4 layers198.1 × 130.8 mm
2 layers105.6 × 92.7 mm
Smart Posture Corrector
jsitech4/Projects- Size
- 105.6 × 92.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 68
- Nets
- 67
- Pads
- 230
- Tracks, vias
- 546, 104
- Pours
- 19
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Oct 2025
- Updated
- 4 Nov 2026
Overview
Smart Posture Corrector is an open-source printed circuit board by jsitech4, from the jsitech4/Projects repository on GitHub. It is a 2-layer board of 105.6 × 92.7 mm with 68 parts on 67 nets, routed with 546 tracks and 104 vias.
It is built around the CH340C, ESP32-WROOM-32 and AMS1117-3.3, with the UMH3N among its other parts. Its parts include 16 resistors, 15 capacitors, 10 diodes, 8 connectors and 4 ICs. It belongs with the ESP32 boards of this library.
Main components
4
CH340C
SOP-16-20℃~+70℃ 2Mbps 3.3V、5V 50uA 7mA Transceiver USB 2.0 SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
UMH3N
SOT-363-55℃~+150℃ 0.5uA 100 100mA 150mW 2 NPN (Pre-Biased) 250MHz 300mV 50V 5V 6.11kΩ NPN SOT-363 Digital Transistors ROHSJiangsu Changjing Electronics Technology (CJ)Digital Transistors
Parts
68| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 330R | Resistor_SMD:R_0805_2012Metric | R4, R5, R6, R7, R8, R16, R18, R19 |
| 7 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R3, R11, R13, R14, R15, R17 |
| 6 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C7, C8, C13, C14, C15 |
| 6 | Red | LED_THT:LED_D3.0mm | D3, D5, D7, D8, D9, D10 |
| 3 | MountingHole_2.5mm_Pad | MountingHole:MountingHole_2.5mm_Pad | M2, M2, M2 |
| 2 | 1N5819 | Diode_SMD:D_SMA | D1, D4 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C11, C12 |
| 2 | 4.7uF/16V | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B_HandSolder | C4, C9 |
| 2 | PC817XI | PCM_Package_DIP_AKL:SMDIP-4_W9.53mm | OC1, OC2 |
| 1 | +5V | TestPoint:TestPoint_Keystone_5015_Micro_Mini | J9 |
| 1 | +IN | TestPoint:TestPoint_Keystone_5015_Micro_Mini | J5 |
| 1 | -5V | TestPoint:TestPoint_Keystone_5015_Micro_Mini | J10 |
| 1 | -IN | TestPoint:TestPoint_Keystone_5015_Micro_Mini | J6 |
| 1 | 104 | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 10uF_16V | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C6 |
| 1 | 12MHz | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | 1N5824 | Diode_SMD:D_SMA | D2 |
| 1 | 20k | Resistor_SMD:R_0805_2012Metric | R2 |
| 1 | 220uF_16V | Capacitor_SMD:CP_Elec_6.3x7.7 | C10 |
| 1 | 33uH | Inductor_SMD:L_12x12mm_H6mm | L1 |
| 1 | 470nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 680uF_35V | Capacitor_SMD:CP_Elec_10x12.5 | C3 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | BSENS | Connector_Wire:SolderWire-0.1sqmm_1x01_D0.4mm_OD1mm | J24 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_15x7.5RM7.6 | BZ1 |
| 1 | CH340C | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U4 |
| 1 | ESP32-WROOM | RF_Module:ESP32-WROOM-32 | U3 |
| 1 | FLASH | Button_Switch_SMD:SW_SPST_CK_KXT3 | SW3 |
| 1 | Green | LED_THT:LED_D3.0mm | D6 |
| 1 | LM2596S-3.3V | Package_TO_SOT_SMD:TO-263-5_TabPin6 | U1 |
| 1 | LOGO | logo:CULogo | G*** |
| 1 | MPU6050 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J1 |
| 1 | Motor_DC | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | M1 |
| 1 | RESET | Button_Switch_SMD:SW_SPST_CK_KXT3 | SW2 |
| 1 | SD MODULE | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J15 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H13mm | SW1 |
| 1 | UMH3N | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q1 |
| 1 | USB_C Conn | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J11 |
| 1 | ~ | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP1 |
Questions
How big is the Smart Posture Corrector PCB?
It measures 105.6 × 92.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Smart Posture Corrector use?
68 parts, built around the CH340C, ESP32-WROOM-32, AMS1117-3.3 and UMH3N. 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 Smart Posture Corrector KiCad files?
From the jsitech4/Projects repository on GitHub, at the commit this page was made from: the board is ESP32/Smart_Posture_Corrector/hardware/Smart_Posture_Corrector.kicad_pcb and its schematic ESP32/Dual_Axis_Solar_Tracker/hardware/Dual_Axis_Solar_Tracker.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Smart Posture Corrector design in my own project?
Its repository states no licence, so its author keeps all rights: ask jsitech4 before reusing the design.
More from jsitech4/Projects
8- 2 layers100 × 90.1 mm
- 2 layers108.8 × 83.6 mm
- 2 layers101.2 × 76.6 mm
- 2 layers131.3 × 88.7 mm
- 2 layers91.6 × 57.8 mm
- 2 layers67.3 × 100 mm
- 2 layers97.8 × 137.6 mm
Similar boards
- 2 layers38 × 60 mm
Crossometer mini
fredszaq/crossometer-mini
Design files for crossometer-mini device
63 parts2CERN-OHL-S-2.0 - 2 layers81 × 98 mm
REFLOW OVEN V2
Charading/NETTA-Reflow-Oven-Conversion
I converted my NETTA Mini Oven 20L into a reflow oven.
74 parts - 4 layers65.9 × 52.9 mm
- 4 layers29.9 × 32 mm
Models heart rev1.1
KushlaVR/models-heart
Можливості: Керування через WIFI з телефона або ПК 5 незалежних каналів (світлодіоди/сервомотори) 1 Н-міст для підключення мотора (піковий струм до 3А) Вмонтована BMS 1S та контроллер заряду Li-Ion акумулятора з…
106 parts7GPL-3.0 - 4 layers50.8 × 81.3 mm
Esp32-s3-with ken interface
kawashimaken/general-purpose-ken-interface
A modular, multi-MCU prototyping platform with a unified pin-assignment standard and horizontally-stackable expansion boards.
41 parts3MIT - 4 layers85.6 × 54 mm
Frank air
rh1tech/frank-lab
FRANK Board Laboratory (work-in-progress board prototopyes)
184 parts4GPL-3.0 - 4 layers30 × 37.5 mm
Dongle
mornepousse/SpLiT_KaSe
Custom ergonomic split fully-wireless keyboard - ESP32-S3, NRF24L01+, KiCad 9
31 parts - 2 layers100 × 90 mm
System desgin project
dquang05/system_desgin_project
Academic project - AGV: line following robot
78 parts