HardLabs

REX Classic bkw

bkw777·REX_Classic·PCB/REX_Classic_bkw.kicad_pcb

REX Classic bkw PCB layout, top view — open source board by bkw777

About the REX Classic bkw PCB

REX Classic bkw is an open source PCB design by bkw777, published on GitHub under the Custom license license. It is a 2-layer board measuring 38 × 16.6 mm, with 13 components from 11 distinct parts.

Other key parts include the XCR3064XL-VQ44, AM29F800BB and LP2980-3.3. By type, the board carries 3 ICs, 3 connectors, 3 capacitors, 2 test points and 1 resistor.

From the project

REX for TRS-80 Model 100, 102, 200

Ordering tips for the pcb & carrier: on PCBWAY manually change the min tracks/spaces to 6mil/6mil For gold contacts, select ENIG copper finish For the carrier select material Nylon, process SLS PCBWAY is more expensive, especially for ENIG, and they don't have the best print option for the carrier. Elecrow is cheaper for ENIG, and their "High Strength Nylon" option for 3d printing is actually black nylon printed by MJF, which is the nicest for this. It's just that on Elecrow you have to upload the gerber zip and carrier stl from releases, there is no pre-configured buy page.

REX Classic bkw, from the project README
From the project README

Main components on the REX Classic bkw

XCR3064XL-VQ44AM29F800BBLP2980-3.3

REX Classic bkw bill of materials (BOM)

13 components, 11 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XCR3064XL-VQ44
U1
1
AM29F800BB
29F800BB
U2
1
LP2980-3.3
U3
1
Tandy_100_102_200_option_rom
J1
1
JTAG
J2
1
PRG
J3
1
Molex78802_PCB_28 Carrier
N1
2
10129379-902002BLF
PINHD-1X1
TP1, TP2
1
399-8001-1
1u
C1
2
1u
C2, C3
1
100k
R1

REX Classic bkw design files

The KiCad project lives in the bkw777/REX_Classic repository on GitHub; these links point at the commit this page was built from.

REX Classic bkw: common questions

How big is the REX Classic bkw PCB?

The REX Classic bkw measures 38 × 16.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the REX Classic bkw?

13 components, from 11 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 REX Classic bkw design files?

From the bkw777/REX_Classic 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 REX Classic bkw 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.

More boards in REX_Classic