4 layers61.8 × 79.8 mm
Owl mainboard
danieltyukov/owltunes
Owl-shaped Spotify remote for your desk and pocket: ESP32-S3 firmware, LVGL UI, KiCad PCB, 3D-printed enclosure, and owl v0 on the Waveshare AMOLED kit
107 partsMIT
4 layers46.3 × 38.6 mm
- Size
- 46.3 × 38.6 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 77
- Nets
- 55
- Pads
- 297
- Tracks, vias
- 466, 145
- Pours
- 15
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 24 Dec 2023
- Updated
- 17 Aug 2024
Overview
Rrr is an open-source printed circuit board by PositiveAltitude, from the PositiveAltitude/rrr-hardware repository on GitHub. It is a 4-layer board of 46.3 × 38.6 mm with 77 parts on 55 nets, routed with 466 tracks and 145 vias.
It is built around the ESP32-C3-WROOM-02-H4, TPS63802DLAR and BMP280, with the BMI270, MAX17048G+T10 and USBLC6-2SC6 among its other parts. Its parts include 27 resistors, 17 capacitors, 10 ICs, 8 connectors and 4 transistors. It belongs with the ESP32 and RISC-V boards of this library.
Main components
8
ESP32-C3-WROOM-02-H4
SMD,20x18mm-105dBm -40℃~+105℃ 2.4GHz 20.5dBm 345mA 3V~3.6V 82mA Bluetooth5.0 ESP32-C3 On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,20x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
TPS63802DLAR
VSON-10(2x3)-40℃~+125℃@(TJ) 1 1.3V~5.5V 1.4MHz、1.6MHz、2.1MHz 1.8V~5.2V 11uA 2A Adjustable Buck-Boost Buck-Boost Built-in Yes VSON-10(2x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
BMP280
LGA-8(2x2.5)-40℃~+85℃ 0.12hpa 1.5pa/K 1.71V~3.6V 1hpa 300nA 30Kpa~1.1bar I2C、SPI Integrated ADC and digital interface、On-chip calibration and non-volatile storage、Standby mode、On-chip temperature output LGA-8(2x2.5) Pressure Sensors ROHSBoschPressure Sensors
BMI270
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 16bit 2KB 3.5uA Accelerometer Gyroscope SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps LGA-14(2.5x3) Accelerometers ROHSBosch SensortecAccelerometers
MAX17048G+T10
DFN-8-EP(2x2)-40℃~+85℃ 1 2.5V~4.5V 3uA I2C Lithium Battery Not supported Not supported DFN-8-EP(2x2) Battery Management ROHSMaxim Integrated (Analog Devices)Battery Management
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
DMP1005UFDF-7
UDFN2020-6-EP-55℃~+150℃ 1 P-Channel 12V 1V 2.475nF 26A 47nC@8V 5.8mΩ@4.5V、7.3mΩ@2.5V、9.5mΩ@1.8V 516pF 747pF 900mW UDFN2020-6-EP MOSFETs ROHSDiodes IncorporatedMOSFETs
TYPE-C-31-M-12
SMD-30℃~+80℃ 1 10,000 cycles 16P 20V 5A 7.35mm Female Surface Mount, Right Angle Type-C SMD USB Connectors ROHSHRO ElectronicsUSB Connectors
README
README.mdRRR
This repo contains design files for experimental "RRR" flight computer for Thrust Vector Control model rockets. The main idea is to use an ESP32-C3 microcontroller (RISC V) and Rust programming language. So the name is Risc Rust Rocket. Please keep in mind that this is a prototype and a proof of concept, so expect issues and design mistakes. All parts were sourced from LCSC, so you can find LCSC part numbers populated for every component.
Know issues
- Inertia measurement unit Pin 12 (CSB) is wrongly connected to GND. It should be connected to VCC or floating. It is possible to fix this by carefully cutting two traces with a sharp knife under a microscope.
- Pyro channels transistors placed incorrectly. That could be fixed if you solder them rotated 120 degrees counter-clockwise. Looks quite ugly but possible.
Parts
77| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1, R5, R13, R15, R16, R17, R19, R21, R23, R24, R26, R27 |
| 8 | 100n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1, C11, C13, C14, C15, C16, C17, C18 |
| 6 | 22u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3, C4, C5, C6, C12 |
| 4 | ~ | MountingHole:MountingHole_2.2mm_M2_Pad_Via | H1, H2, H3, H4 |
| 3 | 4.7u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7, C8, C10 |
| 3 | LOGO | LOGO | G***, G***, G*** |
| 2 | 1.8k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R9, R10 |
| 2 | 2.2k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R11, R12 |
| 2 | 200 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R14, R25 |
| 2 | 470n | Inductor_SMD:L_1008_2520Metric_Pad1.43x2.20mm_HandSolder | L1, L2 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R18, R20 |
| 2 | 91k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R6, R8 |
| 2 | DMP1005UFDF-7 | SamacSys_Parts:DMP1005UFDF7 | Q1, Q2 |
| 2 | NMOS | Package_TO_SOT_SMD:SOT-23 | Q3, Q4 |
| 2 | TPS63802DLAR | SamacSys_Parts:TPS63802DLAR | IC5, IC6 |
| 1 | 1.2M | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R22 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R7 |
| 1 | 130k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3 |
| 1 | 511k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R2 |
| 1 | 806k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R4 |
| 1 | BAT | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J2 |
| 1 | BMI270 | SamacSys_Parts:QFN50P300X250X87-14N | IC2 |
| 1 | BMP280 | Package_LGA:Bosch_LGA-8_2x2.5mm_P0.65mm_ClockwisePinNumbering | U1 |
| 1 | BOOT/RESET | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Horizontal | J4 |
| 1 | BQ21040DBVR | SamacSys_Parts:SOT95P280X145-6N | IC3 |
| 1 | DISABLE | Connector_PinHeader_2.54mm:PinHeader_2x01_P2.54mm_Horizontal | J3 |
| 1 | ESP32-C3-WROOM-02-H4 | SamacSys_Parts:ESP32C3WROOM02H4 | IC1 |
| 1 | MAX17048G+T10 | SamacSys_Parts:SON50P200X200X80-9N-D | IC4 |
| 1 | PWM1 | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J5 |
| 1 | PWM2 | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J6 |
| 1 | PYR1 | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J7 |
| 1 | PYR2 | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J8 |
| 1 | SMA | Diode_SMD:D_SMA_Handsoldering | D1 |
| 1 | TYPE-C-31-M-12 | TYPE-C-31-M-12:HRO_TYPE-C-31-M-12 | J1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | WS2812-2020 | WS2812-2020:LED_WS2812-2020 | U3 |
| 1 | YELLOW | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2 |
| 1 | ~ | Package_SON:WSON-8-1EP_8x6mm_P1.27mm_EP3.4x4.3mm | U2 |
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Questions
How big is the Rrr PCB?
It measures 46.3 × 38.6 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Rrr use?
77 parts, built around the ESP32-C3-WROOM-02-H4, TPS63802DLAR, BMP280 and BMI270. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Rrr KiCad files?
From the PositiveAltitude/rrr-hardware repository on GitHub, at the commit this page was made from: the board is rrr.kicad_pcb and its schematic rrr.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Rrr design in my own project?
Its repository states no licence, so its author keeps all rights: ask PositiveAltitude before reusing the design.