3/4/2026 - Planning out what ill amek

I will be making a 16x16 grid using WS2812B Mini SMD RGB LED 3535 I added sample led footprint in a 100x100 pcb i can fit 256 so i will use using a ESP32 for the project because of its higher performance. A PN532 NFC RFID Reader Writer Module so that it can read the nfc card that i will make later in this project.

3/5/2026 - Made and routed the schematic and assigned footprints

First i looked for all of the items so i will be using an esp 32. 256 ws2812b led for 16x16 matrix. a PN532 NFC Module for reading the nfc card which will say what the pattern should be. Added 0.1uf capacitor on each led so that there will no flickers and random issues with the leds. Theres a 330 ohms resistor in the starting first led din so that the chain runs smooth. theres a 1000uf capacitor at starting for holding the whole matrix.

3/6/2026 11 AM - Fixed schematics and started pcb

I started with my pcb after schematics but then i saw that i have made 128 not 256

then i went back to schematics duplicated 128 and pasted and reconnected the wires

3/6/2026 8 PM - Redid half pcb and made new half pcb like in 100x100mm

So basically the pcb in last journal its was like
1,2,3,4,5
6,7,8,9,10
but it would be better to make it
1,2,3,4,5
10,9,8,7,6
like a perfect chain so i made the whole pcb in that chain it took the whole 100x100mm space i will be adding 3 pads for +5 GND DIN so that i cna solder the leds on then use esp 32 pins to solder with the 3 pads.

3/8/2026 - ROUTED THE PCB

I routed the pcb it took alot of time i routed the din and dout of led by hand. and filled gnd on front copper and 5v on back coppper then hand did the errors that were there of the copper filling not connecting to some led pads of some leds this is the final look here