2 layers122.5 × 70.5 mm
Main pcb
Potato-eater/Legacy2026
github repo for Robocup Junior Australia lightweight soccer team
74 parts2
2 layers134.4 × 99.6 mm
Line sensor
Potato-eater/Legacy20262github repo for Robocup Junior Australia lightweight soccer team
- Size
- 134.4 × 99.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 79
- Nets
- 62
- Pads
- 320
- Tracks, vias
- 557, 70
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 3 Apr 2026
- Updated
- 3 Oct 2026
Overview
Line sensor is an open-source printed circuit board by Potato-eater, from the Potato-eater/Legacy2026 repository on GitHub. It is a 2-layer board of 134.4 × 99.6 mm with 79 parts on 62 nets, routed with 557 tracks and 70 vias.
It is built around the ESP32-S2-MINI-2-N4, AMS1117 and TCRT5000, with the LESD5D5.0CT1G among its other parts. Its parts include 37 resistors, 9 capacitors, 6 diodes, 3 connectors and 2 ICs. It belongs with the sensors and measurement boards and the ESP32 boards of this library.
Main components
4
ESP32-S2-MINI-2-N4
SMD-40℃~+105℃ -97dBm 19.5dBm 2.4GHz 310mA 3V~3.6V 63mA ESP32-S2FH4 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD WiFi Modules ROHSEspressif SystemsWiFi Modules
AMS1117
1.0 A Low-Dropout Fixed RegulatorAdvanced Monolithic SystemsUncategorised
TCRT5000
DIP-4-25℃~+85℃ 0.4V 1.25V 100mA 15mm 70V 950nm Phototransistor DIP-4 Reflective Optical Interrupters ROHSVishay IntertechnologyReflective Optical Interrupters
LESD5D5.0CT1G
SOD-523-55℃~+150℃ 100W 12pF 16V 1uA 5V 7A 7V Bidirectional ESD IEC 61000-4-2 SOD-523 ESD and Surge Protection (TVS/ESD) ROHSGOODWORKUncategorised
README
README.mdLegacy2026
github repo for Robocup Junior Australia lightweight soccer team
poster for state competition: https://canva.link/pb0ula68jbszzvj
All programs are annotated within their own files.
Parts
79| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 220R | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R9, R10, R11, R12, R17, R18, R19, R20, R25, R26, R27, R28 |
| 16 | 4K7 | Resistor_SMD:R_0603_1608Metric | R5, R6, R7, R8, R13, R14, R15, R16, R21, R22, R23, R24, R29, R30, R31, R32 |
| 16 | TCRT5000 | TCRT5000:TCRT5000 | T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16 |
| 6 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C4, C5, C6, C8 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_Pad | H1, H2, H3, H4 |
| 3 | 10K | Resistor_SMD:R_0603_1608Metric | R33, R34, R35 |
| 3 | 10uF | Capacitor_SMD:C_0603_1608Metric | C3, C7, C9 |
| 3 | LESD5D5.0CT1G | diode_extended:TVS_LESD5D5.0CT1G | D3, D4, D5 |
| 1 | 1N5819 | Diode_SMD:D_SOD-123 | D6 |
| 1 | 43R | Resistor_SMD:R_0603_1608Metric | R36 |
| 1 | 82R | Capacitor_SMD:C_0603_1608Metric | R37 |
| 1 | AMS1117 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | BOOT | Button_Switch_SMD:SW_SPST_PTS810 | SW2 |
| 1 | Comm. | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J2 |
| 1 | ESP32-S2-MINI-2 | ESP:XCVR_ESP32-S2-MINI-2 | U1 |
| 1 | EXT LED | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | I2C | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J3 |
| 1 | POWER LED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | RESET | Button_Switch_SMD:SW_SPST_PTS810 | SW1 |
| 1 | USB_B_Micro | JLCPCB:C10418 | J1 |
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github repo for Robocup Junior Australia lightweight soccer team
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Questions
How big is the Line sensor PCB?
It measures 134.4 × 99.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Line sensor use?
79 parts, built around the ESP32-S2-MINI-2-N4, AMS1117, TCRT5000 and LESD5D5.0CT1G. 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 Line sensor KiCad files?
From the Potato-eater/Legacy2026 repository on GitHub, at the commit this page was made from: the board is pcbs/line_sensor/line_sensor.kicad_pcb and its schematic pcbs/control_board/control_board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Line sensor design in my own project?
Its repository states no licence, so its author keeps all rights: ask Potato-eater before reusing the design.