This is the Kicad Repo for Bob, an open-source flight computer and data logger for model rocketry.
- MCU: Raspberry Pi RP2040 Dual Core Cortex M0+.
- Flash: 2 x Wimbond W25Q128 16 MiB Flash chips.
- IMU: QST QMI8658C 16 G / 2048 DPS IMU
- Compass: QST QMC5883L
- Barometer: HopeRF HP203B
- GPIO: 16 GPIO pins broken out, plus access to internal I2C bus.
- Pyro: 2 x Pyro channels with continuity detection and separate arming switch.
| GPIO Pin | Usage | Broken Out? | Notes |
|---|---|---|---|
| GPIO 00 | - | Y | |
| GPIO 01 | - | Y | |
| GPIO 02 | - | Y | |
| GPIO 03 | - | Y | |
| GPIO 04 | - | Y | |
| GPIO 05 | - | Y | |
| GPIO 06 | - | Y | |
| GPIO 07 | Fire Main | N | |
| GPIO 08 | Fire Drogue | N | |
| GPIO 09 | Compass Interrupt | N | |
| GPIO 10 | IMU Interrupt 1 | N | |
| GPIO 11 | IMU Interrupt 2 | N | |
| GPIO 12 | I2C SDA | Y | |
| GPIO 13 | I2C SCL | Y | |
| GPIO 14 | Drogue Continuity | N | |
| GPIO 15 | Main Continuity | N | |
| GPIO 16 | Flash SPI RX | N | |
| GPIO 17 | Flash SPI CS | N | |
| GPIO 18 | Flash SPI SCLK | N | |
| GPIO 19 | Flash SPI TX | N | |
| GPIO 20 | Buzzer | N | Buzzer is only powered when battery is connected. |
| GPIO 21 | Arming Signal | Y | Reads status of the ARM switch |
| GPIO 22 | - | Y | |
| GPIO 23 | - | Y | |
| GPIO 24 | - | Y | |
| GPIO 25 | Status LED | N | |
| GPIO 26 | - | Y | May be used as analogue input |
| GPIO 27 | - | Y | May be used as analogue input |
| GPIO 28 | - | Y | May be used as analogue input |
| GPIO 29 | - | Y | May be used as analogue input |