HardLabs

SmartPortSD SMD

djtersteegc·smartportsd·smartport-smd/smartportsd-smd.kicad_pcb

SmartPortSD SMD PCB layout, top view — open source AVR/Arduino board by djtersteegc
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About the SmartPortSD SMD PCB

SmartPortSD SMD is an open source AVR/Arduino PCB design by djtersteegc, published on GitHub under the MIT license. It is a 2-layer board measuring 41 × 50 mm, with 24 components from 14 distinct parts.

Its main chip is the ATMEGA328P-A, from the AVR/Arduino family. Other key parts include the 4050 and AMS1117-3.3. By type, the board carries 8 capacitors, 8 resistors, 3 ICs, 2 connectors, 1 crystal and 1 switch.

From the project

Various PCB and case designs of the SmartPortSD hard disk emulator for Apple II computers.

There's an interactive BOM here, and CSV version with footprint info here. The interactive one is super useful when placing the SMD components.

C5 is an optional bulk capacitor for the 5V power rail near the MCU. In my experience building these it is not needed.

The SD card connector is commonly available from several different Chinese suppliers and often called "long body", "non popping", or "push pull" on AliExpress or eBay.

SmartPortSD SMD, from the project README
From the project README

Main components on the SmartPortSD SMD

ATMEGA328P-A4050AMS1117-3.3

SmartPortSD SMD bill of materials (BOM)

24 components, 14 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA328P-A
ATmega328P-A
U1
1
4050
U2
1
AMS1117-3.3
U3
1
16MHZ
16MHz
Y1
1
ICSP
J2
1
2041021-3
SD_Card_Push_Pull
J3
1
SW_SPST
SW1
1
LED
D1
3
0.1UF
0.1uf
C1, C4, C6
2
18PF
18pf
C2, C3
2
22uf 10V
C5, C7
1
47uf 10V
C8
7
10K
R1, R2, R4, R5, R6, R7, R8
1
470R
R3

SmartPortSD SMD design files

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

SmartPortSD SMD: common questions

What microcontroller does the SmartPortSD SMD use?

The SmartPortSD SMD is built around the ATMEGA328P-A, from the AVR/Arduino family.

How big is the SmartPortSD SMD PCB?

The SmartPortSD SMD measures 41 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SmartPortSD SMD?

24 components, from 14 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 SmartPortSD SMD design files?

From the djtersteegc/smartportsd 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 SmartPortSD SMD design in my own project?

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

Can I test firmware for the SmartPortSD SMD without the hardware?

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

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