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.

Register Log in

AC voltage and current measurement using an AVR

Status
Not open for further replies.
A

abe94

Member level 1
Joined
Jun 20, 2015
Messages
34
Helped
0
Reputation
0
Reaction score
0
Trophy points
6
Activity points
378
Hi. I want to measure and display AC voltage of around 200 - 220 V using an AVR and a 16x2 display. Now I've got the figured out , but I don't know how to sense and measure the voltage. To elaborate , the circuit is an AC voltage controller and I'm using the AVR to supply trigger pulses (PWM) to a triac. Apart from this , I've also got it displaying voltage , current and duty cycle info on the 16x2. Now , I want to display the output voltage to the load on the LCD , since it varies as I vary the duty cycle of the PWM trigger pulse to the triac (I'm using integral cycle control. Thats what the PWM is for.) . How do I go about doing this ? Any help would be appreciated. Thanks !
 

I think no need of TRIAC here.

Simply make circuit of voltage divider for ac voltage, then to the ADC pin of Uc.
For current measurement, use small size of CT (Current transformer), connect it to the ADC pin of uc.

You will get the proportional values for the varying input values.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top