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keyakko/mosfet-module
Re-purposing a motherboard MOSFET to serve as an electrical switch.

Re-purposing a motherboard MOSFET to serve as an electrical switch.
Mosfet module is an open-source printed circuit board by keyakko, from the keyakko/mosfet-module repository on GitHub, published under the MIT licence. It is a 2-layer board of 12 × 48 mm with 17 parts on 7 nets, routed with 27 tracks and 16 vias.
It is built around the CSD17578Q5A. Its parts include 3 resistors, 3 connectors, 2 transistors and 1 diode.
Re-purposing a motherboard MOSFET to serve as an electrical switch.

I am a beginner in circuit design, so there may be issues with the wiring.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | , , , , | ||
| 2 | Conn_01x02_Socket | Connector_JST:JST_XH_B2B-XH-AM_1x02_P2.50mm_Vertical | J2, J3 |
| 2 | MountingHole_3.2mm_M3_Pad_Via | MountingHole:MountingHole_3.2mm_M3_Pad_Via | M3, M3 |
| 2 | R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3 |
| 1 | CSD17578Q5A | Package_TO_SOT_SMD:TDSON-8-1 | Q1 |
| 1 | CSD17578Q5A | Package_SO:SOP-8_3.76x4.96mm_P1.27mm | Q2 |
| 1 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | R | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1 |
| 1 | Terminal | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J1 |
The 16 most common of 17 parts.

keyakko/mosfet-module
Re-purposing a motherboard MOSFET to serve as an electrical switch.


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It measures 12 × 48 mm and has 2 copper layers, 1.6 mm thick.
17 parts, built around the CSD17578Q5A. 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.
From the keyakko/mosfet-module repository on GitHub, at the commit this page was made from: the board is mosfet-module.kicad_pcb and its schematic mosfet-module.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).