Having fun with the Schneider Automation / Telemecanique TSX Nano PLC. Its DOS based PL7-07 program IDE features a neat DRUM programming block that is a merge of old school mechanical control technique merged into modern programming for industrial control. Modern 20 years ago. Perfect for making a simple sequence control or a drum machine!
If you are interested in other old computers and the like, there is a great deal of server, computers and industrial automation controllers in the long list of teardown videos.
I would also like to invite you, to join the High Voltage Forum and take part in the many interesting discussions there. For this video there is a appropriate thread: https://highvoltageforum.net/index.php?topic=2181.0