Hello Can some check my Layout anything wrong with this schematic diagram

 

Two problems.

1) You are missing power supply decoupling capacitors between pins 4 and 8.

2) Your circuit is not safe if it is to be connected to AC line voltage.

 

Two problems.

1) You are missing power supply decoupling capacitors between pins 4 and 8.

2) Your circuit is not safe if it is to be connected to AC line voltage.

Thanks.
but do you have any suggestions for the batter schematic diagram
I'm try making the Amp Meter using arduino

 

Thanks.
but do you have any suggestions for the batter schematic diagram
I'm try making the Amp Meter using arduino

Why do you need to connect to LINE and NEUTRAL?

 

Two words: track clearance.
Additionally, the circuit will clip the negative waveform and you may actually damage the LM358 with the negative voltage at its inputs.

 

Need a schematic of the analog portion of the circuit, not just a PCB layout wiring diagram, which is not a schematic.

Have you simulated or breadboarded the analog part of the circuit to see if it does what you want?

 

Need a schematic of the analog portion of the circuit, not just a PCB layout wiring diagram, which is not a schematic.

Have you simulated or breadboarded the analog part of the circuit to see if it does what you want?

i dont have the schematic, the diagram i get from download
and i just layout the pcb to etching

im not expert electronic engineer

 

im not expert electronic engineer

You don't have to be an engineer to draw a circuit schematic.
I can't really understand your circuit without converting your wiring diagram to a schematic with schematic symbols for the parts, and the one that wants free help is the one to do that conversion.

 

Third problem: No power source connection in the "schematic".

Also, the circuit is not galvanically isolated from the AC mains. This means that anything else powered by the 5 V source is potentially (!) lethal.

Please post a link to the source of the circuit so we can see what it is intended for and evaluate it.

ak

 

Additionally, the circuit will clip the negative waveform and you may actually damage the LM358 with the negative voltage at its inputs.

It looks like the peak voltage at the non-inverting input is less than +/-0.3 V

ak

 

CT2 is a GND connection. Move it all the way to the left below the GND pad.

Move CT1 as far right as possible.

Move the 47 ohm resistor (REFERENCE DESIGNATORS!) to the left, between CT1 and CT2. This eliminates the jumper and its pads.

What is the outside diameter of the pads for the IC? What is drill size? What program are you using to create the layout?

You *really* need to add reference designators to each component both on the schematic and on the layout.

ak

 

Third problem: No power source connection in the "schematic".
ak

Appears to be from the 5 volt USB connector on the Arduino board.

 

Appears to be from the 5 volt USB connector on the Arduino board.

There is nothing on the "schematic" to indicate if that pin is an input or an output. If an output, what powers it?

ak

 

There is nothing on the "schematic" to indicate if that pin is an input or an output. If an output, what powers it?

ak

It's an output pin powered from the USB connector mounted on the left end of the Arduino.
Or powered via the Vin pin on the Arduino (7 to 12 volts).

 

Two problems.

1) You are missing power supply decoupling capacitors between pins 4 and 8.

2) Your circuit is not safe if it is to be connected to AC line voltage.

I 100% agree with these remarks, but if I can say, it is 10000 times more important to stress to the TS, how much this is NOT SAFE to be connected to 220V AC.
So the list of issues would be:

1. NOT SAFE FOR LINE VOLTAGE.
2...
3...
4...
...
..
xx. You are missing decoupling caps.


To address this issue, in my opinion you have 2 options, to design 5VDC power supply with transformers, rectifier and other components (you can find various schematics online). This would have to be a second PCB in your project. Or you can buy a separate power supply for 5VDC, which are cheap, this project doesnt require much current at all so you can probably find a supply for less than 10 dollars.

 

Use a transformer for the power supply.

It will save the mains from killing you or someone else.
The extra diode after the bridge rectifier isolated the mains voltage sample from the smoothed DC supply.
The pot is used to set the voltage sample level.

 

And please, any PwS design you use... add a fuse... (see, it rhymes)

 

Mains-direct projects are especially dangerous for the inexperienced, and the board layout definitely needs work.

BUT

The peak mains current is 120 uA and it takes *five* component failures for this to increase to a level that still is too low to trip a GFI circuit. To me this means that the circuit is not automatically disastrously dangerous. The problem is with whatever the USB cable is connected to. If it is a wall wart, then things just need adjusting. If it is a computer, that is a *big* problem.

And . . .

This is for any up-to-date safety agency gurus out there:

It's been a while since I've done this for real and the rules probably are tighter, but - for a mains-connected, low energy device such as this, aren't two resistors in series with the line sufficient for safety agency approval (assuming a better board layout, a fully insulated case, etc.)?

ak

 

Hello Can some check my Layout anything wrong with this schematic diagram

your PCB layout is ok. personally i like to add some holes for mounting board.

 

still not a schematics but a hell lot easier to follow: