created PCB layout to control things using mobile with the help of arduino

[kowshik1729]

@Ggreeshma-stani Nailed the PCB in terms of the schematic. But you got it a little bad on the layout side. There are some thumb rules while designing a layout of PCB.

1. Always place the oscillator and it's capacitors(C1, C2) near to the IC. If you have a doubt on this try checking the Arduino boards or any other boards. you will find an SMD chip crystal alongside of the Arduino XTAL pins. If you ask the reason for this that's simple, to avoid noise creeping in. Crystals provide the clock to the entire digital logic inside the IC. So, there should not be any noise in it. If noise is there, obviously you'll have timing issues.

2. The bypass caps on the voltage regulator must be placed close to the regulator's input and output pins. The reason for this is also pretty simple, bypass caps will filter out noise coming from the power supply and few other reasons too. So, try placing these bypass caps as close as possible to IC.

Apart from these points, the PCB looked good. Great work. Remember that this message is not to discourage you but just to give a suggestion so that you'll improve it in the next design.

[salmanfaris]

Thanks, @kowshik1729 Good suggestion, @Ggreeshma-stani consider suggestion mention above.

also, try to minimize the board if you don't need that much size because PCB cost also depends on the board size too.

[Ggreeshma stani]

@kowshik1729 sir i have made the appropriate corrections.
and thank you for notifying me on the errors

[Ggreeshma stani]

@salmanfaris yes sir i have made the changes and have minimised the board size.

[kowshik1729]

@Ggreeshma-stani Pretty good than the previous design. I am able to see 2 crystals on the board. Can I know why did you use another one?

And finally, you can address me as kowshik. No need of sir