4 layers54 × 120 mm
Kartonaut
Jan-Philipp-Munsch/kartonaut
TVC model rocket (after BPS.space Scout F): Teensy 4.1 flight firmware, mainboard spec, project log
174 partsMIT
2 layers46.5 × 78.5 mm
Shaun proj
SFBdragon/eee3088f-projectCollaborative repo for the UCT EEE3088F Project of team 69.
- Size
- 46.5 × 78.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 99
- Nets
- 93
- Pads
- 377
- Tracks, vias
- 761, 38
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Mar 2025
- Updated
- 15 May 2025
Overview
Shaun proj is an open-source printed circuit board by SFBdragon, from the SFBdragon/eee3088f-project repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 46.5 × 78.5 mm with 99 parts on 93 nets, routed with 761 tracks and 38 vias.
It is built around the DRV8833PWPR, TPS63020DSJR and CH224K, with the TPS5430DDA, TP4056-42-ESOP8 and AO3400A among its other parts. Its parts include 36 resistors, 19 capacitors, 8 ICs, 6 transistors and 4 diodes.
Main components
8
DRV8833PWPR
TSSOP-16-EP-40℃~+85℃ 1.5A 2 2.7V~10.8V 360mΩ Bipolar Driver Yes TSSOP-16-EP Stepper Motor Driver ROHSTexas InstrumentsStepper Motor Driver
TPS63020DSJR
VSON-14-EP(3x4)-40℃~+85℃@(TA) 1 1.2V~5.5V 1.8V~5.5V 2.4MHz 3A 50uA Adjustable Buck-Boost Buck-Boost Built-in Yes VSON-14-EP(3x4) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
CH224K
ESSOP-10-150mil-1mm-40℃~+90℃ 100W 4V~30V 5V、9V、12V、15V、20V Overvoltage Protection、Thermal Protection PD 3.0 Power Receiver Controller ESSOP-10-150mil-1mm USB PD ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
TPS5430DDA
ESOP-8-40℃~+125℃@(TJ) 1 1.221V~32.04V 3A 4.4mA 5.5V~36V 500kHz Adjustable Buck Buck Built-in No ESOP-8 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
TP4056-42-ESOP8
ESOP-8-40℃~+85℃ 1 1A 2uA 4.2V 4V~8V Charging IC Lithium Battery Support ESOP-8 Battery Management ROHSTOPPOWERBattery Management
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsAO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
README.mdEEE3088F Project
Power board for a micro-mouse designed for EEE3088F Engineering Design Principles @ UCT
Authors
Team #69
- Shaun Beautement
- Adedamola Yusuff
Project Description
The board aims to meet the following requirements:
- Operate up to 4 motors bidirectionally
- Controls 2x brushed DC motors which could each draw 200mA @ 4.2V
- Controls 2x motors at 500mA each.
- Monitor the battery using an INA219
- Charge the battery from USB supply
- Two charging modes the battery: IBAT = 200mA, or 600mA ±100mA
- Integrate USB C and get 9V out of the USB Host
- Provide 2x high-side external load switching with 5V regulated supply, drawing at most 1A each
- Provide a 3V3 5% accuracy (300mA max) and 5V Out 5% accuracy (1.5A max)
- Provide an ON/OFF switch.
- OFF state: battery draw <30uA.
- ON state: can provide your robot peak current of 2A.
The board is designed to be printable with PCBA for most components for under $70 with JLCPCB. As-is, the design costs about $50, not including the JST and 2x16 connector, which was provided to us.
The board is shaped to fit to and interface with
- Justin Pead's micro-mouse (2025 version)
- a 1s1p LiPo battery
- a USB C cable (USB v2 and v3 should work) for charging
Software
The schematic and PCB design is drafted in KiCAD, with metadata included for JLCPCB using KiCAD JLCPCB Tools.
Some prototype simulations in LTspice are included in ltspice/.
Some working notes are included under notes/ and can be viewed in Obsidian. But are best unseen.
Usage Warning
It is not recommended to use this design as-is, as the board is incapable of delivering regulated supply voltages and driving motors.
With this design:
- There was a short from the buck-boosts' (TPS63020) VIN pins to GND, seemingly through the IC (without having powered the board). The cause is unclear at time of writing.
- The motor drivers were not operational. The cause is unclear at time of writing, and may have been a defieciency in the testing methodology.
- There are some capacitors with incorrect footprints.
- The USB C port is too far back on the board.
These have not been corrected for at time of writing, largely to preserve the state of the design for project submission.
License
CERN Open Hardware Licence Version 2 - Permissive
See LICENSE.md
Parts
99| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP1, TP2, TP7, TP8, TP10, TP11, TP14 |
| 6 | 1 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R16, R29, R32, R33, R36 |
| 6 | 100m | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R9, R19, R26, R28, R31, R35 |
| 6 | 1M | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R5, R18, R23, R25, R34 |
| 5 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1, JP2, JP3, JP4, JP5 |
| 4 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R6, R10, R11 |
| 4 | 22µF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6, C15, C16, C18 |
| 4 | 3.3k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R12, R13, R20, R21 |
| 3 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R14, R15, R17 |
| 3 | 1µH | Inductor_SMD:L_1008_2520Metric_Pad1.43x2.20mm_HandSolder | L4, L5, L6 |
| 3 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q2, Q4, Q5 |
| 3 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1, Q3, Q6 |
| 2 | 0.01µF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C4, C8 |
| 2 | 0.1µF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C14, C22 |
| 2 | 10u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C5 |
| 2 | 180k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R24, R30 |
| 2 | 2.2µF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C17 |
| 2 | 220µF | Capacitor_SMD:CP_Elec_6.3x7.7 | C13, C20 |
| 2 | DRV8833PWPR | Package_SO:HTSSOP-16-1EP_4.4x5mm_P0.65mm_EP3.4x5mm_Mask2.46x2.31mm_ThermalVias | U4, U7 |
| 2 | TPS63020DSJR | MyLibrary:DAMOLA_VSON-14-1EP_3.4x4.4mm_P0.5mm_EP1.6x4.2mm | U6, U8 |
| 1 | 1.5M | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R22 |
| 1 | 100n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C10 |
| 1 | 10n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C9 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C11 |
| 1 | 120k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R27 |
| 1 | 1u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1 |
| 1 | 220u | Capacitor_SMD:CP_Elec_6.3x7.7 | C12 |
| 1 | 22u | Inductor_SMD:L_SXN_SMDRI125 | L3 |
| 1 | 2k | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 3.9k | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 6.8K | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | CH224K | Package_SO:SSOP-10-1EP_3.9x4.9mm_P1mm_EP2.1x3.3mm_ThermalVias | U1 |
| 1 | Conn_01x02_Socket | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J3 |
| 1 | Conn_02x16_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x16_P2.54mm_Vertical | J2 |
| 1 | GREEN LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | INA219AxD | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D4 |
| 1 | LOGO | MyLibrary:PommeDarker | G*** |
| 1 | LOGO | MyLibrary:UCT_LOGO | G*** |
| 1 | LOGO | MyLibrary:Olympia | G*** |
| 1 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1 |
| 1 | RED LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1 |
| 1 | SS14 | Diode_SMD:D_SMA | D5 |
| 1 | SW_SPDT | MyLibrary:SS-12D11G3R | SW2 |
| 1 | TP4056-42-ESOP8 | Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm_ThermalVias | U5 |
| 1 | TPS5430DDA | Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.514x3.2mm | U2 |
| 1 | USB_C_Receptacle_USB2.0_16P | MyLibrary:USB_C_Receptacle_G-Switch_GT-USB-7010ASV_MOD | J1 |
The 97 most common of 99 parts.
Questions
How big is the Shaun proj PCB?
It measures 46.5 × 78.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Shaun proj use?
99 parts, built around the DRV8833PWPR, TPS63020DSJR, CH224K and TPS5430DDA. 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 Shaun proj KiCad files?
From the SFBdragon/eee3088f-project repository on GitHub, at the commit this page was made from: the board is kicad/shaun-proj/shaun-proj.kicad_pcb and its schematic kicad/damola-proj/damola-proj.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Shaun proj design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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