This pcb is designed for the course PMI (Practical course Microcontroller and Interface electronics) as a breakout board for right morpho connector (CN10) of STM32 Nucleo-64 boards. It distributes several signals and bus systems like SPI, I²C, 1-wire, UART and GPIOs. Signal distribution is achieved by pin sockets and headers. The headers can be used to tap signal for anaysis with oscilloscopes or logic analyzers. It also features a 3.3V LDO voltage regulator for power supply and an on board 1-wire DS18B20+ temperature sensor. SPI Chip selects, I²C pull-up resistors and 1-wire parasitic power supply can be enabled over solder bridges.

There are interfaces for GY-291 (ADXL345 accelerometer) and GY-271 (HMC5883L magnet sensor) as well as for our PMI-ALICE and PMI-CARLOS breakout boards. Vertical pin sockets are compatible with Digilents Pmod interfaces.

An interactive html BOM file with pcb layout and material placement can be found here.

• First prototype

• First release

• onewire: Add parasitic power bridge
• pcb: Increase spacing between power section and morpho socket

• Convert project to Kicad 6
• Round pcb corners
• Update linear regulator from MCP1703T-3302E/CB to MCP1703AT-3302E/CB