2 layers104 × 158 mm
4 layers51 × 41.2 mm
Fet Boost
JackUlbrichBaker/Fet_Boostfet boost with relay switching
- Size
- 51 × 41.2 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 40
- Nets
- 36
- Pads
- 110
- Tracks, vias
- 138, 30
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 11 Oct 2025
- Updated
- 11 Oct 2025
Overview
Fet Boost is an open-source printed circuit board by JackUlbrichBaker, from the JackUlbrichBaker/Fet_Boost repository on GitHub. It is a 4-layer board of 51 × 41.2 mm with 40 parts on 36 nets, routed with 138 tracks and 30 vias.
It is built around the AMS1117-5.0 and MMBFJ201. Its parts include 16 capacitors, 8 resistors, 2 ICs, 2 diodes and 2 switches.
Main components
2
AMS1117-5.0
SOT-223-40℃~+125℃ 1 1.3V 15V 1A 5V 60dB Fixed Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
MMBFJ201
SOT-23-3L-55℃~+150℃ 1mA 300mV 350mW 40V N-Channel SOT-23-3L JFETs ROHSonsemiJFETs
Parts
40| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10u | Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm | C8, C9, C10, C14 |
| 4 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | IN, LED_Sw1, OUT, VCC1 |
| 3 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R4, R5 |
| 3 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6, R7, R8 |
| 3 | 5u | Capacitor_THT:C_Rect_L7.2mm_W7.2mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C2, C5, C13 |
| 2 | 100n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C11, C16 |
| 2 | 10p | Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm | C3, C4 |
| 2 | 1M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | 1n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C12, C15 |
| 2 | 1u | Capacitor_THT:C_Rect_L7.2mm_W5.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C1, C6 |
| 2 | 35k | PCM_4ms_Potentiometer:Pot_16mm_NoDet_RV16AF-4A | GAIN1, VOL1 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP1, TP2 |
| 1 | 40u | Capacitor_THT:C_Rect_L7.2mm_W7.2mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C7 |
| 1 | AMS1117-5.0 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | Conn_01x04_Pin | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J1 |
| 1 | D | Diode_SMD:D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2 |
| 1 | G6K-2 | Relay_SMD:Relay_DPDT_Omron_G6K-2F-Y | K1 |
| 1 | LED | LED_THT:LED_D3.0mm | D1 |
| 1 | MMBFJ201 | PCM_Package_TO_SOT_SMD_AKL:SOT-23 | Q1 |
| 1 | SW_SPDT | PCM_4ms_Switch:Switch_Toggle_SPDT_Mini_SolderLug | SW1 |
| 1 | ~ | Microchip_SSOP-AVR32SD:SSOP-20-7.2L_7.8W_AVR32SD | U2 |
Questions
How big is the Fet Boost PCB?
It measures 51 × 41.2 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Fet Boost use?
40 parts, built around the AMS1117-5.0 and MMBFJ201. 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 Fet Boost KiCad files?
From the JackUlbrichBaker/Fet_Boost repository on GitHub, at the commit this page was made from: the board is Fet_Boost.kicad_pcb and its schematic Fet_Boost.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Fet Boost design in my own project?
Its repository states no licence, so its author keeps all rights: ask JackUlbrichBaker before reusing the design.
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