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Optoisolated gate drive Class D Amplifier

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Experimentonomen
Sat Feb 22 2014, 05:59PM Print
Experimentonomen Registered Member #941 Joined: Sun Aug 05 2007, 10:09AM
Location: in a swedish junk pile
Posts: 497
This is a project i've been doodling around with for a few weeks.

Schematic:
Link2

Output stage under construction:
Link2
Link2
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The prototype:
Link2
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Video of the prototype:
Link2
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This is as fas as i can get at the moment, ran out of solder, have ordered in some more but that wont arrive until maybe tuesday.
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Ben Solon
Mon Feb 24 2014, 12:10AM
Ben Solon Registered Member #3900 Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
Awesome! What do you plan to power with this system? A large PA speaker or something like that? This is a very cool project.
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Experimentonomen
Mon Feb 24 2014, 02:52PM
Experimentonomen Registered Member #941 Joined: Sun Aug 05 2007, 10:09AM
Location: in a swedish junk pile
Posts: 497
In fact i have no use for this amp, nor any speakers that are anywhere close to powerful enough, nor a place that would allow such volumes. This project is purely for fun.
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Sulaiman
Mon Feb 24 2014, 03:35PM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
I guess you could make a small induction heater out of it

driving a fairly large coil allows anything with a small NdFe magnet attached
to become a loudspeaker
can have a musical leaf in your hand etc. kids of all ages love trying different objects/magnets(always 'the big one' first)/distance/orientation .........

fast galvo, .. must be loads of fun stuff ..

you could 'listen' at full power using
1 Ohm or less across an 8 Ohm loudspeaker, in series with your usual dummy load.
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Experimentonomen
Tue Mar 04 2014, 11:04PM
Experimentonomen Registered Member #941 Joined: Sun Aug 05 2007, 10:09AM
Location: in a swedish junk pile
Posts: 497
A tiny bit more has been done:
Link2
Link2
Link2
Link2

A vid:
Link2
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Shrad
Wed Mar 05 2014, 09:31AM
Shrad Registered Member #3215 Joined: Sun Sept 19 2010, 08:42PM
Location:
Posts: 780
hmm it seems a nice project for my 500W woofer sitting in a corner of the room...
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Experimentonomen
Thu Mar 06 2014, 10:45PM
Experimentonomen Registered Member #941 Joined: Sun Aug 05 2007, 10:09AM
Location: in a swedish junk pile
Posts: 497
Atiny bit more:
Link2
Link2
Link2
Link2
Link2
Link2

A video:
Link2
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