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Subject: Re: Piezo switch

Date: 07/28/02 at 12:49 PM
Posted by: Brian Snell
E-mail: bsnell@lara.on.ca
Message Posted:

In Reply to: Re: Piezo switch posted by JOHN on 07/28/02 at 2:45 AM:

Hello again. Your reference to an electric lighter switch is puzzling to me. Do you want to replace a faulty switch ?
Do you want to use a lighter switch for something else ?
Do you want to light an electric lighter using a regular switch?

The switches used in these lighters employ a piezo element. This is arranged in such a way that when a spring-loaded mechanism is toggled, the mechanical energy stored in compressed spring is suddenly released and the piezo element is sharply stressed -- developing a short voltage spike. Different lighters employ variations in using this spike to generate a short high voltage "spark" which lights the butane gas jet. Some piezos have a "step up" ignition coil, some seem to be able to operate without any coil -- a process which I do not fully understand. Whatever system used, the initial mechanical energy providing the spark comes from the operator's thumb depressing the igniter button down until the toggle-release point is reached. How this could be adapted for other uses is an odd question, as the "cause and effect" of the switch is fairly obvious. I ask, once again, if you would provide more details as to what you want to do, the reply process would be more effective.

BS


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