Microelectronics

Synopsis

This site centralizes all my projects in the microelectronics field.
The categories that I regularly maintain are System Design, Essays and Research, Repair and Maintenance, and New Projects.
All content in the Old Projects section is kept only for historical reasons and should be treated as such.

System Design

System Design Assembled Machines
Year: 2021-present | Language: English | Synopsis: Assembled machines from self designed and made x86 hardware.

ISA Signal View Interface
Year: 2020 | Language: English | Synopsis: A 16-bit ISA bus signal view interface card that allows visual inspection of ISA bus signalling.

ISA Video Display Controller
Year: 2020 | Language: English | Synopsis: A 16-bit ISA video display controller and accelerator card that implements VGA capabilities and 2 Mb of 32-bit interleaved video memory.

4Mx9 70ns 30-pin SIMM
Year: 2020 | Language: English | Synopsis: An 8-bit data with parity, 4 Mb single in-line memory module with a 30-pin interface.

ISA Audio Interface
Year: 2020 | Language: English | Synopsis: A 16-bit ISA audio interface card that implements a Sound Blaster compatible sound card with OPL3 FM synthesis.

IDC Data Cables
Year: 2020 | Language: English | Synopsis: Flat ribbon data cables for floppy and hard disk drives.

ISA I/O Interface
Year: 2020 | Language: English | Synopsis: A 16-bit ISA I/O interface card that implements a parallel port controller, dual serial port controllers, dual IDE hard disk interfaces, and dual floppy disk drive controllers. Optional ROM BIOS as well.

32-bit 80386DX ISA Single Board Microcomputer
Year: 2019-2021 | Language: English | Synopsis: A 32-bit single board microcomputer designed to fit a 16-bit ISA slot in a system backplane.

16-bit ATX ISA Backplane
Year: 2018 | Language: English | Synopsis: An ISA system backplane for either 8-bit or 16-bit microcomputers.

System Design PCB Encoding
Year: 2018- | Language: English | Synopsis: Explanation of printed circuit board encoding for my system design projects.

Essays and Research

Adapting an 80386DX ROM BIOS for PS/2 Keyboard Support
Year: 2021 | Language: English | Synopsis: Adaptation of an old ROM BIOS to allow for PS/2 keyboard support.

Preparing the Hewlett-Packard 16500C Logic Analysis System
Year: 2021 | Language: English | Synopsis: Getting my logic analysis system ready to use according to my needs.

Adaptec AHA-1542CP SCSI Controller ROM BIOS Language
Year: 2020 | Language: English | Synopsis: Converting a German language SCSI controller ROM BIOS to English.

VGA ROM Fonts
Year: 2020 | Language: English | Synopsis: Altering the VGA ROM Fonts on a Tseng Labs ET4000/W32i ISA video card.

Repair and Maintenance

StarView SV421 KVM Switch
Year: 2021 | Language: English | Synopsis: Capacitor replacement in late '90s KVM switch.

Hewlett-Packard 6624A System DC Power Supply
Year: 2021 | Language: English | Synopsis: Preventative maintenance and fan replacement in a system power supply.

Hewlett-Packard 16500C Logic Analysis System
Year: 2021 | Language: English | Synopsis: Repair and maintenance of a mid '90s logic analysis mainframe.

BTC 53 Series Keyboard
Year: 2020 | Language: English | Synopsis: Capacitor replacement in an old AT computer keyboard.

Topre Realforce 104US Keyboard
Year: 2020 | Language: English | Synopsis: LEDs replacement in a computer keyboard.

Lacie 5big Network 2 Network Attached Storage
Year: 2020 | Language: English | Synopsis: Capacitor replacement in an old NAS.

Adaptec AHA-1542CP SCSI Controller
Year: 2020 | Language: English | Synopsis: Capacitor replacement on another old ISA SCSI controller.

Adaptec AHA-1542CF SCSI Controller
Year: 2020 | Language: English | Synopsis: Capacitor replacement on an old ISA SCSI controller.

Siemens 80386DX ISA Single Board Computer
Year: 2020 | Language: English | Synopsis: D-Sub 25 connector replacement on a 386-class single board computer.

NEAT-575 Pentium ISA Single Board Computer
Year: 2020 | Language: English | Synopsis: Capacitor and Dallas time keeper replacement on a Pentium-class single board computer.

TRENDnet TEG-S80TXE
Year: 2020 | Language: English | Synopsis: Capacitor replacement in an 8-port Ethernet gigabit switch.

Cambridge Audio DacMagic 100
Year: 2020 | Language: English | Synopsis: Capacitor replacement in a digital to analog converter.

ASUS RT-N16 Wireless Router
Year: 2019 | Language: English | Synopsis: LED replacement in a wireless router.

Hewlett-Packard 3312A Function Generator
Year: 2019 | Language: English | Synopsis: Reparation of an old function generator.

New Projects

ISA Floppy Disk Drive and Serial Controller
Year: 2021 | Language: English | Synopsis: Construction of an 8-bit floppy disk drive and serial port controller by Sergey Kiselev.

AdLib Clone
Year: 2021 | Language: English | Synopsis: Assembly of a 1990 replica of the AdLib Music Synthesizer Card.

Logic Probe
Year: 2020 | Language: English | Synopsis: A simple CMOS logic probe capable of showing High, Low, Oscillating, and HI-Z signals.

Old Projects

Triple Power Supply
Year: 2017 | Language: Romanian | Synopsis: Triple linear power supply that can be used for Hameg HM8030 functions generator.

Stereo Buffer
Year: 2017 | Language: Romanian | Synopsis: A minimalistic stereo audio buffer with Germanium transistors.

Z80 Microcomputer Power Supply
Year: 2017 | Language: English/Romanian | Synopsis: Triple linear power supply for Z80-based microcomputers with dual +5 V rail regulation.

Zeta V2 Microcomputer Assembly
Year: 2017 | Language: Romanian | Synopsis: The Zeta SBC V2 microcomputer designed by Sergey Kiselev.

Nuclear Frequency Counter
Year: 2017 | Language: Romanian | Synopsis: An old industrial-grade Nuclear Scaler converted into a frequency counter.

Audio Sources Selector V.2
Year: 2009 | Language: Romanian | Synopsis: The improved version of my original 8 sources digital audio selector.

Z80 Microcomputer
Year: 2009 | Language: Romanian | Synopsis: My old Z80 microcomputer. Experimental project as well.

Z80 Minicomputer
Year: 2008 | Language: Romanian | Synopsis: My first miniature Z80 prototype computer. This is an experimental project.

CPLD Programmer
Year: 2008 | Language: Romanian | Synopsis: A CPLD programmer based on an original Xilinx design.

640K ROM Matrix
Year: 2008 | Language: Romanian | Synopsis: Experiments with larger EPROM chips.

32K ROM Matrix
Year: 2008 | Language: Romanian | Synopsis: Experiments with 2K EPROM chips.

Deck Mini Tachometer
Year: 2008 | Language: Romanian | Synopsis: This is an implementation of a miniature digital tachometer for cassette or reel-to-reel tape decks.

Audio Sources Selector
Year: 2007 | Language: Romanian | Synopsis: Prototype 8 sources digital audio selector.

Magic Wand
Year: 2006 | Language: Romanian | Synopsis: A digital microcontroller-based magic wand with purple LEDs.

Dynamic Light
Year: 2006 | Language: Romanian | Synopsis: I have found this LED dynamic lighting circuit in an old publication. So I build it for fun.

VFD tube VU-Meter
Year: 2006 | Language: Romanian | Synopsis: Experiments with a dual grid time-multiplexed electro-fluorescent VU-Meter based on an Soviet VFD tube.

Digital Tachometer
Year: 2005 | Language: Romanian | Synopsis: A digital microcontroller-based tachometer for reel-to-reel tape decks.

Parallel PIC Programmer
Year: 2005 | Language: Romanian | Synopsis: Construction of a parallel port PIC programmer based on Vladimir Soso's design.

Serial PIC Programmer
Year: 2005 | Language: Romanian | Synopsis: Construction of a serial port PIC programmer based on FENG3's design.

Disclaimer

The content of this site is provided on an AS-IS basis. No warranties whatsoever.
These are all hobby projects and no technical support is available other than the contents of the articles.


Copyright © 2004- Alexandru Groza
All rights reserved.
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