DESIGNING THE CIRCUIT AND PCB

So this is the game circuit I designed it using easyeda. here I am using atmega328 as the heart of this project. Then I converted the circuit into PCB. I designed the PCB with a dimension of 89mm*50mm because this is the standard size of visiting cards. I used the insert image tool of easyeda to make the design. this is just about art you can make with your ideas. After designing the PCB I downloaded the Gerber file. Then I went to jlcpcb.com. I choose JLCPCB because they offer only 2$ for 5 PCBs. To order PCBs Just click on order now and select your Gerber file. after uploading, I choose the black colour .8mm thickness and placed the order. after 2 weeks I received the PCB. The PCB has only .8mm thickness but the quality is perfect as I expected.

COMPONENTS NEEDED

ATMEGA328P-AU* 1

0805 capacitor 22pf *2

0805 capacitor 100nF* 2

SMD WS2812B-B*16

0805 LED SMD* 2

0805 resistors 1K* 3

0805 resistors10K 1

16MHZ*1

micro USBFemale*1

download BOM from here

SOLDERING

after grabbing all the components I started soldering, I started with the micro USB port. Then I soldered all the other components. After soldering the control circuit I started soldering neopixel LEDs and after finishing that I soldered corresponding Switches. After 1 hour I completed all soldering and now our PCB looks like this.

PROGRAMMING

after completing the soldering I connected the USB cable and tested it. Now it's time to upload the code. I connected the spi pins to an ISP Arduino and uploaded the sketch

DOWNLOAD CODE FROM HERE

PLAY AND ENJOY

This is how I made a visiting card with a 4*4 tic tac-toe game PCB. You can download the circuit, code, and gerbers from the links. Hope you enjoyed and learned something from my tutorial.

VIDEO TUTORIAL