LittleSwitchBus

profdc9·ModularTuner·Tuner/LittleSwitchBus/LittleSwitchBus.kicad_pcb

LittleSwitchBus PCB layout, top view — open source board by profdc9

About the LittleSwitchBus PCB

LittleSwitchBus is an open source PCB design by profdc9, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 101 components from 18 distinct parts.

Other key parts include the MCP23008 and ULN2803A. By type, the board carries 36 capacitors, 18 resistors, 15 connectors, 10 inductors, 8 diodes and 4 jumpers.

It belongs with the rf & radio designs in this gallery.

From the project

A Modular Antenna Tuner for a Phased Array Antenna System

This a project to create a Modular Antenna Tuner System that can be reconfigured for different needs. This material is copyrighted by Daniel Marks (KW4TI) and licensed under the Creative Commons License CC-BY-SA 4.0.

This project is a toolkit for making automatic antenna tuners and smart HF antennas.

A description and documentation of this project may be found in the "doc" directory as ModularTuner-Guide.pdf.

Main components on the LittleSwitchBus

MCP23008 ULN2803A

LittleSwitchBus bill of materials (BOM)

101 components, 18 distinct parts.

Qty	Part	Footprint	Refs
1	MCP23008	DIP-18_W7.62mm_Socket	U1
1	ULN2803A	DIP-18_W7.62mm_Socket	U2
10	Conn_Coaxial	bnc_90_1-1337543-0_pad_combo	J1, J2, J3, J4, J5, J6, J7, J8 +2
1	Conn_02x05_Odd_Even	Pin_Header_Straight_2x05_Pitch2.54mm	J11
4	Conn_01x01	1pin	J13, J14, J15, J16
4	Jumper_NC_Dual	Pin_Header_Straight_1x03_Pitch2.54mm	JP1, JP2, JP3, JP4
8	SPDTRelay	HK19FRelay	RLY1, RLY2, RLY3, RLY4, RLY5, RLY6, RLY7, RLY8
8	LED	LED_D3.0mm	D1, D2, D3, D4, D5, D6, D7, D8
10	100 uH	L_Axial_L5.3mm_D2.2mm_P7.62mm_Horizontal_Vishay_IM-1	L1, L2, L3, L4, L5, L6, L7, L8 +2
24	10 nF	C_Disc_D5.0mm_W2.5mm_P2.50mm	C1, C2, C3, C4, C5, C6, C7, C8 +16
4	10 nF	C_Disc_D5.0mm_W2.5mm_P5.00mm	C9, C14, C34, C35
4	100 nF	C_Disc_D5.0mm_W2.5mm_P2.50mm	C10, C13, C23, C33
1	100 uF	CP_Radial_Tantal_D5.0mm_P2.50mm	C11
2	C_Small	C_Disc_D5.0mm_W2.5mm_P2.50mm	C16, C17
1	10 nFl	C_Disc_D5.0mm_W2.5mm_P2.50mm	C22
2	10k	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R1, R2
8	1k	R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R3, R4, R5, R6, R7, R8, R9, R10
8	51R	R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal	R11, R12, R13, R14, R15, R16, R17, R18

LittleSwitchBus design files

The KiCad project lives in the profdc9/ModularTuner repository on GitHub; these links point at the commit this page was built from.

LayoutTuner/LittleSwitchBus/LittleSwitchBus.kicad_pcb

LittleSwitchBus: common questions

How big is the LittleSwitchBus PCB?

The LittleSwitchBus measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LittleSwitchBus?

101 components, from 18 distinct parts. The full bill of materials is listed on this page.

Where can I download the LittleSwitchBus design files?

From the profdc9/ModularTuner repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the LittleSwitchBus design in my own project?

The repository has no license, so all rights stay with profdc9. Use it as a reference, and ask the author before reusing the design.

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