2 layers7.5 × 5.7 mm
BackupProjects mgohren personal 1 20251228
maxgohren/ESPip-Boy
A smart watch based on the ESP32
2 parts2
4 layers35 × 45 mm
Espip boy rev2
maxgohren/ESPip-Boy2A smart watch based on the ESP32
- Size
- 35 × 45 mm
- Copper layers
- 4
- Thickness
- 0.8 mm
- Parts
- 111
- Nets
- 132
- Pads
- 484
- Tracks, vias
- 946, 123
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Jul 2025
- Updated
- 11 Apr 2026
Overview
Espip boy rev2 is an open-source printed circuit board by maxgohren, from the maxgohren/ESPip-Boy repository on GitHub. It is a 4-layer board of 35 × 45 mm with 111 parts on 132 nets, routed with 946 tracks and 123 vias.
It is built around the CP2102N-A02-GQFN28R, LTR-390UV-01 and MAX98357AETE+T, with the BMI270, BQ24074RGTR and BQ27421YZFR-G1A among its other parts. Its parts include 41 resistors, 31 capacitors, 16 ICs, 5 diodes and 5 transistors. It belongs with the ESP32 boards of this library.
Main components
12
CP2102N-A02-GQFN28R
QFN-28-EP(5x5)-40℃~+85℃@(Ta) 1.3uA 3V~3.6V 9.5mA USB 2.0 USB to UART QFN-28-EP(5x5) USB Converters ROHSSilicon LabsUSB Converters
LTR-390UV-01
SMD-6P,2x2mm-40℃~+85℃ 1.7V~3.6V 157klx 18bit 1uA 2mm 2mm I2C Light Intensity Low power/sleep mode、Spectral correction/filtering、Adjustable gain control、Interrupt/event trigger、Built-in temperature compensation SMD-6P,2x2mm Ambient Light Sensors ROHSLite-OnAmbient Light Sensors
MAX98357AETE+T
TQFN-16-EP(3x3)-40℃~+85℃ 2.4mA 2.5V~5.5V 3.2Wx1@4Ω 77dB 92% Automatic mute/no-noise switch、Enable/shutdown function、Filterless architecture Class D TQFN-16-EP(3x3) Audio Amplifiers ROHSMaxim Integrated (Analog Devices)Audio Amplifiers
BMI270
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 16bit 2KB 3.5uA Accelerometer Gyroscope SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps LGA-14(2.5x3) Accelerometers ROHSBosch SensortecAccelerometers
BQ24074RGTR
QFN-16-EP(3x3)-40℃~+125℃ 1 1.5A 4.2V 4.35V~10.2V 6.5uA Charging IC Lithium Battery Not supported Support QFN-16-EP(3x3) Battery Management ROHSTexas InstrumentsBattery Management
BQ27421YZFR-G1A
DSBGA-9-40℃~+85℃ 1 2.45V~4.5V 93uA I2C Lithium Battery Monitoring IC Support DSBGA-9 Battery Management ROHSTexas InstrumentsBattery Management
GT-USB-7010ASV
SMD-40℃~+85℃ 1 1.68mm 10,000 Cycles 16P 24V 3A 7.35mm Black Female Surface Mount, Right Angle Type-C USB 2.0 SMD USB Connectors ROHSG-SwitchUSB Connectors
ME6206B18XG
SOT-23-40℃~+85℃@(Ta) 1 1.8V 250mA 310mV@(100mA) 5.5V 70dB@(100Hz) 7uA Fixed Over Current Protection、Short Circuit Protection Positive SOT-23 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMICRONEVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
ME6217A33PG
SOT-89-3-40℃~+85℃ 1 100mV@(300mA) 100uA 3.3V 6.5V 65dB@(1kHz) 800mA Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown、Enable control Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMICRONEUncategorisedSS8050/Y1
SOT-23-55℃~+150℃ 1 NPN 1.5A 100MHz 200mV 25V 300mW 400 50uA 6V NPN SOT-23 Bipolar (BJT) ROHSMOTBipolar (BJT)
DMG1012T-7
SOT-523-55℃~+150℃ 1 N-channel 150mW 20V 500mA 700mΩ@4.5V 750pC 900mV N-Channel ±6V SOT-523 MOSFETs ROHSKUUMOSFETs
TZ-P2-0402YGTIA1-0.45T
0402-40℃~+80℃ 1.8V~2.4V 120° 20mA 40mcd 570nm~575nm 573nm 60mW Discrete Diode Water Clear Yellow Green 0402 LED Indication - Discrete ROHSTUOZHANLED Indication - Discrete
README
README.mdESPip-Boy
A smart watch based on the ESP32
Features
- ESP32 MCU with full Bluetooth Classic
- SD Card storage
- TFT RGB Display
- Flashlight
- Microphone
- Sensors
- Heart Rate & Blood Oxygen
- Light Sensor (Auto Display Brightness)
- Accelerometer (Auto Wakeup, Gestures)
- Magnetometer (Compass)
- Controlled with Push-Button Rotary Encoder
Planned Applications
- Compass
- Pedometer
- Map/Photo Display
- Clock
- Heart Rate Monitor
- Music Playback
- Bluetooth Manager
- System Monitor (CPU Tasks, SD Storage, RAM Usage etc.)
Powered by a LiPo, charged and programmed over USB
V1.0 PCB Complete
Parts
111| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | 10kΩ | Resistor_SMD:R_0402_1005Metric | R3, R4, R11, R16, R17, R19, R21, R22, R23, R24, R27, R29, R39, R40, R41, R45 +1 |
| 15 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C5, C9, C10, C11, C12, C14, C15, C16, C17, C23, C27 |
| 6 | 0Ω | Resistor_SMD:R_0402_1005Metric | R1, R2, R18, R20, R32, R38 |
| 5 | 10uF | Capacitor_SMD:C_0402_1005Metric | C7, C19, C21, C22, C29 |
| 5 | 1kΩ | Resistor_SMD:R_0402_1005Metric | R9, R10, R26, R33, R46 |
| 5 | 2.2uF | Capacitor_SMD:C_0402_1005Metric | C13, C20, C25, C30, C32 |
| 4 | 100kΩ | Resistor_SMD:R_0402_1005Metric | R15, R28, R31, R35 |
| 4 | 2.2kΩ | Resistor_SMD:R_0402_1005Metric | R13, R14, R36, R37 |
| 4 | HEADER 2X1P | espip_boy_rev2:HEADER 2X1P | H1, H2, H3, H4 |
| 3 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C6, C18, C26 |
| 3 | LESD5D5.0CT1G_C5199850 | Diode_SMD:D_SOD-523 | D1, D2, D4 |
| 3 | SS8050/Y1 | Package_TO_SOT_SMD:TSOT-23 | Q1, Q2, Q5 |
| 2 | 5.1kΩ | Resistor_SMD:R_0402_1005Metric | R5, R12 |
| 2 | DMG1012T-7 | Package_TO_SOT_SMD:SOT-523 | Q3, Q4 |
| 2 | JMP-2-NO | espip_boy_rev2:JMP-2-NO | JMP1, JMP2 |
| 2 | TS24CA 250GF 013 | easyeda2kicad:SW-SMD_L4.7-W3.5-P3.35-EH | SW1, SW4 |
| 1 | 0402 Blue | LED_SMD:LED_0402_1005Metric | U3 |
| 1 | 10Ω | Resistor_SMD:R_0402_1005Metric | R30 |
| 1 | 1N4148WS T4 | espip_boy_rev2:SOD-323_L1.8-W1.3-LS2.5-RD | D3 |
| 1 | 1X4 | espip_boy_rev2:1X4-SMT | CN1 |
| 1 | 200_mah_lipo | espip_boy_rev2:200_MAH_BATT | U15 |
| 1 | 22.1kΩ | Resistor_SMD:R_0402_1005Metric | R7 |
| 1 | 220nF | Capacitor_SMD:C_0402_1005Metric | C28 |
| 1 | 22uF | Capacitor_SMD:C_0805_2012Metric | C8 |
| 1 | 47.5kΩ | Resistor_SMD:R_0402_1005Metric | R8 |
| 1 | 470nF | Capacitor_SMD:C_0402_1005Metric | C24 |
| 1 | A | easyeda2kicad:SW-SMD_L4.7-W3.5-P3.35-EH | A1 |
| 1 | BMI270 | easyeda2kicad:LGA-14_L3.0-W2.5-P0.50-BR | U5 |
| 1 | BQ24074RGTR | easyeda2kicad:TQFN-16_L3.0-W3.0-P0.50-BL-EP1.5 | U12 |
| 1 | BQ27421YZFR-G1A | easyeda2kicad:DSBGA-9_L1.5-W1.5-R3-C3-P0.50-BL | U14 |
| 1 | CONN_01X04 | espip_boy_rev2:01X04P 1.27MM | P2 |
| 1 | CP2102N-A02-GQFN28R | Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm_ThermalVias | U2 |
| 1 | ESP32-WROOM-32E(8MB) | RF_Module:ESP32-WROOM-32E | U8 |
| 1 | GT-USB-7010ASV | easyeda2kicad:USB-C-SMD_G-SWITCH_GT-USB-7010ASV | U4 |
| 1 | ICS-43434_C5656610 | easyeda2kicad:MIC-SMD_6P-L3.5-W2.7-P0.90-BL | U10 |
| 1 | LIS2MDLTR | easyeda2kicad:LGA-12_L2.0-W2.0-P0.50-BL | U9 |
| 1 | LTR-390UV-01 | easyeda2kicad:SENSOR-SMD_LTR-390UV-01 | U1 |
| 1 | MAX30102EFD+T_C6454833 | easyeda2kicad:OESIP-14_L5.6-W3.3-P0.80-TL | U13 |
| 1 | MAX98357AETE+T | easyeda2kicad:TQFN-16_L3.0-W3.0-P0.50-BL-EP1.5 | U17 |
| 1 | ME6206B18XG | Package_TO_SOT_SMD:TSOT-23 | U18 |
| 1 | ME6217A33PG | Package_TO_SOT_SMD:SOT-89-3 | U11 |
| 1 | TF PUSH | easyeda2kicad:TF-SMD_TF-PUSH | CARD1 |
| 1 | TZ-P2-0402YGTIA1-0.45T | LED_SMD:LED_0402_1005Metric | LED1 |
| 1 | XF2M-2015-1A | easyeda2kicad:FPC-SMD_20P-P0.50_XF2M-2015-1A | FPC1 |
| 1 | YSN8010SJ 32.768KHZ | easyeda2kicad:SOP-8_L4.9-W3.9-P1.27-LS6.0-BL | U7 |
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Questions
How big is the Espip boy rev2 PCB?
It measures 35 × 45 mm and has 4 copper layers, 0.8 mm thick.
What parts does the Espip boy rev2 use?
111 parts, built around the CP2102N-A02-GQFN28R, LTR-390UV-01, MAX98357AETE+T and BMI270. 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 Espip boy rev2 KiCad files?
From the maxgohren/ESPip-Boy repository on GitHub, at the commit this page was made from: the board is hardware/easyeda_pcb_to_kicad/espip_boy_rev2.kicad_pcb and its schematic hardware/easyeda_pcb_to_kicad/espip_boy_rev2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Espip boy rev2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask maxgohren before reusing the design.