My first PCB design.
Includes placeholders for NodeMCU board, DS3231 RTC module, and RS485 serial converter module (based on MAX485 chip).
The program supposed to send serial strings over RS485 bus to a home control system, based on pre-set times.
USB dongle Real time clock For raspberry Pi (which does not have one)
Initializes as a USB Serial port when plugged in to any computer and times can be read and set via serial commands
Microchip XC8 Project attached below
PCB Shown is revision 3 as I have been trying to fit it into a small USB dongle enclosure, the one it seems to fit best is the USB-7201-G from Bud Industries.
Time based control for drip irrigation system, with 16x2 LCD (HD44780) for status and configuration.
I designed the board single sided for easy etching at home.
Originaly created using Eagle, and then imported to EasyEDA.