2 layers65 × 56 mm

RPi RTC RS232
bluespider42/RPi_RS232-RTC
A Raspberry Pi 2 (or B+) expansion board providing RS232 level serial communication, a high quality battery backed RTC and power controls.
16 parts1
Boards in 2 GitHub repositories, designed in KiCad, that use the MAX3222IPW by Texas Instruments (-40℃~+85℃ 1mA 2 2 250Kbps 3V~5.5V Transceiver Yes ±15kV TSSOP-20 RS232 ICs ROHS). See how each wires it, with its parts, size, README and files; the MAX3222IPW’s symbol, footprint and pinout are on its own page.

bluespider42/RPi_RS232-RTC
A Raspberry Pi 2 (or B+) expansion board providing RS232 level serial communication, a high quality battery backed RTC and power controls.

mwick83/irrigation_ctrl_hw
Irrigation Controller aiming to keep (my) plants happy - hardware repository