2 layers
Audio Matrix
WidRojas/PCB-Hardware-Projects
Repo containing all PCB files alongside short project descriptions
2,519 parts
2 layers55.2 × 39.7 mm
Repo containing all PCB files alongside short project descriptions
- Size
- 55.2 × 39.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 37
- Nets
- 22
- Pads
- 103
- Tracks, vias
- 208, 24
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 26 May 2026
- Updated
- 2 Nov 2026
Overview
Buck is an open-source printed circuit board by WidRojas, from the WidRojas/PCB-Hardware-Projects repository on GitHub. It is a 2-layer board of 55.2 × 39.7 mm with 37 parts on 22 nets, routed with 208 tracks and 24 vias.
It is built around the LM5109BMA, LM393DR2GH and IRLZ44N, with the M20-9990246 among its other parts. Its parts include 13 resistors, 10 capacitors, 5 ICs, 3 diodes and 2 connectors. It belongs with the power boards of this library.
Main components
4
LM5109BMA
SOIC-8-40℃~+125℃ 15ns 15ns 1A 1A 2 300uA 800mV~2.2V 800mV~2.2V 8V~14V Half-Bridge MOSFET Under Voltage Protection、Enable shutdown SOIC-8 Gate Drivers ROHSTexas InstrumentsGate Drivers
LM393DR2GH
SOP-8ESD Protection SOP-8 Comparators ROHSonsemiComparators
IRLZ44N
TO-22055V 47A N-Channel HEXFET® Power MOSFETInfineon TechnologiesUncategorised
M20-9990246
插件,P=2.54mm-40℃~+105℃ 1 2.54mm 2.54mm 2P 3A 3mm 6.1mm Black Brass Pin Header Through Hole Tin 插件,P=2.54mm Pin Headers ROHSHarwinPin Headers
README
README.mdVariable Buck Converter(WIP)
This project involved creating a buck converter which could regulate a 10V power supply to voltage suitable for a breadboard. simulations were done in LTspice and KiCad was used for creating schematics and PCB Layout.
PCB Revision #1
Currently awaiting second revision, due to high currents causing gate driver IC to fry
LED Matrix
This project involved the creation of a LED matrix to be used in conjunction with audio visualizer software, LED's are charlieplexed, STM32C071RBT6 was selected due to relatively low cost.
Parts
37| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C5, C7, C9, C10 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R9, R10, R13 |
| 3 | 1N5819 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2, D3 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R5 |
| 2 | 4k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4 |
| 2 | TLV9101IDBVR | TLV910:DBV0005A_TEX | U2, U5 |
| 1 | 10n | Capacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | C1 |
| 1 | 1n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C2 |
| 1 | 1u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C8 |
| 1 | 210 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R14 |
| 1 | 25u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | 2k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R7 |
| 1 | 33u | ASPI Inductor:IND_ASPI-4030S-330M-T | L1 |
| 1 | 3k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R6 |
| 1 | 490 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 1 | 5 | Resistor_SMD:R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R11 |
| 1 | 500n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C6 |
| 1 | 5k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R8 |
| 1 | 5n | Capacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | C3 |
| 1 | Barrel_Jack_Switch | PJ_new:CUI_PJ-002A | J1 |
| 1 | IRLZ44N | Package_TO_SOT_THT:TO-220-3_Vertical | Q1 |
| 1 | LM393DR2G | LM393(onsemi):SOIC8_ONS | IC1 |
| 1 | LM5109BMA | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | LMC555xM | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | LOGO | logo:run | G*** |
| 1 | M20-9990246 | header(2pin):CONN2_M20-999_1x2_HRW | J2 |
| 1 | R_Potentiometer | ST32:ST-32 | RV1 |
Questions
How big is the Buck PCB?
It measures 55.2 × 39.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Buck use?
37 parts, built around the LM5109BMA, LM393DR2GH, IRLZ44N and M20-9990246. 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 Buck KiCad files?
From the WidRojas/PCB-Hardware-Projects repository on GitHub, at the commit this page was made from: the board is Buck/Buck.kicad_pcb and its schematic Audio_Matrix/Audio_Matrix.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Buck design in my own project?
Its repository states no licence, so its author keeps all rights: ask WidRojas before reusing the design.
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