On 07/03/2012 23:24, Cobra007 wrote:
Nice clock Grahame! I like the barcode time as well, did you actually
check if a CCD barcode reader can decode it?
No, it's just to annoy people and, in particular, one (non-electronics)
friend of mine. If I add other clock faces (Lucky Dave suggested
pingpong game which I'm putting in at the moment) then the barcode would
be one of the first to go when I've stuffed the mega full.
At first I was wondering why you use such large capacitors (100uF/
100V) for the voltage multipliers but then I saw you use the mains
frequency as input source, so that makes sense.
I have to admit I like those voltage multipliers; they take more space
than other solutions but have no semiconductors to let the magic smoke
out of. The equations for selecting capacitor values, number of stages
etc for a given supply voltage/current/ripple are simple to understand
and use as well.
Some form of a brass bezel around the tube would be a nice finish I
think.
I very much agree - time to source a chunk of brass and get it turned.
The far end of the tube has a turned tufnol plug so I might replace that
with a brass one now as well.
Cheers Grahame
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