4 layers89.5 × 88.5 mm
2 layers32 × 42 mm
NoahBEC
zosko/NoahBEC1NoahBEC - Buck convertor 12V to 5V 3A
- Size
- 32 × 42 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 19
- Nets
- 11
- Pads
- 45
- Tracks, vias
- 90, 30
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 Oct 2022
- Updated
- 7 Sep 2026
Overview
NoahBEC is an open-source printed circuit board by zosko, from the zosko/NoahBEC repository on GitHub. It is a 2-layer board of 32 × 42 mm with 19 parts on 11 nets, routed with 90 tracks and 30 vias.
It is built around the MP2303ADN and SS34. Its parts include 5 capacitors, 5 resistors, 5 connectors, 2 diodes and 1 IC.
Main components
2README
README.mdNoahBEC
The system uses a 12V-to-5V buck converter that is capable of providing 3A of current, specifically designed to power servos. This setup is intended for integration with the NoahFC controller, which likely refers to a flight controller or a similar electronic control unit. The buck converter efficiently steps down the input voltage from 12V to 5V, ensuring a stable and reliable power supply to the servos, which require a consistent 5V input for optimal performance. This combination of components is ideal for applications that demand precise control and power management, like RC plane using the NoahFC controller.
Scheme
| Board | Preview |
|---|---|
 |  |
Sponsorship
Huge thanks to PCBWay for sponsoring this project!
PCBWay is a go-to solution for anyone looking to create high-quality PCBs—whether you're a DIY enthusiast, a student, or a professional engineer.
They offer a wide range of services, including:
- Fast and reliable PCB prototyping
- Full assembly services
- Instant online quotes
- Quality checks by experienced engineers
- A smooth and straightforward ordering process
Thanks again to PCBWay for supporting this build and helping bring it to life!
Parts
19| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 22uF | Capacitor_SMD:C_0805_2012Metric | C5, C6 |
| 1 | 100K | Resistor_SMD:R_0805_2012Metric | R2 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 10K | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | 10nF | Capacitor_SMD:C_0805_2012Metric | C4 |
| 1 | 10uH | Inductor_SMD:L_7.3x7.3_H3.5 | L1 |
| 1 | 3.9nF | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 300 | Resistor_SMD:R_0805_2012Metric | R5 |
| 1 | 44.2K | Resistor_SMD:R_0805_2012Metric | R4 |
| 1 | 6.8K | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | BEC OUTPUT | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | GND | TestPoint:TestPoint_Pad_3.0x3.0mm | J6 |
| 1 | GND OUT | TestPoint:TestPoint_Pad_3.0x3.0mm | J8 |
| 1 | LED | LED_SMD:LED_0805_2012Metric | D2 |
| 1 | MP2303ADN | Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm | U1 |
| 1 | SS34 | Diode_SMD:Nexperia_CFP3_SOD-123W | D1 |
| 1 | VCC | TestPoint:TestPoint_Pad_3.0x3.0mm | J5 |
| 1 | VCC OUT | TestPoint:TestPoint_Pad_3.0x3.0mm | J7 |
Questions
How big is the NoahBEC PCB?
It measures 32 × 42 mm and has 2 copper layers, 1.6 mm thick.
What parts does the NoahBEC use?
19 parts, built around the MP2303ADN and SS34. 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 NoahBEC KiCad files?
From the zosko/NoahBEC repository on GitHub, at the commit this page was made from: the board is hardware/hardware.kicad_pcb and its schematic hardware/hardware.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the NoahBEC design in my own project?
Its repository states no licence, so its author keeps all rights: ask zosko before reusing the design.
Similar boards
- 4 layers96 × 100 mm
OtterCastAmp
Ottercast/OtterCastAmp
OtterCastAmp is an open-source WiFi Speaker amplifier, based on a Sochip S3 SoC. Powered by any USB PD adapter for up to 100W of music.
272 parts341MIT - 4 layers144.2 × 82.8 mm
SmartFuseBox
k3ldar/PowerControlHub
PowerControlHub is a flexible automation controller for 12V systems. It combines relay switching, sensor monitoring, and smart‑home connectivity (MQTT, Home Assistant, REST, BLE) into one device.
93 parts5GPL-3.0 - 2 layers99 × 56.3 mm
ReflowOven controller
TilenTinta/ReflowOven_controller
An open source controller for converting kitchen toaster oven to reflow oven
122 parts5MIT - 2 layers
- 4 layers60 × 56 mm
STM32F4 Breakout REV2
alphaseneca/pcb_design_repo
A repository for storing and documenting the pcb design files.
63 parts1MIT - 2 layers35 × 25 mm
- 4 layers60.4 × 25.2 mm
USB C Power Delivery Conveter
Hirusha785/usb-c-pd-buck-converter
🔌 A compact USB-C Power Delivery converter PCB that negotiates PD input and steps it down to a stable DC output. Includes schematic, PCB layout, and 3D render files. 🔋
24 parts1