I am bored out of my skull. I have decided to bring up various topic some people might find interesting.
I have had stroke
Today I'll talk about quartz. A truly remarkable material Quartz generate an electric field when put under pressure.It is a natural transducer. The little spark in a lighter when you click is a result of small spring loaded hammer slapping a small piece of quartz.The property is called piezoelectric. and used in every thing from earphones to crystal oscillators. Indeed it is the crystal in crystal oscillator.One of the early schematics I learned when I was first starting out looked some thing like this. Now I don't like the bias scheme but it works.I used ia CB (27Mhz) crystal and a 2N2222. One of my favorite transistors. The design puzzles me a little because the crystal has to invert the signal to work. A crystal is a complex mix of series resonant characteristic and a parallel LC circuit equivalent.
I have had stroke
Today I'll talk about quartz. A truly remarkable material Quartz generate an electric field when put under pressure.It is a natural transducer. The little spark in a lighter when you click is a result of small spring loaded hammer slapping a small piece of quartz.The property is called piezoelectric. and used in every thing from earphones to crystal oscillators. Indeed it is the crystal in crystal oscillator.One of the early schematics I learned when I was first starting out looked some thing like this. Now I don't like the bias scheme but it works.I used ia CB (27Mhz) crystal and a 2N2222. One of my favorite transistors. The design puzzles me a little because the crystal has to invert the signal to work. A crystal is a complex mix of series resonant characteristic and a parallel LC circuit equivalent.
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