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Unimplemented Trap

unimplementedtrap.com

A blog of hardware and software stuff and things by Simon Boak

Retro computingElectronicsApple / classic Mac

’20’21’22’23’24’25’26
Posts
14 from 9 May 2020 to 28 Jun 2026
Posting
now and then (1 in the last year)
Kind
personal blog
Feed
https://unimplementedtrap.com/feed.xml

2026 1

  1. SB mini II: a homebrew Apple II clone

2025 2

  1. Building my own paper tape punch
  2. Modernising a vintage digital clock

2024 2

  1. Picontosh: The Pi-Icon-Macintosh...
  2. SB-A1: My Apple 1 clone with printer and SD Card storage

2023 3

  1. SB42 Random Number Generator
  2. A small cabinet for the PiDP-8 and 11
  3. Arduino games console with a vacuum fluorescent display

2022 1

  1. SB116 Programmers Calculator

2021 1

  1. SB181: A 74LS181 based "logic operator"

2020 4

  1. The world's least powerful computer? 1-bit CPU with the MC14500B industrial control unit
  2. "Programmable" LED Matrix Driver without a Microcontroller
  3. Modding a sheet metal brake into a box and pan brake
  4. ebd: Eight Bit Dump - A hexdump utility for 8 bit software development