2 layers105.5 × 66.5 mm
Ampaudio
BillBanakos/Projects
This is a repository of the projects i have done in my unveristy years
26 parts
2 layers29.5 × 57 mm
Second
BillBanakos/ProjectsThis is a repository of the projects i have done in my unveristy years
- Size
- 29.5 × 57 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 17
- Nets
- 27
- Pads
- 81
- Tracks, vias
- 113, 6
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 1 Nov 2025
- Updated
- 7 Nov 2026
Overview
Second is an open-source printed circuit board by BillBanakos, from the BillBanakos/Projects repository on GitHub. It is a 2-layer board of 29.5 × 57 mm with 17 parts on 27 nets, routed with 113 tracks and 6 vias.
It is built around the MT3608, SFH 4546 and SS34. Its parts include 6 connectors, 2 resistors, 2 ICs, 2 diodes and 1 capacitor.
Main components
3
MT3608
SOT-23-6-40℃~+85℃ 1 1.2MHz 100uA、1.6mA 2A 2V~24V Adjustable Boost Boost Built-in No SOT-23-6 DC-DC Converters ROHS西安航天民芯DC-DC Converters
SFH 4546
插件-40℃~+100℃ 1.5V 130mW/sr@IF=100mA 950nm 插件 Infrared LED Emitters ROHSOSRAM Opto SemiconInfrared LED Emitters
SS34
SMA(DO-214AC)-55℃~+125℃ 3A 40V 500uA@40V 550mV@3A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
Parts
17| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | Conn_01x02 | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J2, J3, J4 |
| 2 | 5.1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | Rcc1, Rcc2 |
| 1 | 2.2k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 22μ | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1 |
| 1 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 4046 | Package_DIP:DIP-16_W7.62mm | U1 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | Conn_01x10 | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J5 |
| 1 | L_Ferrite | Inductor_SMD:L_6.3x6.3_H3 | L2 |
| 1 | MT3608 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | R_Potentiometer_Trim | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1 |
| 1 | SFH4546 | LED_THT:LED_D5.0mm | D2 |
| 1 | SS34 | Diode_SMD:D_SMA | D1 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J6 |
Questions
How big is the Second PCB?
It measures 29.5 × 57 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Second use?
17 parts, built around the MT3608, SFH 4546 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 Second KiCad files?
From the BillBanakos/Projects repository on GitHub, at the commit this page was made from: the board is cd4046be_pll_eval_board/second.kicad_pcb and its schematic LM386_with_CS_preamp_stage_Kicad/ampaudio.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Second design in my own project?
Its repository states no licence, so its author keeps all rights: ask BillBanakos before reusing the design.
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