4 layers300 × 270 mm
4 layers98.2 × 122 mm
Project Roll
kevleep/Project-RollProject Roll Project Roll is a spherical robot that achieves omni-directional movement using omni-wheels and a hamster ball drive mechanism.
- Size
- 98.2 × 122 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 75
- Nets
- 58
- Pads
- 227
- Tracks, vias
- 192, 414
- Pours
- 20
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 29 Jul 2026
- Updated
- 25 Aug 2026
Overview
Project Roll is an open-source printed circuit board by kevleep, from the kevleep/Project-Roll repository on GitHub. It is a 4-layer board of 98.2 × 122 mm with 75 parts on 58 nets, routed with 192 tracks and 414 vias.
It is built around the AP62300TWU, MIC5504-3.3YM5 and LTST-C193TBKT-5A, with the TB002-500-02BE, IRFS7430TRLPBF and SMAJ15A among its other parts. Its parts include 17 connectors, 13 capacitors, 13 resistors, 11 diodes and 9 fuses. It belongs with the ESP32 boards of this library.
Main components
7
AP62300TWU
TSOT-26-40℃~+125℃ 1 155uA 3A 4.2V~18V 750kHz 763mV~7V Adjustable Buck Buck Built-in Yes TSOT-26 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters
MIC5504-3.3YM5
SOT-23-5-40℃~+125℃@(Tj) 1 120uVrms 15uA 180mV@(300mA) 3.3V 300mA 5.5V 75dB@(1kHz) Fixed Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
LTST-C193TBKT-5A
0603-20℃~+80℃ 130° 15mcd 2.8V 465nm~475nm 468nm 5mA 76mW Blue Discrete Diode Water Clear 0603 LED Indication - Discrete ROHSLite-OnLED Indication - DiscreteTB002-500-02BE
插件插件 Screw Terminal Blocks ROHSCUIScrew Terminal Blocks
IRFS7430TRLPBF
D2PAK-55℃~+175℃ 0.97mΩ@10V 1 N-channel 1.46nF 14.24nF 2.2V 375W 40V 426A 460nC D2PAK MOSFETs ROHSInfineon TechnologiesMOSFETs
SMAJ15A
DO-214AC(SMA)-65℃~+150℃ 15V 16.4A@10/1000us 18.5V 1uA 24.4V 400W@10/1000us TVS Unidirectional DO-214AC(SMA) ESD and Surge Protection (TVS/ESD) ROHSMDDESD And Surge Protection (TVS/ESD)SMAJ15CA
DO-214AC(SMA)ESD And Surge Protection (TVS/ESD)hongjiacheng
README
README.mdProject Roll
Project Roll is a spherical robot that achieves omni-directional movement using omni-wheels and a hamster ball drive mechanism. The robot features a custom Smart Power Distribution Board made in KiCAD that centralizes power management and connections between sensors, motors, and ESP-32 MCU onto one board. The software written in C++ is currently a work in progress.OnShape CAD
Images
Parts
75| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | LTST-C193TBKT-5A | Diode_SMD:D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1, D4, D5, D6, D7, D8, D9, D10, D11 |
| 8 | 10A | BB8 Footprints:CONN_3557-2_KEY | F2, F3, F4, F5, F6, F7, F8, F9 |
| 8 | TB002-500-02BE | BB8 Footprints:CUI_TB002-500-02BE | J2, J3, J4, J5, J13, J14, J15, J16 |
| 5 | 1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7, C9, C10, C12, C13 |
| 5 | 2k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R5, R6, R8, R9 |
| 4 | Conn_01x04 | Connector_JST:JST_PH_B4B-PH-K_1x04_P2.00mm_Vertical | J8, J9, J10, J11 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad | H1, H2, H3, H4 |
| 3 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C8, C11 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R7 |
| 2 | 22uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5, C6 |
| 2 | 270 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R12, R13 |
| 2 | 620 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R10, R11 |
| 2 | Conn_01x05 | Connector_JST:JST_PH_B5B-PH-K_1x05_P2.00mm_Vertical | J6, J7 |
| 1 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1 |
| 1 | 10pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C4 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3 |
| 1 | 20A | BB8 Footprints:CONN_3557-2_KEY | F1 |
| 1 | 220uF | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C2 |
| 1 | 3.3uH | Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolder | L1 |
| 1 | 56.2k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 1 | AP62300TWU | Package_TO_SOT_SMD:TSOT-23-6 | U1 |
| 1 | Conn_01x02 | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J12 |
| 1 | Conn_01x03 | BB8 Footprints:Voltage Meter | J17 |
| 1 | ESP32-DEVKIT-V1 | BB8 Footprints:MODULE_ESP32_DEVKIT_V1 | U3 |
| 1 | GY-521 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | U2 |
| 1 | IRFS7430TRLPBF | Package_TO_SOT_SMD:TO-263-2 | Q1 |
| 1 | LOGO | BB8 Footprints:Project_Roll | G*** |
| 1 | LOGO | BB8 Footprints:asher | G*** |
| 1 | MIC5504-3.3YM5 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | SMAJ15A | Diode_SMD:D_SMA | D3 |
| 1 | SMAJ15CA | Diode_SMD:D_SMA | D2 |
| 1 | TB002-500-02BE | Connector_AMASS:AMASS_XT30UPB-F_1x02_P5.0mm_Vertical | J1 |
Questions
How big is the Project Roll PCB?
It measures 98.2 × 122 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Project Roll use?
75 parts, built around the AP62300TWU, MIC5504-3.3YM5, LTST-C193TBKT-5A and TB002-500-02BE. 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 Project Roll KiCad files?
From the kevleep/Project-Roll repository on GitHub, at the commit this page was made from: the board is Project_Roll.kicad_pcb and its schematic Project_Roll.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Project Roll design in my own project?
Its repository states no licence, so its author keeps all rights: ask kevleep before reusing the design.
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