level shifters and mosfet drivers

[Eva]

Hi Pafi

Yes, it arrived and it's working fine. Thankyou very much. See...

An externally hosted image should be here but it was not working when we last tested it.

 

[Pafi]

Sorry, OFF

Eva!

You are welcome!
Please tell me your experiences about it detailed! (Maybe in an other topic, where it is ON.) I haven't tried center gapped EE yet.

 

[RX5]

Hello all,

just a quick question.. Is it really a big difference USING air gapped ferrites than iron powder ring??

I have lots of iron powder (colored RED,black,yellow,blue) from many dead PC PS...

AND i got ONLY 1 "ferrite material" E-E core from an epson printer PS..... would this help?

http://i6.photobucket.com/albums/y209/beamrx5/IMG_0020.jpg
http://i6.photobucket.com/albums/y209/beamrx5/IMG_0019.jpg
http://i6.photobucket.com/albums/y209/beamrx5/IMG_0018.jpg

 

[Nixie]

Eh? I think you got it backwards. First figure out the specs you need such as frequency range, loss factor, etc., then choose a core depending on that. A comparison of the most common ferrite and powder cores can be seen for example here:
http://home.woh.rr.com/n8ie/coreinfo.htm

 

[mahirerensan]

I did this circuit.I obtained high difficult from circuit does,but there is one problem;a little parasite and noise.I didn't use feedback and level shifters.levelshifter in IR2113 anyway
I am waiting for your answer

Sorry my english.

An externally hosted image should be here but it was not working when we last tested it.

 

[Tekko]

http://s82.photobucket.com/albums/j256/Tekko_2006/klass d/ 😀 😎

 

[ledmania]

Hey Tekko, you look cute on that pics.😀 .And we have same eyeglasses too😉. So, this is your latest project. Looks good to me. Please update us how it sound..

Regards
ledmania

 

[Tekko]

Leddie, the sound is very good, so good that i have to test the amp on some better speakers than my old ones i had to rebuild that i use as computer speakers. The thing runs on 37 volts for now, which all the others could not do without burning up.

What about you, built your circuit yet ?

 

[ledmania]

So far I'm still in the process of designing a class D amp but for 12V car audio use at the moment. Something is unique about the circuit because this amp will drive a special subwoofer That doesnt exist yet but still under development stage 😉

 

[Tekko]

Make a 0.5ohm subwoofer so you can run the amp directly on 12v 😉😀

 

[ledmania]

Make a 0.5ohm subwoofer so you can run the amp directly on 12v 😉😀

That is exactly I'm trying to do. I'm going to use dual voice coil with few number of turns but more thicker wire to handle more currents.😀

 

[Tekko]

Are you rewinding a car sub as well as making the amp ?

U don´t have MSN, do you ?

 

[ledmania]

Exactly yes. There are plenty of subwoofer parts here like cones,baskets, including voice coils, but I prefer to wind it by myself because of the impedance that I need is too low and I dont like to use several subs in parallel due to space issue and cost.

No, I dont have MSN.

 

[Tekko]

Wheeeeeyyyyyyy 😀 First ever amp to run on its own power supply!!! 😀 😀

42V goes into the amp and no smoke in sight, only clean sound out!!

 

[kASD]

Hi Tekko,

What about your project?? completed or still strucked at somewhere.....😉

K a n w a r

 

[Nixie]

Tekko's not been on the forum since early January.

He used to come to IRC but hasn't been there even longer.

 

[kASD]

Hi Tekko,

I built you circuit this afternoon, the mosfets melted into my breadboard and it caught fire. I don't know what's wrong with it, have more mosfets but no more breadboards. Now I see why you're using a PCB for prototyping. A jamaican told me it was because my air coils are EMI infernos. What core should I use?

Old memories
🙂