Thanks for posting the pics. It's amazing how much manual work was involved
in building older equipment, such as this unit. Even the PCBs have
additional manual wiring.
I was curious about the innards, particularly about what would be
salvageable if you decide to make a clock out of it.
As
https://lh3.googleusercontent.com/-ySnV-4VMs6g/VRqcFmxFb2I/ADk/6nS844rLd_s/s1600/IMG_0382.JPG
https://lh3.googleusercontent.com/-j7DgcEFOFOo/VRqcNaWygSI/ADs/HfIofUKkjxo/s1600/IMG_0383.JPG
Not too sure I agree with this, A digital read out is a very standard and
common piece of kit - and probably more useful than an aging and out of cal
voltmeter since its just a counter without an oscillator - nothing to
calibrate. Any modern encoder with greycode / quadrature output will plug
While I generally agree with minimally invasive, I don't on this piece of
gear. This is an obscure display unit for a very obsolete piece of
equipment. The odds of anyone ever needing it again to serve it's original
purpose are extremely slim to none. Unlike a voltmeter or other piece of
Looks like it's from a CMM. Had a similar unit at last employer. Lost track
of it 25 years ago when they upgraded to LED units.
On Monday, March 23, 2015 at 9:39:28 PM UTC-5, Kerry Borgne wrote:
I agree with the minimally invasive route. Is this a digital caliper of
some sort? In which case there would have been a device plugged into that
input with which to do the measuring. If you have that and it works then a
physical representation of the time is a neat idea, if you can drive it
with
That will almost certainly take a quadrature input from a encoder and
increment / decrement from that, so you could make a circuit to pulse it up
and down to simulate time without modifying it at all. That would be a
challenge at least. The Quadrature input will almost certainly give +5v and
Alarm clock. Use the thumbwheel switches to set the alarm time; 6 tubes
gives hours/minutes/seconds.
Nice find! Could you post a picture of the internals ? My guess is you
would scrap all of the internal circuitry, except the transformer.
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