u/Snoo65155

First of all the routing of traces, i didnt put much thought behind them at all since i assumed the ckt to be very simple, i balled on the routing part. I hope it isnt going to be too much of an issue.

I have tried charlieplexxing 20 LEDS (0805) using an ESP32 C3 SUPER MINI. This thing is going to be powered by hooking the pcb to the phone (Samsung M22) using a USB OR using 3 AAA batteries (4.5V + high current i assume) enclosed in AAA battery holder, purely depending on the aesthetic.

I have used 5 150ohm resistors to limit the current in the leds to around 7mA max (rough estimate since the LEDS i am getting dont have any datasheet and they are my only option)

I have 4 header pins for an I2C 1.3 inch oled display.
My plan is to use the esp to make stars (led) in the perseus constellation all light up at the same time by switching them extremely fast to make it look like they are all on. Some of the leds are suppose to dim periodically too. How possible is this to achieve ? Thanks for the review

Cracked JEE 2025 through self study using these books. Im now a 2nd yearite at BITS Pilani (ECE). Since I no longer need them im selling them at less than half of their original price.

Pages are well maitained.

Prices are discounted yet im ready to negotiate further to lower the price much further.

I can deliver them to a convenient location in and around of Jamshedpur.

Most of these are older editions but the JEE syllabus has only been reduced slightly and the vast majority of the theory and practice problems are still relevant. They are excellent for preparation at a much lower cost than buying new books.

Feel free to reach out in dms and comment. Thank you very much.