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SCELBI

Just watched the video on the SCELIBI boards available. Is there a serial port to connect to a terminal?

12 comments

Comments (12)

Jun 21

I have my 8B on display at VCF SW, and of people who knew what it was, a not insignificant amount knew about it from YouTube putting these build videos in their feed.

Artem Kalinchuk

Jun 22

Replying to

That’s awesome! I wish more people were interested in old tech.

Peter Miller

May 16

Mike Willegal created an RS232 board for the SCELBI and has files and schematics here: https://www.willegal.net/blog/?p=4459 I have adapted this design to a SCELBI style:

This RS232 board is untested as I don't have my 1702A's programmed yet. (I have a set of five Arduino based programmers on order, so that should be soon.) However, this board in theory should be able to slot into any TTY interface chassis and be pin-compatible.

I will try to put together a Github repo for my own SCELBI related items. I also have a front panel with engravings I ordered from FrontPanel Express and a full sized metal enclosure from ProtoCase that I'd be happy to share files for.

EDIT: All files are in my GIT repo here: https://github.com/agentorange96/SCELBI

Edited

Artem Kalinchuk

May 16

Replying to

Thanks for sharing this!

Peter Miller

Jun 21

Replying to

As an update: The serial interface works, but I may have the card edge pinout wrong. So I'll need to revise that.

Artem Kalinchuk

Mar 16

Hello! The SCELBI has many I/O ports. To connect to a terminal, you will need an interface for that. You could use the original TTY interface board for terminals that support that. If you don’t have a current loop terminal, you can also use a current loop to RS232 converter such as this one: https://www.blackbox.com/en-ca/store/product/detail/RS232-to-Current-Loop-Converter-DB25-Female-to-Terminal-Block/CL1090A-F

Artem Kalinchuk

Mar 18

Replying to

The original had a standalone power supply but you can build yours any way you want to. If you can place the power supply into the same enclosure as the computer, along with the cassette interface boards, that would make a nice, compact computer.

Here is the power supply that I built:

Edited

Peter Miller

May 16

Replying to

I have design files for a lettered front panel from Front Panel Express and a correctly sized "BUD" box from Protocase available in my GIT repo: https://github.com/agentorange96/SCELBI If you're feeling adventurous you could cut out the IO holes and board mounts.

@Artem Kalinchuk I see you're selling SCELBI stuff now. Feel free to utilize, tweak and sell any of my designs so long as you credit me and Mike where applicable. (Some of my work adapts his, which I credit in the README files.) Having a source for the case pre-cut and drilled would be clutch. My design currently only provides pilot holes for the punch for the IO rather than the full hole.

Artem Kalinchuk

May 16

Replying to

Thanks! Having those pilot holes for IO is already huge since punching holes isn't too difficult with the right tool.