Atmega328P based PWM controller addon-card for the ESP8266 Base Card

This is an Atmega328P based addon card for my ESP-12E I2C Base Card. It can also function independently as a custom Arduino type PCB, but with limited custom pins available. It was mainly designed to be used with a 12v PWM air blower, with PWM speed control, as well as a pulsed motor rpm feedback output. It features an onboard LDO regulator to make use of the already supplied 12v to power the air blower, to also power the other electronics on the PCB, after being stepped down to 5v of course. There are also headers provided for a rotary encoder to control the PWM, as well as additional GPIO pins on the plug-in 2x20 header at the bottom. All analog inputs (except for A4 and A5, which is used for I2C) are also broken out to a header, with 5v and ground pins close by for easy access. Firmware uploading is meant to be done via the ICSP header, as the UART will be used to drive a serial LCD screen in my actual project. This could however also be used to serially upload code if needed. PCBWay did their usual best with the manufacturing, Thank you