Hello, Guys
This is my college project. In this project, we have made 4 channel Relay board with built-in wemos D1 Mini as controller.we have made this PCB layout in EDA online pcb design tool. It is really easy to use.We have made this PCB by the manual etching process.
Many thanks to @Costas for helping me.& as all always many thanks to Blynk team for making Amazing Platform.
You can access my project here & you can also make changes to it.
!