HardLabs

Uart

nojan1·project-wrass·eda/uart/uart.kicad_pcb

Uart PCB layout, top view — open source board by nojan1

About the Uart PCB

Uart is an open source PCB design by nojan1, published on GitHub. It is a 4-layer board measuring 100 × 100 mm, with 53 components from 20 distinct parts.

Other key parts include the 74HCT08, 74HCT14, 74HCT193, 74HCT165 and 74HCT139. By type, the board carries 22 capacitors, 19 ICs, 9 jumpers, 2 connectors and 1 crystal.

From the project

The purpose of Project Wrass is to develop the Wrass 1.

The purpose of Project Wrass is to develop the Wrass 1.

A 6502 based computer having the following specs.

W65C02 running at 2Mhz Bankable RAM giving a total of approx 300KB of usable memory * Expansion bus for up to 16 devices

The 16KB ROM is bankable using an external switch. This allows the computer to run "2 sets" of software.

The existing one is a simple homebrew "monitor" giving access to simple read, write and jump commands.

Uart, from the project README
From the project README

Main components on the Uart

74HCT0874HCT1474HCT19374HCT16574HCT139CD74HCT40105E74HCT57474HCT59574HCT0074HCT7474HCT32

Uart bill of materials (BOM)

53 components, 20 distinct parts.

QtyPartRefs
1
74HCT08
U1
1
74HCT14
U2
4
74HCT193
U3, U4, U17, U20
2
74HCT165
U5, U6
1
74HCT139
U7
4
CD74HCT40105E
U8, U9, U13, U14
1
74HCT574
U10
1
74HCT595
U12
1
74HCT00
U15
1
74HCT74
U16
1
74HCT32
U18
1
74HCT74
U19
1
1.8xx
X1
1
RX/TX Con
J1
1
Conn_02x25_Odd_Even
J2
8
SolderJumper_2_Open
JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8
1
IRQ Disconnect
JP9
19
0.1uf
C1, C2, C6, C7, C8, C9, C10, C11 +11
1
100nf
C3
2
22pf
C4, C5

Uart design files

The KiCad project lives in the nojan1/project-wrass repository on GitHub; these links point at the commit this page was built from.

Uart: common questions

How big is the Uart PCB?

The Uart measures 100 × 100 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Uart?

53 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the Uart design files?

From the nojan1/project-wrass repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Uart design in my own project?

The repository has no license, so all rights stay with nojan1. Use it as a reference, and ask the author before reusing the design.

More boards in project-wrass