S1-AU Mk1: a 4-bit arithmetic unit

Hello all.

Thanks to the success of the S1-AU Mk1 project, I'm excited to announce the launch of the second ARITH-MATIC kit: S1-MU Mk1.

The S1-MU Mk1 is an 8-bit memory unit, using the (excellent) LY62256PL SRAM IC and, of course, a few 7400 series ICs too!!

You can discover more about the kit here: https://arith-matic.com/products/electronic-kits/s1-mu-mk1

The S1-MU and S1-AU are both available via the ARITH-MATIC website, with shipping to the UK, EU, USA & Canada!

Finally, a bit thank you to everybody who has supported the project, either by sharing with others, providing feedback, or by purchasing one of the kits.

Cheers,

Richard

Hi all.

It has been a while since I've updated this project page. This has been for numerous reasons but mainly because turning a kitchen table project into an actual product is seriously hard work!

I'm really proud, however, that the S1-AU Mk1 has been successfully launched and is now available via our new website: https://arith-matic.com/kits

I'm currently writing a (rather long) post about this experience - everything I've learnt, the trials and tribulations of launching a maker product, the strange world of compliance testing, the brilliant people I've met on route and the continuous inspiration I have found from other TTL-esque projects - I'll link to it from this page when it's ready!

In the mean time, if you'd like to find out more about the S1-AU Mk1, or arithmetic units in general, why not check the latest ARITH-MATIC note: Arithmetic Logic Units (ALU): An Introduction.

Now the red LEDs have arrived, here's a fairer comparison. Yellow or Red?.. ( Yellow is winning in other places I've asked :).

Thinking of shipping the S1-AU Mk1 kits with yellow LEDs - PDP-8/I style - rather than red... What does everybody think?

Soldered together the latest revision this afternoon (number 7!), and thought I'd experiment with my GoPro's timelapse mode.

Here's the second post I wrote for the ARITH-MATIC project: http://arith-matic.com/notebook/the-soul-of-a-new-pcb

Here's an introduction I wrote to the ARITH-MATIC project: http://arith-matic.com/notebook/the-maker-spirit