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Class D Switching Power Amplifiers and Power D/A conversion

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Old 21st March 2013, 09:33 AM   #501
PetruV is offline PetruV  Romania
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What driller motor should i get,more specificaly what apliance has the kind of motor that you would recomend,that one is from a printer
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Old 21st March 2013, 05:13 PM   #502
norazmi is offline norazmi  Malaysia
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more work petruv if u cant get exactly center point to drill, you need to make center point with analog device like classic hand drill just to make center point then start drilling with your motor.
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Old 21st March 2013, 08:47 PM   #503
PetruV is offline PetruV  Romania
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Quote:
Originally Posted by norazmi View Post
more work petruv if u cant get exactly center point to drill, you need to make center point with analog device like classic hand drill just to make center point then start drilling with your motor.
i centered it better
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Old 22nd March 2013, 10:13 AM   #504
PetruV is offline PetruV  Romania
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What matterial do the small caps have to be and what voltage do the electrolitics have to be considering it will be used at 75v
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Old 22nd March 2013, 06:27 PM   #505
norazmi is offline norazmi  Malaysia
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which small cap? For 75vdc, better use 100v cap. For 100n or 0.1uf use non polar caps
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Old 22nd March 2013, 06:47 PM   #506
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For the small caps, use ones made for snubber/decoupling.
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Old 22nd March 2013, 06:55 PM   #507
PetruV is offline PetruV  Romania
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ceramic or film or poliester,

Thanks,but for 90v will 100v caps still be ok
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Old 22nd March 2013, 06:57 PM   #508
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Too small safety margin, for 90V, use 120-150V rated caps.
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Old 22nd March 2013, 07:27 PM   #509
PetruV is offline PetruV  Romania
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ok
but one thing still remains
ceramic or film or poliester for smaller non electolitic caps
Thanks
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Old 22nd March 2013, 07:38 PM   #510
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I'd use X7R ones made for decoupling purposes in 1210 smd package, same ones as chocoholic uses in his system D class d amp.

But i think also WIMA MKT/FKP would work as well.
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