4 layers35 × 50 mm
4 layers16 × 44 mm
Pilkbrain
cr1tbit/pilkbrain1The schematic is still a bit messy, just for the reference for now.
- Size
- 16 × 44 mm
- Copper layers
- 4
- Thickness
- 1.01 mm
- Parts
- 106
- Nets
- 83
- Pads
- 342
- Tracks, vias
- 1,207, 165
- Pours
- 259
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 3 Oct 2024
- Updated
- 6 Jun 2026
Overview
Pilkbrain is an open-source printed circuit board by cr1tbit, from the cr1tbit/pilkbrain repository on GitHub. It is a 4-layer board of 16 × 44 mm with 106 parts on 83 nets, routed with 1,207 tracks and 165 vias.
It is built around the ESP32-S3, TF-123-ARP9H17 and BQ24073RGTR, with the SSP7615-33DFR, USBLC6-2P6 and GT-USB-7055E among its other parts. Its parts include 28 resistors, 27 capacitors, 10 ICs, 3 inductors and 2 crystals. It belongs with the ESP32 boards of this library.
Main components
8
ESP32-S3
QFN-56-EP(7x7)-40℃~+105℃ -98.4dBm 150Mbps 2.412GHz~2.484GHz 2.4GHz 21dBm 340mA 3V~3.6V 88mA SPI、USB、UART、ADC、I2C、I2S、PWM WiFi transceiver QFN-56-EP(7x7) RF Transceiver ICs ROHSEspressif SystemsRF Transceiver ICs
TF-123-ARP9H17
SMD-25℃~+85℃ 1.7mm Connector and Ejector MicroSD Card (TF Card) Push-Pull SMD SD Card / Memory Card Connector ROHSXUNPUSD Card / Memory Card Connector
BQ24073RGTR
QFN-16-EP(3x3)-40℃~+125℃ 1.5A 4.2V 4.35V~6.4V 50uA Charging IC Lithium Battery Not supported Support QFN-16-EP(3x3) Battery Management ROHSTexas InstrumentsBattery Management
SSP7615-33DFR
DFN-4(1x1)-40℃~+125℃@(Tj) 1 3.3V 400mA 400mV@(200mA) 450nA 60dB@(1kHz) 8V Fixed Over Current Protection、Enable、Short Circuit Protection Positive DFN-4(1x1) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSShanghai Siproin MicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
USBLC6-2P6
SOT-666-6-40℃~+125℃ 150nA 17V 2 3.5pF 5.25V 5A@8/20us 6V ESD IEC 61000-4-2 Unidirectional SOT-666-6 ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)
GT-USB-7055E
SMD-40℃~+85℃ 1 10,000 Cycles 16P 24V 5.7mm 5A Black Female Surface Mount,Vertical Type-C USB 2.0 SMD USB Connectors ROHSG-SwitchUSB Connectors
MLT-5020
SMD,5x5mm-20℃~+70℃ 100mA 2.5mm 2V~4V 3V 4kHz 5.2mm 5.2mm 75dB Electromagnetic Passive (Externally Driven) SMD,5x5mm Buzzers ROHSJiangsu Huaneng ElecBuzzers
TS24CA
SMD,4.6x1.8mm-20℃~+70℃ 1.6N 1.9mm 12V 20 thousand cycles 3.5mm 4.7mm 50mA Black No Rectangular Button SMD(SMT) Tab SPST Surface Mount, Right Angle Without Bracket SMD,4.6x1.8mm Tactile Switches ROHSSHOU HANTactile Switches
README
README.mdpilkbrain
The schematic is still a bit messy, just for the reference for now.
Parts
106| Qty | Value | Footprint | References |
|---|---|---|---|
| 28 | PAD | Critbit_lib:diy_castellate_2.00_simple | PAD1, PAD2, PAD10, PAD11, PAD12, PAD13, PAD14, PAD15, PAD16, PAD17, PAD18, PAD19, PAD20, PAD21, PAD22, PAD23 +12 |
| 16 | 10k | Resistor_SMD:R_0402_1005Metric | R2, R3, R5, R7, R8, R9, R11, R15, R17, R20, R21, R22, R23, R24, R25, R28 |
| 12 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C4, C16, C17, C18, C19, C20, C23, C24, C30, C33 |
| 5 | 2k | Resistor_SMD:R_0402_1005Metric | R1, R4, R13, R14, R27 |
| 4 | 10u | Capacitor_SMD:C_0402_1005Metric | C3, C9, C13, C22 |
| 4 | 12p | Capacitor_SMD:C_0402_1005Metric | C5, C6, C7, C8 |
| 4 | 1u | Capacitor_SMD:C_0402_1005Metric | C10, C12, C21, C29 |
| 3 | 47k | Resistor_SMD:R_0402_1005Metric | R10, R18, R26 |
| 3 | XL-1005UWC_C20613596 | easyeda2kicad:LED0402-RD_YELLOW | U2, U5, U6 |
| 2 | 100k | Resistor_SMD:R_0402_1005Metric | R16, R19 |
| 2 | 2nH/500mA | Inductor_SMD:L_0402_1005Metric | L1, L2 |
| 2 | 3.3p | Capacitor_SMD:C_0402_1005Metric | C34, C35 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R6, R12 |
| 1 | 1.25T-2PWT | easyeda2kicad:CONN-SMD_P1.25-H_1.25T-2PWT | P1 |
| 1 | 22uF/0603 | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 24nH | Inductor_SMD:L_0402_1005Metric | L3 |
| 1 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q5 |
| 1 | AP2552FDC-7 | easyeda2kicad:WDFN-6_L2.0-W2.0-P0.65-BL-EP-1 | U7 |
| 1 | Antenna_Chip | RF_Antenna:Johanson_2450AT18x100 | AE1 |
| 1 | BQ24073RGT | Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm_ThermalVias | U4 |
| 1 | ESP32-S3 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP5.6x5.6mm | U13 |
| 1 | GT-USB-7055E | easyeda2kicad:USB-C-SMD_GT-USB-7055E | USB1 |
| 1 | LIPO+ | TestPoint:TestPoint_Pad_D1.5mm | TP1 |
| 1 | LSM6DSVETR | easyeda2kicad:LGA-14_L3.0-W2.5-P0.50-TL | U1 |
| 1 | MLT-5020 | easyeda2kicad:BUZ-SMD_L5.0-W5.5-P4.60 | BUZZER3 |
| 1 | SSP7615-33DFR | easyeda2kicad:DFN-4_L1.0-W1.0-P0.65-BL-EP | U9 |
| 1 | TF-123-ARP9H17 | easyeda2kicad:TF-SMD_TF-123-ARP9H15 | U11 |
| 1 | TP | TestPoint:TestPoint_Pad_D1.0mm | TP7 |
| 1 | TS24CA | easyeda2kicad:SW-SMD_TS24CA | SW1 |
| 1 | USBLC6-2P6 | Package_TO_SOT_SMD:SOT-666 | U8 |
| 1 | XO-32K | Crystal:Crystal_SMD_2012-2Pin_2.0x1.2mm | Y2 |
| 1 | XO-40M | Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm | Y1 |
Questions
How big is the Pilkbrain PCB?
It measures 16 × 44 mm and has 4 copper layers, 1.01 mm thick.
What parts does the Pilkbrain use?
106 parts, built around the ESP32-S3, TF-123-ARP9H17, BQ24073RGTR and SSP7615-33DFR. 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 Pilkbrain KiCad files?
From the cr1tbit/pilkbrain repository on GitHub, at the commit this page was made from: the board is pilkbrain.kicad_pcb and its schematic pilkbrain.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pilkbrain design in my own project?
Its repository states no licence, so its author keeps all rights: ask cr1tbit before reusing the design.
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