[time-nuts] more teensies

Jim Lux jimlux at earthlink.net
Fri Sep 25 18:40:25 UTC 2015


I ran 5 teensys in parallel, driven from the same Rb source for an hour..
They track reasonably well.
The differences are probably due to where they are relative to their 
neighbors, and where the AC is blowing in my office.  They're all on a 
single piece of perfboard side by side.  I'll find a cardboard box and 
some foam to put them in.  (excuse me.. an isothermal atmospheric 
convection current inhibition system)

There's a pretty noticeable "turn on" transient, so I should probably 
wait a few minutes before taking data..

They're actually run off a 16 MHz crystal, which is presumably 
multiplied up by 4 internally.
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