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DIY & Tutorials
DIY For Audio
The ultimate speaker protection system
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<blockquote data-quote="tangmonster" data-source="post: 579484" data-attributes="member: 1581"><p>my :2c:</p><p></p><p>I would use a microprocessor measuring Analog voltage on output with a low pass filter connected to it. </p><p></p><p>Even safer and simpler. you get VERY nice " analog RMS chips which calculates RMS voltage up to a few mh'z . Thus you can very easily trigger for High frequency oscillations.</p><p></p><p>If output voltage higher than xVolts for x amount of seconds switch of relay powering Mains input to Transformer.</p><p></p><p>Thus no fuses switching needed on high current voltage rails.</p><p></p><p>rms to voltage converter:</p><p></p><p>http://za.rs-online.com/web/p/ac-dc-converters/0195149/</p><p></p><p>you'd have to combine that with another circuit that check for dc offset also ...</p><p></p><p></p><p>P.S.</p><p></p><p>also combine with that a mosfet connected accros the Main capacitors. So including removing Primary 220V , short out caps so caps unload into this protection device rather than speakers after mains is disconnected.</p></blockquote><p></p>
[QUOTE="tangmonster, post: 579484, member: 1581"] my :2c: I would use a microprocessor measuring Analog voltage on output with a low pass filter connected to it. Even safer and simpler. you get VERY nice " analog RMS chips which calculates RMS voltage up to a few mh'z . Thus you can very easily trigger for High frequency oscillations. If output voltage higher than xVolts for x amount of seconds switch of relay powering Mains input to Transformer. Thus no fuses switching needed on high current voltage rails. rms to voltage converter: http://za.rs-online.com/web/p/ac-dc-converters/0195149/ you'd have to combine that with another circuit that check for dc offset also ... P.S. also combine with that a mosfet connected accros the Main capacitors. So including removing Primary 220V , short out caps so caps unload into this protection device rather than speakers after mains is disconnected. [/QUOTE]
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DIY & Tutorials
DIY For Audio
The ultimate speaker protection system
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