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I want to make a 1MHz ultrasonic generator with output in pulse or continuous form as well as high intensity. I got one circuit board of a scrap physiotherapy equipment. It basically consists of a 2 BU508 transistor and triac circuit to control power.

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This question is too broad in its current form. What specifically are you asking about? – Olin Lathrop Apr 1 '12 at 17:04
Can you try to extract a schematic from your board and edit this picture into your question? Also, a photo of your board might give us some better information. – zebonaut Jul 10 '12 at 13:12
@zebonaut - he can't hear you. Came back a week after asking, but not since. I vote to close. – stevenvh Jul 10 '12 at 13:55

closed as not a real question by Anindo Ghosh, rawbrawb, Brian Carlton, Nick Alexeev, zebonaut Jan 23 at 21:24

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, see the FAQ.

2 Answers

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the BU508 is a low (6~30)current gain 700V NPN power transistor that is great for high voltage oscillators. Piezo devices have a maximum power dissipation spec so find out what it is.

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Some relevant information may be found in this answer.

The frequency is much lower than 1 MHz, but since you're talking about physiotherapy equipment, it may still fit your needs.

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