Welcome to e‑basteln.de!


A collection of hobby projects, playing with mostly obsolete technology: Classic arcade games in smaller packages, vintage computing (think 1950s and 60s), and an incomplete-but-not-abandoned attempt to build a scanning tunneling microscope with atomic resolution.

Latest addition: The 65F02, a re-implementation of the 65C02 microprocessor in an FPGA, in a pin-compatible format that lets you upgrade old computers and games to 100 MHz clock rate!

Arcade Games

I like old arcade games from the 70s and 80s (although I’m not good at playing them). Some of these early games generate their video display in unusual ways – by drawing vectors via X/Y control of the CRT’s electron beam, or by generating their video signal from hard-wired TTL logic.

Two projects in this section feature original circuit boards in new, smaller enclosures which showcase the boards. Also, a small MAME cabinet specializing in vertical-format arcade games from the “Golden Age”, based on a Raspberry Pi and a customized mechanical joystick.

Asteroids mini
PONG
Verticade

Vintage Computing

… where vintage is defined as anything from “older than me” to “my first computer”. Pocket-sized replicas of 1950’s magnetic drum computers, a mouse from 1968, and the 6502 CPU from 1975 re-implemented to run at 100 MHz.

LittleGP-30
RPC-4000
LGP-21
Telefunken Rollkugel
65F02

Other Projects

A catch-all for projects that don’t fit the categories above. At the moment, this comprises my – fairly comprehensive but unfinished – Scanning Tunneling Microscope project, and modification instructions for an echo effect pedal for musicians.

Homebrew STM
DanEcho Mod

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