FarahCelebi/PCB-Design-ProjectsA collection of PCB designs progressing from basic passive circuits to a complete USB-powered IoT sensor board — built in KiCad, covering schematic design, multi-layer layouts, power regulation, I2C communication, and USB-C connectivity.
IoT Environmental Monitor is an open-source printed circuit board by FarahCelebi, from the FarahCelebi/PCB-Design-Projects repository on GitHub, published under the MIT licence. It is a 2-layer board of 57 × 18 mm with 19 parts on 16 nets, routed with 118 tracks and 4 vias.
It is built around the ATTINY85-20PU, BME280 and AMS1117-3.3, with the USBLC6-2SC6 among its other parts. Its parts include 7 capacitors, 6 resistors, 4 ICs, 1 connector and 1 switch. It belongs with the home automation and IoT and sensors and measurement boards and the AVR (ATmega, ATtiny) boards of this library.
PCB Design Projects
A set of PCB designs built in KiCad, covering circuit fundamentals through to a complete USB-C powered environmental sensor system. Each project includes the full schematic, PCB layout, and the design reasoning behind key decisions — component selection, power regulation, signal integrity, and manufacturability.
Skills demonstrated
Projects
| # | Project | Description |
|---|---|---|
| 01 | LED Blink Circuit | Current-limited LED driver circuit with calculated resistor values for two different LED forward voltages. |
| 02 | ATtiny85 Microcontroller Board | Minimal ATtiny85 breakout with a proper reset circuit, decoupling, and a ground plane, on a 2-layer board. |
| 03 | AMS1117 Power Supply | 5V-to-3.3V regulated power supply with proper input/output decoupling, built on a 4-layer stackup with dedicated GND/power planes. |
| 04 | BME280 I2C Sensor Board | Self-contained sensor module with onboard 5V-to-3.3V regulation, an ATtiny85, and a BME280 environmental sensor over I2C. |
| 05 | USB-C Power Board | USB-C input with ESD protection, CC detection, differential pair routing, and 3.3V regulation. |
| 06 | IoT Environmental Monitor (Capstone) | Full system: USB-C input with ESD protection, onboard power regulation, an ATtiny85, and a BME280 sensor. Designed, fabricated, and assembled. |
Tools
About this repository
Each project folder contains:
This design and code is shared for portfolio review purpose only. All rights are reserved. Commercial use, reproduction, or distribution without prior consent is prohibited.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1, C3, C5, C6, C7 |
| 2 | 10kΩ | Resistor_SMD:R_0402_1005Metric | R3, R6 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric | C2, C4 |
| 2 | 4.7kΩ | Resistor_SMD:R_0402_1005Metric | R4, R5 |
| 2 | 5.1kΩ | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | ATtiny85-20P | Package_DIP:DIP-8_W7.62mm | U3 |
| 1 | BME280 | Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering | U4 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
FarahCelebi/PCB-Design-Projects
A collection of PCB designs progressing from basic passive circuits to a complete USB-powered IoT sensor board — built in KiCad, covering schematic design, multi-layer layouts, power regulation, I2C communication, and…
FarahCelebi/PCB-Design-Projects
A collection of PCB designs progressing from basic passive circuits to a complete USB-powered IoT sensor board — built in KiCad, covering schematic design, multi-layer layouts, power regulation, I2C communication, and…
FarahCelebi/PCB-Design-Projects
A collection of PCB designs progressing from basic passive circuits to a complete USB-powered IoT sensor board — built in KiCad, covering schematic design, multi-layer layouts, power regulation, I2C communication, and…
FarahCelebi/PCB-Design-Projects
A collection of PCB designs progressing from basic passive circuits to a complete USB-powered IoT sensor board — built in KiCad, covering schematic design, multi-layer layouts, power regulation, I2C communication, and…
FarahCelebi/PCB-Design-Projects
A collection of PCB designs progressing from basic passive circuits to a complete USB-powered IoT sensor board — built in KiCad, covering schematic design, multi-layer layouts, power regulation, I2C communication, and…
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It measures 57 × 18 mm and has 2 copper layers, 1.6 mm thick.
19 parts, built around the ATTINY85-20PU, BME280, AMS1117-3.3 and USBLC6-2SC6. 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.
From the FarahCelebi/PCB-Design-Projects repository on GitHub, at the commit this page was made from: the board is 06-IoT-Environmental-Monitor/kicad-project/IoT-Environmental-Monitor.kicad_pcb and its schematic 01-Led-Blink-Circuit/kicad-project/Led-Blink-Circuit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).