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WP-2 IC-Card SRAM

bkw777·WP-2_IC-Card·PCB/WP-2_IC-Card_SRAM.kicad_pcb

WP-2 IC-Card SRAM PCB layout, top view — open source board by bkw777
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About the WP-2 IC-Card SRAM PCB

WP-2 IC-Card SRAM is an open source PCB design by bkw777, published on GitHub under the Custom license license. It is a 2-layer board measuring 54 × 54 mm, with 14 components from 8 distinct parts.

Other key parts include the AS6C4008-55STIN. By type, the board carries 4 resistors, 3 diodes, 3 capacitors, 1 IC, 1 connector and 1 battery holder.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

IC Cards for TANDY WP-2

The TANDY WP-2 and other clones of the Citizen CBM-10WP have an expansion slot that accepts "IC Cards".

Here are a few different cards to fit that slot.

A battery-backed SRAM card like the original cards A non-volatile MRAM card, a RAM card that doesn't need a battery A ROM card, there is new software that runs from a rom card but no known images of any old original rom cards A programming adapter that can read and write both the RAM and ROM cards outside of the WP-2 * A bus-tap/breakout card to allow connecting the bus to a breadboard or logic analyser etc

WP-2 IC-Card SRAM, from the project README
From the project README

Main components on the WP-2 IC-Card SRAM

AS6C4008-55STIN

WP-2 IC-Card SRAM bill of materials (BOM)

14 components, 8 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
AS6C4008-55STIN
AS6C4008
U1
1
SMS-138-01-G-S
SMS-138-01-S-S
J1
1
Keystone 3028
Keystone_3028
BT1
1
CUS-14TB
CUS-14B
SW1
3
BAV74-TP
BAV74
D1, D2, D3
1
CL21A105KBCLNNC
1u
C1
2
CL31A226MOCLNNC
22u
C2, C3
4
RC0805FR-07100KL
100k
R1, R2, R3, R4

WP-2 IC-Card SRAM design files

The KiCad project lives in the bkw777/WP-2_IC-Card repository on GitHub; these links point at the commit this page was built from.

WP-2 IC-Card SRAM: common questions

How big is the WP-2 IC-Card SRAM PCB?

The WP-2 IC-Card SRAM measures 54 × 54 mm, has 2 copper layers and is 1.2 mm thick.

How many components are on the WP-2 IC-Card SRAM?

14 components, from 8 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 WP-2 IC-Card SRAM design files?

From the bkw777/WP-2_IC-Card 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 WP-2 IC-Card SRAM design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

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