Mosfet switch board v1

charkster·mosfet_switch_board_v1·kicad/fast_fet_switch/fast_fet_switch.kicad_pcb

About the Mosfet switch board v1

Mosfet switch board v1 is an open source RP2040/RP2350 PCB design by charkster, published on GitHub under the MIT license. It is a 2-layer board measuring 26 × 49.5 mm, with 18 components from 13 distinct parts.

Its main chip is the QTPY-SAMD21-SMD, from the RP2040/RP2350 family. Other key parts include the TXS0108EPW, AP2127K-1.8 and AP2112K-1.2. By type, the board carries 5 connectors, 4 ICs, 4 resistors, 3 transistors and 2 capacitors.

From the project

MOSFET Switch board which can quickly toggle the switch and then toggle GPIO pins by a programmable delay.

An Adafruit QT PY SAMD21 UF2 file is included. See testmosfetswitch_board.py for SCPI commands.

Mosfet switch board v1, from the project README — From the project README

Main components on the Mosfet switch board v1

TXS0108EPW AP2127K-1.8QTPY-SAMD21-SMDAP2112K-1.2

Mosfet switch board v1 bill of materials (BOM)

18 components, 13 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	TXS0108EPW	TSSOP-20_4.4x6.5mm_P0.65mm	U1
1	AP2127K-1.8	SOT-23-5	U2
1	QTPY-SAMD21-SMD XIAO-RP2040-SMD	XIAO-RP2040-SMD	U4
1	AP2112K-1.2	SOT-23-5	U5
2	IRF4905	TO-220-3_Vertical	Q1, Q2
1	BS170	TO-92_Inline	Q3
2	CONN_01X03_PIN Conn_01x03_Pin	PinHeader_1x03_P2.54mm_Vertical	J1, J2
1	CONN_01X09_PIN Conn_01x09_Pin	PinHeader_1x09_P2.54mm_Vertical	J3
2	CONN_01X01_PIN Conn_01x01_Pin	PinHeader_1x01_P2.54mm_Vertical	J4, J5
2	1UF 1uF	C_0603_1608Metric	C1, C2
1	220	R_0603_1608Metric	R1
2	2k	R_0603_1608Metric	R2, R3
1	0	R_0603_1608Metric	R4

Mosfet switch board v1 design files

The KiCad project lives in the charkster/mosfet_switch_board_v1 repository on GitHub; these links point at the commit this page was built from.

Mosfet switch board v1: common questions

What microcontroller does the Mosfet switch board v1 use?

The Mosfet switch board v1 is built around the QTPY-SAMD21-SMD, from the RP2040/RP2350 family.

How big is the Mosfet switch board v1?

The Mosfet switch board v1 measures 26 × 49.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mosfet switch board v1?

18 components, from 13 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Mosfet switch board v1 design files?

From the charkster/mosfet_switch_board_v1 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Mosfet switch board v1 design in my own project?

Yes, under the terms of its MIT license, which charkster chose for the repository.

Can I test firmware for the Mosfet switch board v1 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.