2 layers84.3 × 56.6 mm HDC, the printed circuit board in 3D

HDC

Buffered and Unbuffered 8 bit IDE interfaces for the zx Spectrum.

Size: 84.3 × 56.6 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 19
Nets: 97
Pads: 175
Tracks, vias: 507, 110
Pours: 2
Routed: Yes
KiCad: KiCad 6 (file 20211014)
Created: 13 Nov 2022
Updated: 13 Nov 2022

Overview

HDC is an open-source printed circuit board by spodula, from the spodula/Spec-IDE-Interface repository on GitHub. It is a 2-layer board of 84.3 × 56.6 mm with 19 parts on 97 nets, routed with 507 tracks and 110 vias.

It is built around the 74LS245SC, 74LS10PC and BC327. Its parts include 5 connectors, 4 resistors, 3 capacitors, 3 ICs and 2 diodes. It belongs with the retro computing and games and interfaces and adapters boards of this library.

Main components

README

README.md

Spec-IDE-Interface

Buffered and Unbuffered 8 bit IDE interfaces for the zx Spectrum.

This is a (Another) remake of the Pera Putnik/Gary Lancaster design for a simple 8-bit IDE interface for the zx Spectrum.

There are two versions of this, and unbuffered version which is basically the same as the PP/GL design except with additional HDD and Power LED pins.

The Buffered one buffers all the lines going to the Hard drive, which should make the interface more reliable for longer cable lengths.

Parts

Qty	Value	Footprint	References
3	330	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R2, R3, R4
3	47nf	Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm	C1, C2, C3
2	74LS245	Package_DIP:DIP-20_W7.62mm_LongPads	U1, U2
2	LED	LED_THT:LED_D5.0mm	D1, D2
1	100k	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R1
1	74LS10	Package_DIP:DIP-14_W7.62mm_LongPads	U3
1	BC327	Package_TO_SOT_THT:TO-92_Inline	Q1
1	DOM_POWER_ENABLE	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal	J5
1	HDD_LED	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal	J2
1	LOGO	bitmaps:kicad_bitmap	G***
1	PATA_40	Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical	J4
1	POWER	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal	J3
1	Spectrum 128/Grey +2 edge connector	Spectrum:Speccy_edge_External	J1

Questions

How big is the HDC PCB?

It measures 84.3 × 56.6 mm and has 2 copper layers, 1.6 mm thick.

What parts does the HDC use?

19 parts, built around the 74LS245SC, 74LS10PC and BC327. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the HDC KiCad files?

From the spodula/Spec-IDE-Interface repository on GitHub, at the commit this page was made from: the board is Buffered/HDC.kicad_pcb and its schematic Buffered/HDC.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the HDC design in my own project?

Its repository states no licence, so its author keeps all rights: ask spodula before reusing the design.

Category and platform

Retro computing and games Interfaces and adapters

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/spodula-spec-ide-interface-hdc" title="HDC in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/spodula-spec-ide-interface-hdc.jpg" alt="HDC" width="1200" height="900">

A picture that opens the board, for a README

[![HDC](https://pcbkit.io/embed/boards/spodula-spec-ide-interface-hdc.jpg?size=s)](https://pcbkit.io/boards/spodula-spec-ide-interface-hdc)

Source

Repository: spodula/Spec-IDE-Interface
Board file: Buffered/HDC.kicad_pcb
Commit: 3819471
Licence: Not stated

Similar boards

2 layers299.2 × 180 mm
2layer
ceteras/CoBra
A Z80 retro computer, ZX Spectrum compatible, can also run CP/M.
369 parts11MIT
2 layers80 × 100 mm
Simple 8-bit HD IF for Spectrum +3 v1.0
lostretrotapes/Simple-8-Bit-IDE-Interface-for-Spectrum-3e

11 parts1
2 layers
ZxIDE
TurBoss/ZxIDE
ZX Spectrum 128K 2+ IDE Adaptor
5 parts1
2 layers365.1 × 203.2 mm
DIAG
Nakazoto/CenturionComputer
This is just a simple backup of all the files related to the Centurion that I have stored on my HD. The Wiki itself has far more in-depth information about the Centurion and it's individual cards.
150 parts172
2 layers304.8 × 165.1 mm
Comix-35
schlae/comix-35
The COMIX-35 is an improved clone of the COMX-35 1802 home computer
173 parts138
2 layers254 × 134.6 mm
New enet
jayacotton/inettools-z80
Inet tools for z80-rc2014 tcp/ip stack code.
36 parts22MIT
2 layers100 × 100 mm
MZ2000 SD
yanataka60/MZ-2000_SD
MZ-80B、MZ-2000、MZ-2200でSD-CARDからのアプリケーション起動、BASICなどのアプリケーションからSD-CARDへのロード、セーブを実現するものです。
30 parts16MIT
2 layers279.4 × 203.2 mm
Z180GDC
lynchaj/rhyophyre
Single Board Computer featuring Zilog Z180 processor and NEC µPD7220 Graphics Display Controller
249 parts12