
Nov 2, 2010
Messages
16
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Visit site
Activity points
1,424
I want to make an AC mili ampare meter to measure the current between 0 to 1Amp.The required resolution of current is 10 mA. If i put 1 ohm shunt resistor in series with the load then the voltage drop across shunt resistor will be .01 ac vots which is not read by microcontroller ADC.Kindly tell me how to amplify this small voltage using op amp.If any one has circuit diagram of op amp to do this, please share it.Or suggest any other solution.
 

Google "precision rectifier".
You can add an opamp gain stage afterwards.

Will it be a sinewave? If so, the rectified voltage will be 41% higher than the RMS value.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top