Close or Esc Key

Arduino Projects   |   Raspberry Pi   |   Electronic Circuits   |   AVR   |   PIC   |   8051   |   Electronic Projects

Arduino Based Voltmeter

Description

Comments

how to separate the code for measure 500VAC?

In my project i need measure 120VAC! The voltmeter measure this value or the peak? The peak is 170VAC!!

It will measure Vp. That is the peak voltage as we are using the rectified AC
It will measure Vp. That is the peak voltage as we are using the rectified AC

Hi, thanks for share the great project! how we use the function, range selector ? i notice there are two selector in the circuit, one for the voltage range with 4 selection, one with 5V supply but i not sure what to label and fucntion for them can you advice ?

HI 

I WANT TO MONITOR 220V AC. WHAT RESISTOR VALUE SHOULD I USE?

Use a voltage dividor of 1m & 10k with a diode at the input.

Hi Ajish Alfred,

I have read your project and I would like to built both circuits dvm volts and amps on home power supply. I really want to know what do I have to do to add both codes into one in order to have both information voltls and amps on the same LCD 16x2. I have some experience in electronics but I am starting with arduino codes and circuits, I mean, I am at 'Hello, world' level yet..

I really appreciate your help. If you need write me at: cad.rj.2015@gmail.com

Nice project, congratulations!!

Carlos 

Hi, I forgot to say that I use an arduino Uno R3 board.. regards

Hi,

Hi, You will have to make an addl circuitry using resistor network and use analogRead to read the data and then code it to display

Hi,

Hi, You will have to make an addl circuitry using resistor network and use analogRead to read the data and then code it to display

Hi,

Hi, You will have to make an addl circuitry using resistor network and use analogRead to read the data and then code it to display

Hi,

Hi, You will have to make an addl circuitry using resistor network and use analogRead to read the data and then code it to display

Hi,

Hi, You will have to make an addl circuitry using resistor network and use analogRead to read the data and then code it to display

Hi,

Hi, You will have to make an addl circuitry using resistor network and use analogRead to read the data and then code it to display

Hi,

Hi, You will have to make an addl circuitry using resistor network and use analogRead to read the data and then code it to display

Hi,

Hi, You will have to make an addl circuitry using resistor network and use analogRead to read the data and then code it to display

Hi,

Hi, You will have to make an addl circuitry using resistor network and use analogRead to read the data and then code it to display

Hi,

Hi, You will have to make an addl circuitry using resistor network and use analogRead to read the data and then code it to display

in 500VAC burn 1N4148???

so long as the voltage potential between anode and cathode are within specs (75v i think) you should be ok ... ( to a point)

I'd use a 1n4007 or uf4007 in place of however 

sir, i want mesure 230v ac 50hz supply by ardino with optocoupler for safty purposeand how to connect the optocoupler with the arduino    

This isn't going to work if you're measure voltage across a load though, or measuring voltage drop across some resistor. You need a really good and stable voltage attenuator instead of a resistor divider.

the resistor divider is an attenuator and it will work quite well except, the AC inputs will be offset by the diodes forward drop, and the AC will do peak V and not RMS. If your waveform is badly distorted it will be quite a bit off. The diode drop can be adjusted out over a large range of inputs, and the RMS can be factored out if the input is a polite sine wave. You would do these corrections in software. 

 

" No need for step down transformers because we are already getting a voltage ‘V2’ in the range of 0 to 5 V only, across R2."

The other reason to use a step down transformer is to isolate the Aduino from the AC circuit. Of course that 'assumes' one uses an transformer that does not have a common ground between the primary and secondary coils.

if i need to measure 48V with 65mAh thus above circuit work for me, and if yes how much will be the error percentage.

i just want to combine dvm ,dam with dom. Is itpossible by connecting the 3 indivitual circuits and then switching between them to get the desired output?

What are the Arduino to LCD pin connections ?

I want to submit project so please help me 

i want to build a similar project that can measure 0-60Vdc and 0-600Vac with dual point measurement capability. The system must display at the same time both local and remote values. What can i  add to enhance the circuitry to my requirements.

Hello Sir,

Will anything worse happens if we connect diode directly to 230 AC supply?

Will the diode withstand huge voltage?

 

Hello Sir,

I tried the above circuit but I failed to get the output whenever I vary my AC input.I used a variable transformer to supply AC input and based on my AC input equivalent DC output was produced but in Arduino I did not get the actual output.Please help me

 

]]>]]>