16 Jun
2005
16 Jun
'05
7:29 p.m.
Tony Duell wrote:
As is the FIFO (again, it was there when I went, which was some years
ago). They looked to be complete, and wired up, but alas they were not
operational when I visited the museum.
Since, unlike the Science Museum, the London Transport Museum charges an
entrance fee, I've not been recently.
Said books also contain a description of a lovely
electromechanical FIFO
system used to store train descriptors on the London Underground (and its
associated binary to 1-of-n decoder) ...
You can see the 1-of-n decoder in the London Transport museum
in Covent Gardern. At least, you could last time I went there,
once again it was some years ago. Anyone been there recently?
The actual decoder, BTW, is all done in massive brass, copper and
Bakelite. It's a form of relay logic, I suppose.
Not Bakelite (it's earlier than that). I thought the base looked to be
marble, or comething like that. And yes, it's the standard relay-logic
decoder tree. I have the schematics, etc, in that book I mentioned.
-tony