Happy Birthday, and variations thereupon

Northackton is 3 years old this month.  The exact week can be derived from reading the first few posts in the archives, and/or by looking at flickr, but I won’t spoil it for you.  To celebrate, Andy had suggested an informal competition to produce devices that play the Happy Birthday tune.

A number of entries were made, and here they are for your enjoyment:
Andy’s recreation of our first attempt to play music bottles with servos.  He authentically captured our discovery that servos aren’t very good at this
 
Andy’s second entry was an Arduino piezoplayer:
  
Adrian made a xylophone using old pinball chime solenoids.  It only had three notes, but it played them really well!
 
Mine was another Arduino player, but with a mini speaker in a little box.  I don’t have any video of it yet, it’ll have to go up in a second post.
However the show was stolen by newcomers Mike and James who came for help making their ring modulator work.  Happily they’d got it almost entirely right, and some slight tweaking and a lot of soldering produced a very special song.
 

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