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"https://nzeldes.com/article/wynneroberts/", "published_at": "2025-05-02T18:01:00+00:00" }, { "id": "01a0bde6-2765-73a6-a952-b0832100aa39", "title": "Three “pencil” slide rules", "url": "https://nzeldes.com/article/pencilsliderules/", "published_at": "2025-05-01T18:16:59+00:00" }, { "id": "01a0bde6-2765-73a6-a952-b083217f7389", "title": "Five Intel chips that changed the world", "url": "https://nzeldes.com/article/intelfirsts/", "published_at": "2025-05-01T08:16:09+00:00" }, { "id": "01a0bde6-2765-73a6-a952-b0832275e1ae", "title": "The small Small Calculator", "url": "https://nzeldes.com/article/small/", "published_at": "2025-04-30T14:23:28+00:00" }, { "id": "01a0bde6-2765-73a6-a952-b083236ba462", "title": "Victorian Virtual Reality", "url": "https://nzeldes.com/article/panorama/", "published_at": "2025-04-28T06:37:16+00:00" }, { "id": "01a0bde6-2765-73a6-a952-b083240cf389", "title": "How the Slide Rule got its Cursor", "url": "https://nzeldes.com/article/cursors/", "published_at": "2025-04-27T06:54:10+00:00" }, { "id": "01a0bde6-2765-73a6-a952-b08324929cec", "title": "A homebrew Single Sideband transmitter", "url": "https://nzeldes.com/article/ssb-rig/", "published_at": "2025-04-26T15:49:07+00:00" }, { "id": "01a0bde6-2765-73a6-a952-b083256f74d5", "title": "The gentleman and the carpenter", "url": "https://nzeldes.com/article/jointrules/", "published_at": "2025-04-25T12:38:45+00:00" }, { "id": "01a0bde6-2765-73a6-a952-b08325d90893", "title": "Leib Stern’s slide rule", "url": "https://nzeldes.com/article/stern/", "published_at": "2025-04-24T13:26:57+00:00" }, { "id": "01a0bde6-2765-73a6-a952-b08326c4f2bc", "title": "Krüger’s calculating pencil case", "url": "https://nzeldes.com/article/kruger/", "published_at": "2025-04-24T06:15:22+00:00" }, { "id": "01a0bde6-2765-73a6-a952-b083279ce2e7", "title": "Gunter’s rule", "url": "https://nzeldes.com/article/gunter/", "published_at": "2025-04-23T12:36:53+00:00" } ] posts Claim your blog

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2026

Lessons from building a tongue drum original ↗

15 Sept 2026

War and Peace original ↗

19 Aug 2026

Obsolete media: 35 mm negatives original ↗

28 Jul 2026

Deciphering the “textile” slide rule original ↗

20 Jul 2026

Before Lego original ↗

7 Jul 2026

A tiny spiral slide rule original ↗

2 Jul 2026

It’s all in the holes original ↗

23 Jun 2026

Beads, beads, and more beads!original ↗

13 Jun 2026

A quantum elevator original ↗

1 Jun 2026

Mine!original ↗

22 May 2026

Otis King’s calculator original ↗

4 May 2026

An arithmetical ruler original ↗

24 Apr 2026

Steward’s M.T. Slide rule original ↗

19 Apr 2026

Wonderful chaos original ↗

18 Apr 2026

The Bassett Adder original ↗

20 Mar 2026

Vizzini’s Calculating Table original ↗

27 Feb 2026

A cheater’s slide rule original ↗

21 Feb 2026

Mario Loffredo’s elastic calculating scale original ↗

16 Feb 2026

Other worlds than ours original ↗

14 Feb 2026

Many numbers, little clarity original ↗

4 Feb 2026

Shrinking Megabytes original ↗

13 Jan 2026

A neat innovative thermometer original ↗

3 Jan 2026

2025

The Sliding Gunter original ↗

23 Dec 2025

Smart signage!original ↗

3 Dec 2025

The droll sarcophagi of Peki’in original ↗

28 Nov 2025

Board games go way back!original ↗

21 Nov 2025

Crazy airport cartographers original ↗

18 Nov 2025

Stephenson’s little adder original ↗

10 Nov 2025

Alpina or Curta?original ↗

3 Nov 2025

Wonder Book photos original ↗

29 Oct 2025

A sense of wonder original ↗

12 Oct 2025

Privacy policy original ↗

6 Oct 2025

Small Blue Planet original ↗

1 Oct 2025

Gone with the wind original ↗

28 Sept 2025

Courvoisier’s spiral slide rule original ↗

24 Sept 2025

My take on the Marble Run concept original ↗

15 Sept 2025

The hidden downside of surge protectors original ↗

4 Sept 2025

Welcome Commonsense Design blog!original ↗

3 Sept 2025

Blog original ↗

25 Aug 2025

You did WHAT on a Commodore 64?!original ↗

11 Jun 2025

A new mathematical robot original ↗

10 Jun 2025

Building a Roubo Workbench original ↗

10 Jun 2025

Blue Velvet original ↗

9 Jun 2025

The Fractal Bug original ↗

9 Jun 2025

Sabatini’s magnificent calculator original ↗

9 Jun 2025

Real Bookmarks from True Favorites original ↗

8 Jun 2025

Beautiful Digits original ↗

8 Jun 2025

A medley of Homebrew Projects original ↗

7 Jun 2025

A lovely gauging rule original ↗

7 Jun 2025

The perceptive art of Giuseppe Novello original ↗

6 Jun 2025

A calculator hidden in a book original ↗

6 Jun 2025

Kaufmann’s Posographe original ↗

5 Jun 2025

Growing up in Electronics original ↗

5 Jun 2025

“Iron Felix” meets the Odhner calculator original ↗

4 Jun 2025

Elisha Kally’s water flow calculator original ↗

3 Jun 2025

Slide rules for a new century original ↗

2 Jun 2025

Piercing the unknown original ↗

1 Jun 2025

Humanity’s victory over rust!original ↗

31 May 2025

Meet E. W. Fritchley original ↗

29 May 2025

Sbernadori’s aerophotographical slide rule original ↗

28 May 2025

The Watkins exposure meter original ↗

27 May 2025

The ingenious Ifach adder original ↗

26 May 2025

The weird Logarex Typ-01 original ↗

25 May 2025

The Silver Jubilee Sinclair Sovereign original ↗

24 May 2025

Troncet’s OTHER calculator original ↗

23 May 2025

Heroes and Barbarians original ↗

22 May 2025

Numeri Mundum Regunt original ↗

22 May 2025

The calculation of MADness original ↗

21 May 2025

Oh, no! Can Tesseract save the plane?original ↗

20 May 2025

Chairman Mao’s guidance original ↗

20 May 2025

Build your own airplane!original ↗

19 May 2025

The Professor’s calculator original ↗

18 May 2025

The real thing, in cross-section original ↗

17 May 2025

The Jeffers Calculator original ↗

17 May 2025

The Pose-Marre pen slide rule original ↗

16 May 2025

Bloch’s Gewicht-schnellrechner original ↗

16 May 2025

The Ross Precision Computer original ↗

15 May 2025

Torsion wire delay line memory original ↗

13 May 2025

The Genaille-Lucas financial rods original ↗

12 May 2025

Martin’s huge multiplication table original ↗

11 May 2025

Lalanne’s glass slide rule original ↗

10 May 2025

Jacob Zedak’s wooden slide rule original ↗

9 May 2025

The Data Scaler Proportional Rule original ↗

9 May 2025

The Controller slide rule family original ↗

8 May 2025

Pretty as a picture!original ↗

7 May 2025

Badalamenti’s factorization slide rule original ↗

7 May 2025

Meet a Mathematical Inventor!original ↗

6 May 2025

Lieutenant Brenske’s Marsch-Zirkel original ↗

5 May 2025

A slide rule with a Wow!original ↗

5 May 2025

Wynne-Roberts’ hydraulic calculator original ↗

2 May 2025

Three “pencil” slide rules original ↗

1 May 2025

Five Intel chips that changed the world original ↗

1 May 2025

The small Small Calculator original ↗

30 Apr 2025

Victorian Virtual Reality original ↗

28 Apr 2025

How the Slide Rule got its Cursor original ↗

27 Apr 2025

A homebrew Single Sideband transmitter original ↗

26 Apr 2025

The gentleman and the carpenter original ↗

25 Apr 2025

Leib Stern’s slide rule original ↗

24 Apr 2025

Krüger’s calculating pencil case original ↗

24 Apr 2025

Gunter’s rule original ↗

23 Apr 2025