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Expansion connector board

MEGA65·mega65-r3-expansion-board·expansion_connector_board/expansion_connector_board.kicad_pcb

Expansion connector board layout, top view — open source Raspberry Pi board by MEGA65

About the Expansion connector board

Expansion connector board is an open source Raspberry Pi PCB design by MEGA65, published on GitHub. It is a 2-layer board measuring 154 × 93.2 mm, with 18 components from 14 distinct parts.

Its main chip is the RaspberryPi_Pico_W, from the Raspberry Pi family. Other key parts include the 74CBTLV3257. By type, the board carries 11 connectors, 3 resistors, 1 IC, 1 module, 1 switch and 1 diode.

From the project

Expansion board for the MEGA65 R3+ Main Boards

Main components on the Expansion connector board

74CBTLV3257RaspberryPi_Pico_W

Expansion connector board bill of materials (BOM)

18 components, 14 distinct parts.

QtyPartRefs
1
74CBTLV3257
U1
1
RaspberryPi_Pico_W
A1
2
POWER RELAY
J1, J13
1
GPIO Breakout
J2
1
693063020911
J3
1
MEGA65 JTAG+SERIAL HEADER
J4
1
EXP BOARD TE0790 RELAY
J5
1
Helper/Peripheral UART Interface
J6
1
Conn_01x04
J7
2
Conn_02x17_Top_Bottom
J12, J14
1
MEGA65 R4+ Analog Audio Header
J19
1
WRITE REQUEST PUSH BUTTON
SW1
1
1N5819
D1
3
10K
R1, R2, R3

Expansion connector board design files

The KiCad project lives in the MEGA65/mega65-r3-expansion-board repository on GitHub; these links point at the commit this page was built from.

Expansion connector board: common questions

What microcontroller does the Expansion connector board use?

The Expansion connector board is built around the RaspberryPi_Pico_W, from the Raspberry Pi family.

How big is the Expansion connector board?

The Expansion connector board measures 154 × 93.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Expansion connector board?

18 components, from 14 distinct parts. The full bill of materials is listed on this page.

Where can I download the Expansion connector board design files?

From the MEGA65/mega65-r3-expansion-board repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Expansion connector board design in my own project?

The repository has no license, so all rights stay with MEGA65. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Expansion connector board without the hardware?

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

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