ATmega328 Based PCB Design

This project is for the design of a ATmega328 based PCB allowing for: - On PCB power supply to power all components - Direct connection of mains voltage (110V-240V) via DIP 3-pin screw connection (earth, live, neutral) - the independent control of four mains voltage (110V-240V) HLS8L-DC3V-S-C relays via the ATmega328 in normally open mode embedded on the PCB allowing the switching of devices connected via edge mounted angled 3-pin DIP screw connectors each with a pin connected to the ground pin of the mains voltage connector (bullet point #2) - Green LED next to each relay's 3-pin screw connector allowing users to identify if the relay is open/closed (closed=LED on/open=LED off) - 4 x DIP 3-pin screw connectors allowing the external connection of DS18B20 1-wire temperature sensors to the ATmega328 i/o to read temperatures - 4x2 female connection block allowing the connection of a ESP8266 (with sufficient clearance) connected to ATmega328 i/o pins and power supply as appropriate - Edge mounted micro-SD card slot wired to i/o of ATmega328 All parts should be sourced from the Seeed Open Parts Library ([login to view URL]) where possible An example of a similar concept which could be used as the basis of the design can be found here: [login to view URL] PCB schematics should be provided upon completion and review in Eagle CAD format or other appropriate format allowing for future modification as required. The design should conform to EU safety standards where appropriate. No code is required, only the PCB design.