Elektor Junior Computer Revival

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bprosman
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Joined: Sun Mar 29, 2015 10:27 pm
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Elektor Junior Computer Revival

Post by bprosman » Thu Aug 02, 2018 4:27 pm

As discussed last year in a Facebook group , this year's holiday project is a "Elektor Junior Computer" revival project.
This means I will redesign the original Elektor PCB , in Kicad and will order a few from JLCPCB.
I have contacted Elektor about this and as long as I only "sell" these PCB's to friends they are OK with it, as long as it it doesn't become a commercial project.
For this project I set myself some design goals meaning :
- Stay to the original PCB design as much as possible
- The only changes I will make are :
- The 2708 will become a 2732 saving me the +12, and +/-5V supplies.
- I will create a piggy-back PCB to be able to use some more cheap key switches, the "Digitasten" become rare and expensive.

It is quite a challenge to get as close as possible to the original schematic using Kicad. Attached an example of the 1st part, the display.
Junior_0001.JPG
The documentation (PCB scans) can be found at :
https://retro.familie-prosman.nl/2018/0 ... uter-1980/
Last edited by bprosman on Thu Aug 02, 2018 4:28 pm, edited 1 time in total.

bprosman
Posts: 196
Joined: Sun Mar 29, 2015 10:27 pm
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Re: Elektor Junior Computer Revival

Post by bprosman » Wed Aug 08, 2018 10:25 am

Version 0.0 of the schematic is there. Let the checking begin.
Elektor Junior V0_0.pdf
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Last edited by bprosman on Wed Aug 08, 2018 10:29 am, edited 1 time in total.

d.dirk
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Joined: Fri Oct 19, 2018 10:21 am
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Re: Elektor Junior Computer Revival

Post by d.dirk » Fri Oct 19, 2018 10:36 am

Hello, I'm interested in your Junior project. How can I get more information?

bprosman
Posts: 196
Joined: Sun Mar 29, 2015 10:27 pm
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Re: Elektor Junior Computer Revival

Post by bprosman » Sat Oct 20, 2018 12:23 am

Posting my progress here :
https://www.facebook.com/groups/300152500491153/
Next week I will send the PCB's off for manufacturing.
Junior final.JPG
I did create a "Piggy Back" PCB to avoid the expensive "Digitasten". I could have put them on the board but wanted to stay as original as possible.
Not 100% happy with the keyboard solution yet (cosmetically).

Kind regards, Bram

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