Piezo igniter output waveform - piezo sparker.pdf
 

These are from a Zippo barbecue lighter, with the load being 1000
Megohms; a Fluke 80k-40 driving a 10 Megohm scope probe.

So, the voltages are 1000X indicated!

I posted the best responses, many of the others were mundane.

The damped oscillations are interesting, and being as constant as they
are from hit to hit I suspect there's a mechanical resonance in the
igniter structure which is squeezing and stretching the piezo after the
hammer hits it.


JF

Piezo igniter output waveform - piezo sparker.pdf
 

On Mon, 22 Sep 2008 10:54:17 -0500, John Fields
wrote:

These are from a Zippo barbecue lighter, with the load being 1000
Megohms; a Fluke 80k-40 driving a 10 Megohm scope probe.

So, the voltages are 1000X indicated!

I posted the best responses, many of the others were mundane.

The damped oscillations are interesting, and being as constant as they
are from hit to hit I suspect there's a mechanical resonance in the
igniter structure which is squeezing and stretching the piezo after the
hammer hits it.


JF

Several of my built-in ones have died this past summer (after 10
years), I'm guessing from the heat. Fortunately they seem to be a
standard size snap-in item in this town ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine Sometimes I even put it in the food