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Apple2Card

profdc9·Apple2Card·Apple2Card/Apple2Card.kicad_pcb

Apple2Card PCB layout, top view — open source AVR/Arduino board by profdc9
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About the Apple2Card PCB

Apple2Card is an open source AVR/Arduino PCB design by profdc9, published on GitHub. It is a 2-layer board measuring 160 × 78.2 mm, with 77 components from 31 distinct parts.

Its main chip is the ATmega328P-P, from the AVR/Arduino family. Other key parts include the 74HCT32, 74HCT00, 82C55A, Slot1 and Slot2. By type, the board carries 28 resistors, 12 capacitors, 11 diodes, 10 jumpers, 7 ICs and 6 connectors.

From the project

Apple II Peripheral Card that Interfaces to a ATMEGA328P for SD card storage

This is a simple card that provides two SD cards as mass storage devices to ProDOS as well as will provide networking using a Wiznet W5500. A ATMEGA328P programmed using the Arduino development environment is interfaced to the Apple II bus using a 82C55 peripheral interface. The design uses only five commonly available integrated circuits, the 74HCT08 AND gate, 74HCT32 OR gate, 82C55A peripheral interface, a 28C256 flash memory chip, and a ATMEGA328P microcontroller, and so should be reasonably future-proofed as much as any design for a 40 year old computer can be.

Apple2Card, from the project README
From the project README

Main components on the Apple2Card

ATmega328P-P74HCT3274HCT0082C55ASlot1Slot228C256

Apple2Card bill of materials (BOM)

77 components, 31 distinct parts.

QtyPartRefs
1
ATmega328P-P
U1
1
74HCT32
U2
1
74HCT00
U3
1
82C55A
U4
1
Slot1
U5
1
Slot2
U6
1
28C256
U9
1
16 MHz
Y1
1
ICSP
J1
2
Conn_01x25
J2, J3
1
Conn_01x16
J4
1
SERCON
J5
1
WIZNET 5500
J6
1
Apple2Bus
BUS1
2
PWR
JP1, JP5
1
PG0
JP2
1
PG1
JP3
4
PG2
JP4, JP8, JP9, JP10
1
PROGRAM
JP6
1
PG3
JP7
Show 11 more
QtyPartRefs
1
SW_Push
SW1
4
LED
D1, D9, D10, D11
7
1N4148
D2, D3, D4, D5, D6, D7, D8
9
100 nF
C1, C4, C5, C6, C7, C8, C9, C10 +1
2
20 pF
C2, C3
1
10 uF
C14
7
10k
R1, R4, R11, R12, R13, R14, R20
9
4k7
R2, R3, R7, R8, R10, R18, R21, R22 +1
2
2k2
R5, R6
4
470R
R9, R17, R27, R28
6
1k
R15, R16, R19, R24, R25, R26

Apple2Card design files

The KiCad project lives in the profdc9/Apple2Card repository on GitHub; these links point at the commit this page was built from.

Apple2Card: common questions

What microcontroller does the Apple2Card use?

The Apple2Card is built around the ATmega328P-P, from the AVR/Arduino family.

How big is the Apple2Card PCB?

The Apple2Card measures 160 × 78.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Apple2Card?

77 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the Apple2Card design files?

From the profdc9/Apple2Card repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Apple2Card 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.

Can I test firmware for the Apple2Card 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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