While driving home last evening I had a thought cross my mind about models and ignition systems. The lighter on our boiler at home is a pretty coventional piezo crystal (used to have loads of this stuff in the 1960's when Mullards used to make ultrasonic cleaners, they also used EL34 valves in the amplifer stages so they were quite popular!) so I reasoned that it might be possible to construct a Wico EK type of mag with a piece of this stuff and a lump hitting it to produce a spark.
Not as easy as that of course, but does anyone have any relevant info on how many times the stuff will produce a spark ?
For those who don't know the properties of the crystal, it expands and contracts if a voltage is applied across two planes, which was why it was used in the ultrasonic cleaners, an amplified signal was applied across a bank of crystals at a high frequency.
In reverse, if you compress it quickly, it gives out a high voltage, hence its use in expensive lighters and central heating boiler pilot light igniters, and cooker hobs and...
Just a thought and better than the weather.... Kind regards,
Peter Forbes Prepair Ltd Luton, UK email: firstname.lastname@example.org home: email@example.com