2 layers66.9 × 54.2 mm Megaflash, the printed circuit board in 3D

Megaflash

MegaFlash for Apple IIc/IIc+ computer

Size: 66.9 × 54.2 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 14
Nets: 64
Pads: 194
Tracks, vias: 570, 128
Pours: 3
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 29 Mar 2025
Updated: 25 Oct 2026

Overview

Megaflash is an open-source printed circuit board by ThomasFok, from the ThomasFok/MegaFlash repository on GitHub, published under the MIT licence. It is a 2-layer board of 66.9 × 54.2 mm with 14 parts on 64 nets, routed with 570 tracks and 128 vias.

It is built around the W25Q01JVZEIQ and SS12. Its parts include 6 capacitors, 5 ICs, 1 diode and 1 connector. It belongs with the RP2040 and FPGA and CPLD boards of this library.

Main components

README

kicad/rev1.0a/README.md

Differences between Rev 1.0A and 1.0 PCB

The 3.3V voltage regulator is removed. The bus transceiver is powered by Pico board.
GPIO 8 and 9 of Pico (reserved for A2 and A3 address lines) are grounded.
The shape of the board is rectangular.

Category and platform

RP2040 FPGA and CPLD

Project files

Show this board on your page

https://pcbkit.io/boards/ThomasFok/MegaFlash/kicad/rev1.0a/megaflash.kicad_pcb

The board's own page, for a message or a post.

Source

Repository: ThomasFok/MegaFlash
Board file: kicad/rev1.0a/megaflash.kicad_pcb
Commit: 308e6b6
Licence: MIT

Parts

Qty	Value	Footprint	References
6	0.1u	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1, C2, C3, C4, C5, C6
2	W25Q01JVZE	Package_SON:WSON-8-1EP_8x6mm_P1.27mm_EP3.4x4.3mm	U4, U5
1	100k	Resistor_SMD:R_Array_Convex_4x0603	RN1
1	74LVCH16T245DLR	Package_SO:SSOP-48_7.5x15.9mm_P0.635mm	U1
1	EXPSLOT	misc:PinHeader_2x17_P2.54mm_Vertical_Mirror	J1
1	GAL16V8	Package_LCC:PLCC-20_SMD-Socket	U2
1	Pico	MCU_RaspberryPi_and_Boards:RPi_Pico_SMD_NO_LABEL_NO_DEBUG	U3
1	SS12	Diode_SMD:D_SMA	D1

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Questions

How big is the Megaflash PCB?

It measures 66.9 × 54.2 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Megaflash use?

14 parts, built around the W25Q01JVZEIQ and SS12. 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 Megaflash KiCad files?

From the ThomasFok/MegaFlash repository on GitHub, at the commit this page was made from: the board is kicad/rev1.0a/megaflash.kicad_pcb and its schematic kicad/rev1.0/megaflash.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Megaflash design in my own project?

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).