2 layers248.3 × 147.3 mm
PCB BOARD DESIGN FOR IOT ENABLED WEARABLE HEALTH MONITOR
NITHYAR2005/PCB-BOARD-DESIGN-FOR-IOT-ENABLED-WEARABLE-HEALTH-MONITOR
9 parts
2 layers
The circuit uses an LM358 op-amp to amplify signals from a microphone and includes battery charging capabilities using the TP4057 charger IC.
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 37
- Nets
- 79
- Pads
- 205
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 31 Aug 2024
- Updated
- 15 Sep 2024
Overview
Sih is an open-source printed circuit board by Faulty404, from the Faulty404/SLD_Pen-Pad repository on GitHub. It is a 2-layer board with 37 parts on 79 nets.
It is built around the ESP32-D0WD, LM358 and AP2112K-3.3, with the MPU-6050, TP4057 and IRLZ44N among its other parts. Its parts include 12 capacitors, 11 resistors, 6 ICs, 1 diode and 1 transistor. It belongs with the ESP32 boards of this library.
Main components
6
ESP32-D0WD
QFN-48-EP(5x5)-40℃~+125℃ -98dBm 130mA 150Mbps 2.3V~3.6V 2.412GHz~2.484GHz 2.4GHz 20dBm 95mA Bluetooth、WiFi SPI、UART、ADC、I2C、I2S、PWM、SDIO Supports FEC function、CRC check function、DMA function transceiver QFN-48-EP(5x5) RF Transceiver ICs ROHSEspressif SystemsRF Transceiver ICs
LM358
SOP-8-18V~18V 0℃~+70℃ 1.2MHz 10nA 2 24mA 3V~36V 500uA 50nA 5mV 80dB Built-in compensation SOP-8 Operational Amplifier ROHSMSKSEMIOperational Amplifier
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
MPU-6050
QFN-24-EP(4x4)-40℃~+85℃ 16bit 1KB 2.375V~3.46V 5uA Accelerometer Gyroscope I2C X,Y,Z X,Y,Z ±16g ±2000dps QFN-24-EP(4x4) Accelerometers ROHSTDK InvenSenseAccelerometers
TP4057
SOT-23-6-40℃~+85℃ 1 25uA 4.24V 4V~6.5V Charging IC Lithium Battery Not supported SOT-23-6 Battery Management ROHSTECH PUBLICBattery Management
IRLZ44N
TO-22055V 47A N-Channel HEXFET® Power MOSFETInfineon TechnologiesUncategorised
README
Electronic_design/README.mdSchematic and PCB design for an ESP32-based smart pen circuit.
The circuit uses an LM358 op-amp to amplify signals from a microphone and includes battery charging capabilities using the TP4057 charger IC.
ESP32-D0WD: The main microcontroller chip used for processing and wireless communication.
AP2112K-3.3: A 3.3V linear voltage regulator providing stable power to the ESP32.
TP4057: A lithium-ion battery charger IC for charging a 3.7V LiPo battery.
LM358: Operational amplifier used to amplify the microphone signal.
Microphone: Used to capture audio input from the user.
The gain of the op-amp can be adjusted using the potentiometer.
This basic circuit aims at taking input using microphone(on the body of smart pen) from the user and processing it to the ESP 32 which has bluetooth module used to send the text to speech code to the smart board connected.
Parts
37| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 100n | Capacitor_SMD:C_0603_1608Metric | C1, C2, C5, C7, C12 |
| 3 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R4, R8 |
| 3 | 10u | Capacitor_SMD:C_0603_1608Metric | C4, C9, C13 |
| 2 | 0.1u | Capacitor_SMD:C_0603_1608Metric | C3, C10 |
| 2 | 4.7k | Resistor_SMD:R_0603_1608Metric | R6, R7 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R9, R10 |
| 1 | 10 K | Potentiometer_SMD:Potentiometer_ACP_CA6-VSMD_Vertical | RV1 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 10K | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 1N5819 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 2.2k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 3.7V | Battery:BatteryHolder_Keystone_2998_1x6.8mm | BT1 |
| 1 | 40MHz | Capacitor_SMD:C_0603_1608Metric | Y1 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-223-5 | U2 |
| 1 | C0720B001F | C0720B001F:XDCR_C0720B001F | M1 |
| 1 | C_Polarized | Capacitor_SMD:C_Elec_3x5.4 | C11 |
| 1 | ESP32-D0WD | ESP32-D0WD:QFN35P500X500X90-49N | U1 |
| 1 | IRLZ44N | Package_TO_SOT_SMD:SOT-223 | Q1 |
| 1 | LM358 | Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm | U4 |
| 1 | MCP73831-2-MC | Package_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.7x1.4mm | U6 |
| 1 | MPU-6050 | MPU-6050:QFN50P400X400X95-24N | U5 |
| 1 | Microphone | MountingEquipment:DINRailAdapter_3xM3_PhoenixContact_1201578 | MK1 |
| 1 | R_prog | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | TP4057 | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | USB_C_Receptacle_PowerOnly_6P | Connector_USB:USB_C_Receptacle_Amphenol_12401548E4-2A | J1 |
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Questions
What parts does the Sih use?
37 parts, built around the ESP32-D0WD, LM358, AP2112K-3.3 and MPU-6050. 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 Sih KiCad files?
From the Faulty404/SLD_Pen-Pad repository on GitHub, at the commit this page was made from: the board is Electronic_design/sih.kicad_pcb and its schematic Electronic_design/sih.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sih design in my own project?
Its repository states no licence, so its author keeps all rights: ask Faulty404 before reusing the design.