HardLabs

REXCPM BKW

bkw777·REX_Classic·PCB/REXCPM_bkw.kicad_pcb

REXCPM BKW PCB layout, top view — open source board by bkw777

About the REXCPM BKW PCB

REXCPM 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 19 components from 15 distinct parts.

Other key parts include the 122-1469, 1450-M29F800FB5AN6E2, LP2980AIM5X-3.3/NOPB, 4245 and NCV563SQ33. By type, the board carries 6 ICs, 6 capacitors, 3 resistors, 2 connectors, 1 jumper and 1 diode.

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.

REXCPM BKW, from the project README
From the project README

Main components on the REXCPM BKW

122-14691450-M29F800FB5AN6E2LP2980AIM5X-3.3/NOPB4245NCV563SQ33

REXCPM BKW bill of materials (BOM)

19 components, 15 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
122-1469
XCR3064XL
U1
1
1450-M29F800FB5AN6E2
RMLV3216AGSA
U2
1
LP2980AIM5X-3.3/NOPB
4245
U3
1
4245
U4
2
NCV563SQ33
U5, U6
1
Tandy_100_102_200_option_rom
J1
1
SM04B
J2
1
PORT_EN
JP1
1
BAT54C
D1
1
399-8001-1
4.7u
C1
3
4.7u
C2, C5, C6
1
1000u
C3
1
100p
C4
2
47k
R1, R2
1
1k
R3

REXCPM 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.

REXCPM BKW: common questions

How big is the REXCPM BKW PCB?

The REXCPM BKW measures 38 × 16.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the REXCPM BKW?

19 components, from 15 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 REXCPM 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 REXCPM 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