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4hv.org :: Forums :: High Voltage
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Audio mod. flyback question.

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Tigeris
Tue Mar 24 2009, 03:19AM
Tigeris Registered Member #1656 Joined: Wed Aug 27 2008, 03:28PM
Location: Pittsburgh PA
Posts: 53
big5824 wrote ...

what about using an optocoupler to protect the player?


It might sound dumb, but i have a set of speakers for a computer that has a jack in the front. I hooked it up to test it out with my Ipod, and it still works. Though the transistor i had was the wrong one. ( i cant find the right one any were around my area )
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101111
Tue Mar 24 2009, 08:30AM
101111 Registered Member #575 Joined: Sun Mar 11 2007, 04:00AM
Location: Norway
Posts: 263
big5824 wrote ...

what about using an optocoupler to protect the player?

This could work, but then you would need a rather linear, and sensitive optocoupler, you should at last have a opamp to amplify the low voltage audio signal to actually reach a voltage so the optocoupler can start emit light on a analogue scale... Internally..

Or you could use AM modulation....
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Tigeris
Wed Mar 25 2009, 04:30PM
Tigeris Registered Member #1656 Joined: Wed Aug 27 2008, 03:28PM
Location: Pittsburgh PA
Posts: 53
Well i have been gone for a couple days, i tend to work a lot up at my EMS station. But i cant seem to find the IRFP250N MOSFET's on any of my normal parts websites. Am i missing something or typing the wrong part number? If some one could point me in the right way for really cheap, that would be great. (as i dont get paid at my EMS department :P )
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101111
Wed Mar 25 2009, 05:54PM
101111 Registered Member #575 Joined: Sun Mar 11 2007, 04:00AM
Location: Norway
Posts: 263
You could always check ebay...
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