HardLabs

Cocousbhost

barberd·cocousbhost·kicad/cocousbhost.kicad_pcb

Cocousbhost PCB layout, top view — open source board by barberd

About the Cocousbhost PCB

Cocousbhost is an open source PCB design by barberd, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 98.3 × 87.3 mm, with 32 components from 19 distinct parts.

Other key parts include the 74LS30, 74LS682, 74LS04, 74LS74 and 74LS32. By type, the board carries 11 capacitors, 7 ICs, 5 resistors, 3 connectors, 2 transistors and 2 diodes.

It belongs with the keyboards and usb & debug tools designs in this gallery.

From the project

USB Host Cartridge for the Tandy TRS-80 Color Computer

This board is a cartridge for the Tandy Radio Shack TRS-80 Color Computer (CoCo), an 8 bit computer produced between 1980 and 1991. It provides a USB 2.0 Host controller, the CH376S, to the CoCo. This allows one to use USB devices with the Color Computer given software drivers for the device. See "Using the Board" below.

Assembly routines for using the cartridge in your own software can be found in the Software directory. This includes drivers for USB hubs, keyboards, mice, and mass storage devices (such as pendrives). Additionally, a software patch for the Color Computer 3's BASIC to use a…

Cocousbhost, from the project README
From the project README

Main components on the Cocousbhost

74LS3074LS68274LS0474LS7474LS3227128CH376S

Cocousbhost bill of materials (BOM)

32 components, 19 distinct parts.

QtyPartRefs
1
74LS30
U1
1
74LS682
U3
1
74LS04
U4
1
74LS74
U5
1
74LS32
U6
1
27128
U7
1
CH376S
U8
2
2N2222
Q1, Q2
1
12 Mhz
Y1
1
Conn_01x03_Male
J1
1
Jumper_2_Bridged
J2
1
USB_A
J3
1
SW_DIP_x07
SW1
2
LED
D1, D2
9
.1uf
C1, C2, C3, C4, C5, C6, C7, C8 +1
2
20pf
C9, C10
2
1k
R1, R2
2
10k
R3, R4
1
4.7k
R5

Cocousbhost design files

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

Cocousbhost: common questions

How big is the Cocousbhost PCB?

The Cocousbhost measures 98.3 × 87.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Cocousbhost?

32 components, from 19 distinct parts. The full bill of materials is listed on this page.

Where can I download the Cocousbhost design files?

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

Can I use the Cocousbhost design in my own project?

Yes, under the terms of its GPL-3.0 license, which barberd chose for the repository.

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