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[personal profile] hirez
I have an odd memory of what I think was a tabletop semaphore machine that lived in the attic of Holt Farm, which was where we lived until 1976.

Like most of the the rest of the interesting things in my past, it has been removed by agents of the Ministry for Temporal Affairs, and its like does not appear in the Google for similar reasons.

It seems that for some reason, perhaps to do with the safety of other people, no material trace of things I remember can continue to exist. It's like being in a terrible film.

Anyway. Semaphore machine. The two arms were on a common spindle, each operated by pulleys and a pair of levers close to the base of the device. I can only guess that it had been a teaching device, or perhaps some part of a command-and-control structure for Edwardian assault-pedalos.

It struck me today that it would be an ideal sort of thing to drive via an Arduino. Indeed, someone has already had a similar idea and written the code. However, the other half of the project is missing. I wonder what it would take to hack up an IP-over-semaphore rig? I imagine one would begin by finding some cheap stepper motors...

Date: 2013-03-01 08:33 pm (UTC)
From: [identity profile] jarkman.livejournal.com
Cheap ? Here's cheap:
http://www.ebay.co.uk/itm/5V-Stepper-Motor-28BYJ-48-With-Drive-Test-Module-Board-ULN2003-5-Line-4-Phase-/200712530295?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2ebb662977

Suitably geared, too.

Date: 2013-03-01 08:47 pm (UTC)
From: [identity profile] hirez.livejournal.com
Ha! I'll have forgotten why I wanted them by the time they arrive.

Mind, some more poking shows up several ebay shops of random electronic bits for £cheap.

Date: 2013-03-01 09:56 pm (UTC)
From: [identity profile] jarkman.livejournal.com
The drop-dead-easiest thing is a servo. Less fiddling about than steppers, and still quite cheap.

Date: 2013-03-01 09:44 pm (UTC)
From: [identity profile] quercus.livejournal.com
Oh yes, or as I call those, "fuses".

They're dead good and dead cheap, but they don't half break easily.


In other news, I recently acquired the Big Book Of Optical Telegraph History.

Date: 2013-03-01 11:36 pm (UTC)
From: [identity profile] nemesis-to-go.livejournal.com
I've seen something similar to the device you describe in the Timeball Tower (http://80.168.49.251/website003/visitor_information/heritage_factsheets/the_timeball_tower,_deal.aspx) in Deal.
Edited Date: 2013-03-01 11:36 pm (UTC)

Date: 2013-03-13 08:26 am (UTC)
From: [identity profile] neilh.livejournal.com
You want to wire it up to this:
http://en.wikipedia.org/wiki/File:Optical_telegraph01_4484.jpg

Date: 2013-03-13 07:23 pm (UTC)
From: [identity profile] hirez.livejournal.com
Yes. I believe I do.

3 x 3 matrix is symbolic Marain, surely?

Date: 2013-03-13 07:26 pm (UTC)
From: [identity profile] hirez.livejournal.com
http://www.omniglot.com/writing/marain.htm

Ok. So. Is there a RFC for IP-over-Marain ?

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