4 layers69 × 99 mm
4 layers69 × 99 mm
Robot board
Tim4769/Red-Robot-Hackathon-2026- Size
- 69 × 99 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 127
- Nets
- 123
- Pads
- 469
- Tracks, vias
- 1,050, 180
- Pours
- 379
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Nov 2026
- Updated
- 7 Nov 2026
Overview
Robot board is an open-source printed circuit board by Tim4769, from the Tim4769/Red-Robot-Hackathon-2026 repository on GitHub. It is a 4-layer board of 69 × 99 mm with 127 parts on 123 nets, routed with 1,050 tracks and 180 vias.
It is built around the 74AHCT125D, ESP32-S3-WROOM-1-N8 and DRV8835DSS, with the MAX7219M, TVS1400DRV and XL-SA3391SRWC among its other parts. Its parts include 36 capacitors, 34 resistors, 11 connectors, 10 ICs and 7 diodes. It belongs with the robots and motor control boards and the ESP32 boards of this library.
Main components
7
74AHCT125D
SOP-14-40℃~+125℃ 1 4 4.3ns@5V,50pF 4.5V~5.5V 40uA 74AHCT 8mA 8mA Schmitt trigger Tri-State Unidirectional SOP-14 Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffer/Driver/Transceiver
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
DRV8835DSS
WSON-12-EP(2x3)-40℃~+150℃ 1.5A 2 2V~7V 305mΩ 95nA Yes WSON-12-EP(2x3) Brushed DC Motor Drivers ROHSTexas InstrumentsStepper Motor Driver
MAX7219M
SOP-24-300mil10MHz 150uA 3-Wire Serial Interface 30mA 320mA 4V~5.5V 8 Segment x 8 Digit Built-in display RAM、PWM dimming、BCD input latch function、Power-up display blanking、Lamp test function、Cascadable function SOP-24-300mil Digital Tube Drivers ROHSHGSEMIDigital Tube Drivers
TVS1400DRV
WSON-6-EP(2x2)-40℃~+125℃ 120pF 14V 16.9V 19.3V 2.2nA 43A@8/20us 80W@8/20us IEC 61000-4-2、IEC 61000-4-5 TVS Unidirectional WSON-6-EP(2x2) ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)
XL-SA3391SRWC
SMD-30℃~+70℃ 0.39 100mcd 15mm 29.4mm 3 3.7mm 7 Segment Common Cathode Red SMD LED Segment Displays ROHSXINGLIGHTLED Segment Displays
BSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
Parts
127| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C5, C6, C7, C8, C19, C20, C21, C22, C23, C24, C25, C28, C29, C34, C36 |
| 8 | 4.7k | Resistor_SMD:R_0402_1005Metric | R8, R9, R10, R11, R12, R13, R14, R15 |
| 6 | 22uF | Capacitor_SMD:C_0402_1005Metric | C16, C17, C26, C27, C30, C33 |
| 5 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C18 |
| 5 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5 |
| 5 | LOGO | LOGO | G***, G***, G***, G***, G*** |
| 4 | 1x2_Screw | footprints:CONN2_2060-452&slash_998-404_WAG | J8, J9, J10, J11 |
| 4 | 5.1R | Resistor_SMD:R_0402_1005Metric | R19, R20, R24, R29 |
| 4 | 5.1k | Resistor_SMD:R_0402_1005Metric | R1, R17, R18, R44 |
| 4 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical_SMD_Pin1Right | J4, J5, J6, J7 |
| 3 | 100k | Resistor_SMD:R_0603_1608Metric | R2, R4, R27 |
| 3 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3 |
| 3 | NetTie_2 | NetTie:NetTie-2_SMD_Pad0.5mm | NT1, NT2, NT3 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric | C15, C35 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R6, R7 |
| 2 | 22R | Resistor_SMD:R_0402_1005Metric | R42, R43 |
| 2 | 33pF | Capacitor_SMD:C_0402_1005Metric | C9, C10 |
| 2 | 33uF | Capacitor_SMD:C_1206_3216Metric | C12, C14 |
| 2 | 4.7uH | Inductor_SMD:L_Bourns_SRP7028A_7.3x6.6mm | L1, L3 |
| 2 | 47uF | Capacitor_SMD:C_0603_1608Metric | C11, C13 |
| 2 | DRV8835 | Package_SON:WSON-12-1EP_3x2mm_P0.5mm_EP1x2.65 | U6, U7 |
| 2 | D_Small | Diode_SMD:D_SOD-123 | D1, D10 |
| 2 | LMR51450 | Package_SON:WSON-12-1EP_3x3mm_P0.5mm_EP1.5x2.5mm | U2, U3 |
| 2 | SW_SPST | footprints:SW_Push_SPST_TS-1088 | SW1, SW2 |
| 1 | 100pF | Capacitor_SMD:C_0402_1005Metric | C31 |
| 1 | 11.3k | Resistor_SMD:R_0402_1005Metric | R33 |
| 1 | 15k | Resistor_SMD:R_0603_1608Metric | R30 |
| 1 | 180R | Resistor_SMD:R_0402_1005Metric | R16 |
| 1 | 19.1k | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R26 |
| 1 | 31.6k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 33k | Resistor_SMD:R_0402_1005Metric | R21 |
| 1 | 4.7nF | Capacitor_SMD:C_0402_1005Metric | C32 |
| 1 | 49.9k | Resistor_SMD:R_0603_1608Metric | R25 |
| 1 | 5.6uH | Inductor_SMD:L_Bourns_SRP7028A_7.3x6.6mm | L2 |
| 1 | 54.9k | Resistor_SMD:R_0402_1005Metric | R32 |
| 1 | 6mR | Resistor_SMD:R_0805_2012Metric | R31 |
| 1 | 74AHCT125 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U9 |
| 1 | 82R | Resistor_SMD:R_0402_1005Metric | R22 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_CLIFF_FC681465S_SMT_Horizontal | J2 |
| 1 | Buzzer | Buzzer_Beeper:MLT-7525 | BZ1 |
| 1 | CLK | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP6 |
| 1 | Conn_01x09_Pin | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical_SMD_Pin1Left | J1 |
| 1 | D2 | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP4 |
| 1 | ESP32-S3-WROOM-1 | RF_Module:ESP32-S3-WROOM-1 | U1 |
| 1 | LBAT | LED_SMD:LED_1206_3216Metric | D2 |
| 1 | LOGO | footprints:bnyahaj 2x2 negative | G*** |
| 1 | MAX7219 | Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm | U10 |
| 1 | PWR | LED_SMD:LED_1206_3216Metric | D5 |
| 1 | Polyfuse | Fuse:Fuse_Bourns_MF-SM_7.98x5.44mm | F1 |
| 1 | RLED | LED_SMD:LED_1206_3216Metric | D3 |
| 1 | RXLED | LED_SMD:LED_1206_3216Metric | D9 |
| 1 | SDI | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP5 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP1 |
| 1 | TPS552892 | footprints:VQFN21_RYQ_TEX | U5 |
| 1 | TVS1400DRV | Package_SON:WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm | U4 |
| 1 | TXLED | LED_SMD:LED_1206_3216Metric | D7 |
| 1 | USB_C_Receptacle_USB2.0_14P | footprints:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J3 |
| 1 | XL-SA3391SRWC | Display_7Segment:XL-SA3391SRWC | U8 |
The 126 most common of 127 parts.
Questions
How big is the Robot board PCB?
It measures 69 × 99 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Robot board use?
127 parts, built around the 74AHCT125D, ESP32-S3-WROOM-1-N8, DRV8835DSS and MAX7219M. 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 Robot board KiCad files?
From the Tim4769/Red-Robot-Hackathon-2026 repository on GitHub, at the commit this page was made from: the board is hardware/robot-board/robot-board.kicad_pcb and its schematic hardware/7segdisplay/7segdisplay.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Robot board design in my own project?
Its repository states no licence, so its author keeps all rights: ask Tim4769 before reusing the design.
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