วีดีโอ

Welp, the problem was bigger than I thought. As we see the blob is actually not where we thought it was! There is also damage to heat seal in several places that compels me to completely strip the assembly. Will this ever be salvageable? It is certainly one of the worst case scenarios one encounters in repair… However this is how it is when you film the ongoing work rather than complete series....

In this episode we code a few simple effects for alphanumeric 4x20 LCD in Common Lisp. The display is to be further used in a jog wheel controlled menu tree. The project is available at github.com/varjagg/menuett

We take first look at Teletype Corporation Model 35B Tape Typing Unit. This is an ASCII machine that prints on a 1 inch roll tape, and is based on Teletype Typing Reperforator units (LPR).

A short video to demonstrate how signal analysis can be done on sine signal sources. With an inexpensive arb generator on the input of 53310A we can clearly see the limitations and peculiarities of the source.

In this video we measure the coherence of a distributed soft real-time software system synchronized over Precision Time Protocol. Two terminal devices are connected over the network to a central. The central generates synchronous commands to both units which are executed on the basis of PTP-synchronized local clocks. The Hewlett-Packard 53310A Modulation Domain Analyzer allows quick and conveni...

A quick update on this project. The recapped supply has to be put aside as it appears to have undiagnosed damage on one of its power rails. The unit is brought back to life with a substitute PSU, presumably from a decade later when Hewlett-Packard transitioned to Agilent. Anticlimactic I know but that's the drawback of making the videos in sync with project flow rather than producing them upon ...

In this episode we further disassemble Casio PB-2000C pocket computer. We also give it a thorough wash in alcohol and restore the thread insert after the extracted damaged M1.6 screw.

The second instalment of our Casio pocket computer epic where we attempt to remove the stuck screw on the cover and see if we can get the thing to boot up.

We have a first look at a Casio PB-2000C personal computer bought AS-IS over the net. This is a sibling system to a much rarer, Japanese market only Lisp programmable AI-1000. It's not like am too short of ongoing restoration projects, but my hope for this to be the fist part of restoration videos. Although one should certainly not expect @atkelar level refurbishment here, I'll do my best to ge...

In this video we examine power supply failure of a Hewlett-Packard 53310A Modulation Domain Analyzer. The 53310A can be thought of as a versatile counter for measuring jitter and other signal qualities in frequency vs time domain, either from one source or for intervals between multiples. It can be very useful in real time systems development that we could hopefully see once the instrument is r...

First look, tests and initial repair for the Soviet МС6312 inkjet printer. We look into the power supply fault and fix one of the flex cables. The printer is "inspired" by Kodak Diconix 150 although is not an exact copy electronically or mechanically. Schematics for the controller: blog.funcall.org/docs/soviet_inkjet/schematics1.gif For the PSU board: blog.funcall.org/docs/soviet_inkjet/schemat...

A brief introduction to EURISKO with a demo run. EURISKO is a discovery system written by Douglas B. Leant in early 1980s in Interlisp-D. EURISKO sources rediscovery by WhiteFlame: white-flame.com/am-eurisko.html EURISKO repository adapted by seveno4 to run on Medley Interlisp: github.com/seveno4/EURISKO Medley Interlisp: interlisp.org/software/

In this video we explore an eclectic Soviet-era homebrew 8-bit computer. The system is based off a Sinclair ZX Spectrum clone, with bits and pieces from ES series computers and improvised auxiliary circuits.