BIBURO watch timing software users?

[Av8tor1]

Any users willing to post some DIY for their piezo transducer and preamp?

any advise appreciated, there just doesnt seem to be much info floating around... errr or at least in something besides japanese

I have an ocilliscope and function generator if needed for calibration.

BIBURO (freeware, right click then "save as")

or maybe some DIY methods using an o-scope directly with a piezo pickup

TIA,
Av

[watchmag]

i use this

but 5v from sound card is low you need 9v battery
look like this

[Av8tor1]

watchmag,

Thanks for the print, that's easy enough. I was thinking maybe a 741 op-amp (IIRC)...

How well does the system work for ya? Do you see the need for any low pass and high pass filtering? I have found a couple refs concerning their need. I see the print is calling for sheilded cable.

I did have my Industrial CET journeymans license once upon a time but that was over 20 yrs ago so I'm very, very "rusty".

TIA,
Av

[tomshep]

741 is much too noisy and low impedance for this. I use a cut down guitar pickup and a transistor circuit with a FET front end. Let me know your address, and I'll send you a sketch. Meanwhile, I'd like to try Biburo but I can't make it work here in the UK. Update: your link worked and it looks like a good program. I wonder what to do about the reference oscillator for calibration. (PCs are useless at this). Out with the felt tip pen then (I'm hopeless at drawing on the computer!)

[tomshep]

Using a 'scope is not really an option unless you are using a modern DSO . The timebase is simply not accurate enough. The usual approach is to use a crystal derived square wave, triggered off the tick but it is somewhat hit and miss. There is a good circuit for a piezo pickup preamp here,

www.scotthelmke.com/Mint-box-buffer.html

and plundering this will take you most of the way. A simple audio preamp kit with a gain of 10-100 from your local hobby electronics vendor should pump that up to your computer's input level.

Hint: build it in a well screened box. Piezo transducers and their amplifiers are so noise sensitive that mains hum on the signal will throw the timing right out. How do I know? Lots of prototypes!

[Av8tor1]

outstanding!!

Ill PM you my addy, and TIA


Av

[watchmag]

http://s697.photobucket.com/albums/v...t=P2180487.flv
BIBURO sound

[watchmag]

http://www.flynwill.com/Watches/CheapTiming/

[Av8tor1]

excellent, very informational thread :)

[Pawl_Buster]

Any users willing to post some DIY for their piezo transducer and preamp?

any advise appreciated, there just doesnt seem to be much info floating around... errr or at least in something besides japanese

I have an ocilliscope and function generator if needed for calibration.

BIBURO (freeware, right click then "save as")

or maybe some DIY methods using an o-scope directly with a piezo pickup

TIA,
Av

The site and ZIP file are inaccessible
Anyone want to e-mail me the file?