NNTP-Posting-Date: Thu, 21 Nov 2002 23:40:03 -0600
Subject: Re: Piezo Ignitor to power an LED -- any ideas?
Date: Thu, 21 Nov 2002 21:40:23 -0800
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On Thu, 21 Nov 2002 17:09:08 GMT, email@example.com (John Fields)
>On Thu, 21 Nov 2002 07:00:56 -0800, J81 wrote:
>>I lack hard data on the behavior of a piezo ignitor and what the
>>absolute minimum time period, current, and voltage would be, which is
>>why I bring my question here. Being able to test the output of my
>>piezo ignitor would be extremely helpful.
>Since the output of the igniter is AC, if you rectified its output
>and stored the energy in a capacitor:
>IG>---+---[CR1>]--+--[ | | |
> | [C1] |
> | | |
>you could determine the amount of energy stored using the method
>Chuck Simmons describes:
>"The piezoignitor is a capacitor. If you connect it's output to a
>capacitor, you will get a lower voltage that you might be able to
>measure with a high impedance voltmeter or electrometer. The voltage
>tells you how much energy you have by E=V^2*C where E is energy in
>joules, V is voltage in volts and C is capacitance in farads."
>The down side is you'd have to use some pretty high voltage diodes
>or use some resistance in series with the igniter outputs.
Hm. I didn't know the output was AC. heh. thanks for that bit of info.