6 layers73.7 × 73.7 mm
Soldermander panelized
polygnomial/adcs
CPU (RT1170) + RAM (MRAM - SEMC and xSPI) + power breakout board, with 2x 100-pin board to board connectors.
177 parts2
6 layers90.2 × 95.9 mm
PiCoral
polygnomial/adcs2CPU (RT1170) + RAM (MRAM - SEMC and xSPI) + power breakout board, with 2x 100-pin board to board connectors.
- Size
- 90.2 × 95.9 mm
- Copper layers
- 6
- Thickness
- 1.6 mm
- Parts
- 102
- Nets
- 301
- Pads
- 888
- Tracks, vias
- 1,732, 352
- Pours
- 23
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 2 Oct 2023
- Updated
- 8 Aug 2024
Overview
PiCoral is an open-source printed circuit board by polygnomial, from the polygnomial/adcs repository on GitHub. It is a 6-layer board of 90.2 × 95.9 mm with 102 parts on 301 nets, routed with 1,732 tracks and 352 vias.
It is built around the EP2W+, TPS7A4501DCQT and IRLML2803, with the NDS8434 among its other parts. Its parts include 32 resistors, 20 connectors, 17 ICs, 13 capacitors and 10 transistors.
Main components
4
EP2W+
VFQFN-32-EP-40℃~+85℃ 0.1dB 1.7deg 1.8dB 19.8dB 1mm 2 way 5mm 5mm 700MHz~6GHz VFQFN-32-EP RF Power Splitters / Combiners ROHSMini-CircuitsRF Power Splitters / Combiners
TPS7A4501DCQT
SOT-223-6-40℃~+125℃@(Tj) 1 1.21V~20V 1.5A 1mA 20V 300mV@(1.5A) 35uVrms 68dB@(1kHz) Adjustable Over Current Protection、Over Temperature Protection、Reverse connection protection Positive SOT-223-6 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
IRLML2803
SOT-231 N-channel 1.2A 15pF 1V 250mΩ@10V 3.3nC 30V 34pF 540mW 85pF N-Channel SOT-23 MOSFETs ROHSGuangdong HottechMOSFETs
NDS8434
SOIC-8-55℃~+150℃ 1 P-Channel 1.07nF 1V 2.33nF 20V 360pF 80nC@4.5V P-Channel SOIC-8 MOSFETs ROHSonsemiMOSFETs
README
README.mdADCS
Docs
- Power Architecture
- RT1170 and RT1060 pin map
- slides and other notes
- Tim's review
- TODO move other notes here
Hardware
Soldermander
CPU (RT1170) + RAM (MRAM - SEMC and xSPI) + power breakout board, with 2x 100-pin board to board connectors.
Sqrt of G
Eventual functional ADCS controller and sensor mainboard that the CPU board will sit on top of
PCBranch
Development breakout board that breaks out all the pins of the RT1170 CPU
Code
flight
Rust code with a Teensy target, RT1170 target (not yet implemented), etc.
cpp-code
Useful for checking that I implemented my Rust drivers correctly
Parts
102| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R12, R13, R14, R16, R17, R18, R19, R20, R21, R32 |
| 10 | NVT2010PW_118 | adcs:TSSOP24_SOT355-1_NXP-L | U3, U4, U5, U11, U12, U13, U14, U15, U16, U17 |
| 6 | 10K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R8, R22, R23, R26, R29 |
| 6 | 3.3k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R7, R10, R25, R28, R31 |
| 5 | 10nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C5, C13, C15, C17 |
| 5 | 4.7K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5, R9, R24, R27, R30 |
| 5 | 4.7uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C4, C6, C14, C16, C18 |
| 5 | IRLML2803 | mainboard:SOT-23 | Q1, Q4, Q6, Q8, Q10 |
| 5 | NDS8434 | mainboard:NDS8434 | Q2, Q5, Q7, Q9, Q11 |
| 4 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R6, R11 |
| 4 | 5055680431 | adcs:CON_5055680431 | J1, J2, J3, J11 |
| 4 | Conn_01x10 | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J24, J26, J29, J30 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H5, H6, H7, H8 |
| 3 | Amphenol_901-144 | Connector_Coaxial:SMA_Amphenol_901-144_Vertical | J8, J9, J13 |
| 3 | Conn_01x15 | Connector_PinHeader_2.54mm:PinHeader_1x15_P2.54mm_Vertical | J23, J25, J28 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2 |
| 2 | 1985807 | adcs:SCREWTERMINAL-3.5MM-2_LOCK | J6, J7 |
| 2 | 5055680631 | adcs:CON_5055680631 | J4, J12 |
| 2 | ~ | adcs:RM3100CB | U9, U10 |
| 1 | 0 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R15 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C10 |
| 1 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J27 |
| 1 | EP2W+ | mainboard:QFN32-5X5MM | U8 |
| 1 | Google Coral Micro | adcs:Coral | U2 |
| 1 | JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J5 |
| 1 | LORA1281F27 | adcs:LORA128XF27 | U6 |
| 1 | Orion B16 | mainboard:S1216_24PIN_PACKAGE | U7 |
| 1 | TPS7A4501DCQT | mainboard:TPS7A4501DCQT | U1 |
| 1 | TestPoint | TestPoint:TestPoint_Pad_2.0x2.0mm | TP1 |
The 97 most common of 102 parts.
Questions
How big is the PiCoral PCB?
It measures 90.2 × 95.9 mm and has 6 copper layers, 1.6 mm thick.
What parts does the PiCoral use?
102 parts, built around the EP2W+, TPS7A4501DCQT, IRLML2803 and NDS8434. 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 PiCoral KiCad files?
From the polygnomial/adcs repository on GitHub, at the commit this page was made from: the board is hardware/adcs_with_coral/PiCoral.kicad_pcb and its schematic hardware/adcs_with_coral/PiCoral.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PiCoral design in my own project?
Its repository states no licence, so its author keeps all rights: ask polygnomial before reusing the design.
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