4 layers101.5 × 83.4 mm
Thermostat
jrtaylor71/Smart-Thermostat-Alt-Firmware
A comprehensive, feature-rich smart thermostat firmware for ESP32-S3 microcontrollers with touch display, web interface, and Home Assistant integration.
91 parts2
2 layers91 × 61.5 mm
Electronics 8 PCB
TF-141-0/RC_SECCY_Task_RepoThe schematic and PCB layout must ensure proper, logical, and real-world-ready electrical connections between all components.
- Size
- 91 × 61.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 20
- Nets
- 48
- Pads
- 100
- Tracks, vias
- 117, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 16 May 2025
- Updated
- 23 May 2025
Overview
Electronics 8 PCB is an open-source printed circuit board by TF-141-0, from the TF-141-0/RC_SECCY_Task_Repo repository on GitHub. It is a 2-layer board of 91 × 61.5 mm with 20 parts on 48 nets, routed with 117 tracks and 0 vias.
It is built around the LM2596T-5.0, AMS1117-3.3 and MPU-9250, with the BSS138 among its other parts. Its parts include 6 capacitors, 4 resistors, 3 ICs, 2 diodes and 2 transistors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
4
LM2596T-5.0
TO-220-5-40℃~+125℃@(TJ) 1 150kHz 3A 4.5V~40V 5V 5mA Buck Buck Built-in Fixed No TO-220-5 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
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
MPU-9250
QFN-24-EP(3x3)-40℃~+85℃ 2.4V~3.6V 8uA IMU (accelerometer + gyroscope) Motion event detection SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps QFN-24-EP(3x3) Accelerometers ROHSTDK InvenSenseAccelerometers
BSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
README
Electronics/readme.mdPCB Design Task – Arduino Nano + MPU9250 + Power Regulation + LEDs
Objective
Design a PCB circuit that includes the following components:
- Arduino Nano
- MPU9250 IMU Sensor Module
- Voltage Regulator to provide a stable 5V output from a 3S Li-ion battery pack
(11.1V nominal, made of 18650 cells) - Two LEDs
Deliverables
The schematic and PCB layout must ensure proper, logical, and real-world-ready electrical connections between all components. This includes best practices like:
- Pull-up resistors (e.g., for I²C)
- Decoupling capacitors
- Stable power routing
- Grounding discipline
1. Schematic Diagram (30 Points)
- Clean and well-organized schematic
- Proper component names and designators (e.g., R1, C2, U1)
- Labels for all net connections (e.g., VCC, GND, SDA, SCL)
- Fully logical and complete circuit for functional behavior
2. PCB Layout and Gerber Files (70 Points)
- Compact, clean layout on a single or double-layer PCB
- Good routing practices:
- Short trace lengths
- Proper signal/power separation
- Solid grounding
- Perform and pass DRC (Design Rule Check)
- Export manufacturer-ready Gerber files
Final Submission Should Include:
- Schematic.pdf
- Project.kicad_pcb
- Gerber/ directory with all layer files
- Optional: 3D renders or BOM (.csv) if available
Note: Use KiCad or a compatible open-source EDA tool.
Parts
20| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | C_45deg | Capacitor_SMD:C_0805_2012Metric | C7, C8, C9 |
| 2 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | C_Polarized | Capacitor_SMD:CP_Elec_6.3x9.9 | C2, C4 |
| 2 | LED | LED_THT:LED_D5.0mm | D1, D2 |
| 2 | R_45deg | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | R_Small | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R4 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | Arduino_Nano_v3.x | Module:Arduino_Nano | A1 |
| 1 | Battery | Battery:BatteryHolder_Keystone_1042_1x18650 | BT1 |
| 1 | C_45deg | Capacitor_SMD:CP_Elec_6.3x5.3 | C6 |
| 1 | Fuse | Fuse:Fuseholder_TR5_Littelfuse_No560_No460 | F1 |
| 1 | LM2596T-5 | Package_TO_SOT_THT:TO-220-5_P3.4x3.7mm_StaggerOdd_Lead3.8mm_Vertical | U2 |
| 1 | MPU-9250 | Sensor_Motion:InvenSense_QFN-24_3x3mm_P0.4mm | U1 |
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Questions
How big is the Electronics 8 PCB PCB?
It measures 91 × 61.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Electronics 8 PCB use?
20 parts, built around the LM2596T-5.0, AMS1117-3.3, MPU-9250 and BSS138. 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 Electronics 8 PCB KiCad files?
From the TF-141-0/RC_SECCY_Task_Repo repository on GitHub, at the commit this page was made from: the board is Electronics/Electronics_8_PCB.kicad_pcb and its schematic Electronics/Electronics_8.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Electronics 8 PCB design in my own project?
Its repository states no licence, so its author keeps all rights: ask TF-141-0 before reusing the design.