Series 1 - Arithmetic Unit
The S1-AU PCB

What is an arithmetic unit?

An arithmetic unit enables computers to perform binary arithmetic. It is one of the most important parts of a CPU (Central Processing Unit). An arithmetic unit which also performs bitwise logical operations is commonly referred to as an ALU (Arithmetic Logic Unit).

Introducing the ARITH-MATIC S1-AU Mk1:

The S1-AU Mk1 is a beautifully crafted DIY electronic kit designed with classic 7400 series logic chips.

It is not only a fun and rewarding soldering exercise enabling you to build a simple 4-bit arithmetic unit, but also a practical introduction to the simple binary operations that are hidden away in opaqueness of modern computer architectures.

Using 74HC173 registers for temporary data storage, a 74HC283 full adder for binary calculations, and a 74HC85 comparator for logical comparisons, the assembled board will enable you to perform 4-bit addition, subtraction, accumulation and comparison.

The S1-AU Mk1 operates through tactile interactions using a carefully designed array of push button switches, and binary operations can be visually traced through a series of on-board ultra bright LEDs. The S1-AU Mk1 is powered via a USB mini cable, so you don't need to rely on batteries.

The kit is a pragmatic introduction to computational hardware for computing enthusiasts, hobbyists and makers.

Performing 4-bit accumulation with the S1-AU Mk1

The S1-AU Mk1 is recommended for ages 16+ and some soldering experience is required to construct the kit.

"Really, really insanely nice - I've been assembling PCB kits for about a decade from the likes of Adafruit and EMSL, and you've blown them out the water... Genuinely the classiest kit I've handled." - @IrregularShed, UK

S1-AU Mk1 Kit Contents

The kit contains all the through-hole electronic components you’ll need to build your own 4-bit arithmetic unit and includes:

  • S1-AU Mk1 Mainboard PCB (100mm x 162mm)
  • Backplate PCB (with screws and nuts for mounting)
  • Electronic Components Kit
  • USB Mini Cable (for power only)
  • Operator's Technical Manual (downloadable .pdf - English language only)
Kit contents of the S1-AU Mk1
The S1-AU Mk1 DIY Electronic Kit

The kit is supplied with our 'Operator's Technical Manual' (as a downloadable .pdf - English language only) which describes in detail what the arithmetic unit is and how ALUs are used more generally in computational architecture. The manual also explains how to fully construct and operate the S1-AU Mk1 and gives a primer on binary operations (addition, subtraction & twos complement) for those who may not be familiar with binary arithmetic. Our mainboard PCB has been carefully crafted to complement the manual and aid construction.

For a fun and rewarding soldering experience, why not dust off the soldering iron and order your very own S1-AU Mk1 today?

S1-AU Mk1

RRP £49.95
Price £44.95 (10% OFF)

Shipping to UK / EU / US only.

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