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Author Topic: Agentgates´s TPU setup with strange wavehill hump  (Read 341238 times)

hartiberlin

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #270 on: January 10, 2010, 02:21:26 AM »
Luc,
it is 25 frames/sec in Europe,
but 23,976 is for cinema movies only
taken (shot) with old real film cameras.

For NTSC DV video source (interlaced TV video) keep 29.97 frames/sec,
if you are in a PAL country like Europe keep 25 frames/sec.

Keep the original video frame size like
720x480 for NTSC or 720x576 for PAL
and better go with about 5000 to 8000 KBits/sec for
the videobitrate.
Then the video will be much clearer...
Youtube will Re-encode it anyway again to FLV format with
their own settings, so it is important to upload the video already
with a high quality.
Many thanks.
Looking to see the real deal.
Regards, Stefan.

gotoluc

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #271 on: January 10, 2010, 02:33:32 AM »
320x240 is pretty low resolution even for youtube, I would upload at least 640x360/ 640x480.  Of course if your source is lower than that it won't even matter.


Man just send me the video, I'll have it uploaded in 2 minutes. :p

I've been doing this for a while. From what I understand when I researched it a while back is Youtube will convert it to 320 x 240 so it's best to send it in a format that minimum re-encoding will occur on their side. Their audio is also 22050

No point in uploading a huge file that will end up being re-encoded to something much smaller. Saves much time on uploading and bandwidth ;D

Luc

gotoluc

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #272 on: January 10, 2010, 02:40:21 AM »
Luc,
it is 25 frames/sec in Europe,
but 23,976 is for cinema movies only
taken (shot) with old real film cameras.

For NTSC DV video source (interlaced TV video) keep 29.97 frames/sec,
if you are in a PAL country like Europe keep 25 frames/sec.

Keep the original video frame size like
720x480 for NTSC or 720x576 for PAL
and better go with about 5000 to 8000 KBits/sec for
the videobitrate.
Then the video will be much clearer...
Youtube will Re-encode it anyway again to FLV format with
their own settings, so it is important to upload the video already
with a high quality.
Many thanks.
Looking to see the real deal.
Regards, Stefan.

Sorry Stefan but that is not correct!  I know, I use to work in multi standard video and Pal video is 23,976 frames/sec... it is Film that is 25 frames/sec world wide.

I've also experimented in uploading high quality files to Youtube and it comes to the same quality as my recommendation except for the fact of wasting much time uploading and huge bandwidth use.

Is there a lack of quality in my video's?

Try it for yourself and see if you can see a difference.

Luc

broli

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #273 on: January 10, 2010, 02:47:39 AM »

I've also experimented in uploading high quality files to Youtube and it comes to the same quality as my recommendation except for the fact of wasting much time uploading and huge bandwidth use.


I don't know when you did that but youtube supports an array of resolutions, so it does matter in what resolution you upload. It can go from standard to Full HD:

http://en.wikipedia.org/wiki/YouTube#Quality_and_codecs

gotoluc

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #274 on: January 10, 2010, 03:12:50 AM »
I don't know when you did that but youtube supports an array of resolutions, so it does matter in what resolution you upload. It can go from standard to Full HD:

http://en.wikipedia.org/wiki/YouTube#Quality_and_codecs

Yes Broli I know they have recently offered better resolutions but why choose these for a demo.

Best to not waste huge amounts of time for a quality that most will not notice the difference. I always stayed with there standard video specs as stated by wikipedia.
Quality and codecs

YouTube originally offered videos at only one quality level, but now has a range of quality levels as well as a format for viewing on mobile phones. The original format displayed videos at a resolution of 320x240 pixels using the H.263 Sorenson Spark codec, with mono MP3 audio

Have you or anyone else here uploaded 2Gig video file size just for a demo? Is there a video quality problem in my videos that I'm not aware of?

Can we stop this nonsense and just get the job done?

Luc

downunder

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #275 on: January 10, 2010, 04:27:53 AM »
Sorry Stefan but that is not correct!  I know, I use to work in multi standard video and Pal video is 23,976 frames/sec... it is Film that is 25 frames/sec world wide.

I've also experimented in uploading high quality files to Youtube and it comes to the same quality as my recommendation except for the fact of wasting much time uploading and huge bandwidth use.

Is there a lack of quality in my video's?

Try it for yourself and see if you can see a difference.

Luc

Hi gotoluc

I'm afraid Stefan is correct and you must be getting PAL and Film framerates confused.  Please check these links for confirmation.

http://en.wikipedia.org/wiki/PAL
"The majority of countries using PAL have television standards with 625 lines and 25 frames per second"

http://en.wikipedia.org/wiki/Frame_rate
"The 24p frame rate is also a noninterlaced format, and is now widely adopted by those planning on transferring a video signal to film. But film- and video-makers turn to 24p for the "cine"-look even if their productions are not going to be transferred to film, simply because of the "look" of the frame rate. When transferred to NTSC television, the rate is effectively slowed to 23.976 frame/s, and when transferred to PAL or SECAM it is sped up to 25 frame/s. 35 mm movie cameras use a standard exposure rate of 24 frames per second, though many cameras offer rates of 23.976 frame/s for NTSC television and 25 frame/s for PAL/SECAM. The 24 frame/s rate became the de facto standard for sound motion pictures in the mid-1920s."

ketone

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #276 on: January 10, 2010, 05:27:14 AM »
I am making slits for the first of the three primary windings, by the time i make slits for the other two primaries, the spacing will end up around 2.5 mm between primaries? That is about as much as my big fingers can handle, Anyone getting closer spacing between primaries?



update: completed primary1...two more to go!
« Last Edit: January 10, 2010, 11:12:06 AM by ketone »

gotoluc

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #277 on: January 10, 2010, 07:04:39 AM »
Hi gotoluc

I'm afraid Stefan is correct and you must be getting PAL and Film framerates confused.  Please check these links for confirmation.

http://en.wikipedia.org/wiki/PAL
"The majority of countries using PAL have television standards with 625 lines and 25 frames per second"

http://en.wikipedia.org/wiki/Frame_rate
"The 24p frame rate is also a noninterlaced format, and is now widely adopted by those planning on transferring a video signal to film. But film- and video-makers turn to 24p for the "cine"-look even if their productions are not going to be transferred to film, simply because of the "look" of the frame rate. When transferred to NTSC television, the rate is effectively slowed to 23.976 frame/s, and when transferred to PAL or SECAM it is sped up to 25 frame/s. 35 mm movie cameras use a standard exposure rate of 24 frames per second, though many cameras offer rates of 23.976 frame/s for NTSC television and 25 frame/s for PAL/SECAM. The 24 frame/s rate became the de facto standard for sound motion pictures in the mid-1920s."

Yes downunder!  that is correct!... I knew that film was an even number of frames and 23.976 was a video frame rate and not film (motion pictures) in its original world standard frame rate. I guess that's what I was trying to get through. Thank you for clearing it up ;)

Sorry Stefan for the mix up.

Luc

Mk1

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #278 on: January 10, 2010, 10:45:15 AM »
@all

I made one with a jt circuit 18 turns , with a secondary of 4 turns , i get 4.5 volt once rectified leds light on it , due to the design i made i get AC but if you really can get true DC from it i will.

Btw i used a 15/75 degree , 2n2222 transistor and 300 ohm pot , 1.5 v aa...

There is interesting stuff happening , i am surprised to even get anything from the secondary...

Mark

Super God

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #279 on: January 10, 2010, 11:55:40 AM »
I am making slits for the first of the three primary windings, by the time i make slits for the other two primaries, the spacing will end up around 2.5 mm between primaries? That is about as much as my big fingers can handle, Anyone getting closer spacing between primaries?



update: completed primary1...two more to go!

WOW!  Nice coil!  Keep up the amazing work!

agentgates

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #280 on: January 10, 2010, 12:12:14 PM »
@Lindsay

Something i not right there. The IGBTs shouldn't be vital.

This is my configuration with the 80mm mailing tube for ONE primary coil:

10 degrees gap between each primary. 0.19mm thin wire. (I tried it up to 0.38mm, worked)
9 turns of the secondary. (0.74mm)

Drive it with low freq. This configuration will give you the nice high current exponential spikes I mentioned. Please DO use current limiter resistor. My latest coil has 0.19mm for primary and a single 15 ohms current limiter for the source.

If you want to light a bulb with ONE primary you will need to go higher with the output voltage, otherwise you will need the minimum 3 primary. My first design was running on 500V spikes, smoothed a bit with LC and went in the next TPU. The next stage went to 800V spikes, smoothing again with LC and the bulb. (this is bad, and the current design will run with one TPU without LC)

The PRESENT design:

0.19mm primary coils. Altogether 3 primary wound on the acrylic tube in the same manner. 45 degrees angle to the centreline and 10 degrees between the same primary coil. Each primary coil has 3.33 degrees offset to the previous one.

Some photos of the present design:

http://www.samsonium.org/sites/default/files/P1100273.JPG
http://www.samsonium.org/sites/default/files/P1070270.JPG

Incoming signal on 2 channels with overlapping, but if you use 4017 the next things still should work. (please ignore the falling edge that is corrected by 3x 1Mohm pulldown, just focus on the delay between the channels and the duty cycle 50%)
http://www.samsonium.org/sites/default/files/P1080272.JPG

http://www.samsonium.org/sites/default/files/P1100276.JPG
http://www.samsonium.org/sites/default/files/P1100277.JPG

Lock the scope trigger on the output, slowly increase the input and watch the scope signal on the output with the growing hump:
http://www.samsonium.org/sites/default/files/P1100278.JPG
http://www.samsonium.org/sites/default/files/P1100279.JPG

My zero line is the red marker on the left.

This is RAPIDLY happenning as you are slowly increasing the input:
http://www.samsonium.org/sites/default/files/P1100280.JPG
http://www.samsonium.org/sites/default/files/P1100281.JPG

The 2 more humps will appear to the left and right. This the correct signal. The current should rapidly fall back on the input side as they jump out.

BUT, If you receive something like this:
http://www.samsonium.org/sites/default/files/P1060254.JPG

then your winding is incorrect.

Please see the winding on the current coil. One coil:
http://www.samsonium.org/sites/default/files/P1070265.JPG

2 coils:
http://www.samsonium.org/sites/default/files/P1070267.JPG


and 3 coils ready:
http://www.samsonium.org/sites/default/files/P1070270.JPG

@ketone

Your coil is very nice! Please make sure you will set the resistance with a current limiter resistor to 20ohm in series. Probably a 18ohms 5W resistor or 22ohms. You will see it.

Thanks for the advices to everyone on youtube-hell-format. :) I will look into it as I screwd up a half day with coding yesterday.

UPDATE1

Ignore the 3 huge IGBTs as it is voltage driven now. Later I will use darlingtons or a single darlington array.

UPDATE2

I have forgotten the most important. There is a single secondary on it right now. Presently waiting for Stefan's reply on the 2x200V

http://www.samsonium.org/sites/default/files/P1100282.JPG
« Last Edit: January 10, 2010, 02:58:42 PM by agentgates »

teslaalset

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #281 on: January 10, 2010, 12:27:36 PM »
@ Tony,

A quick question:
What type of powerFET drivers are you using?
(I use MC 34151 for the moment)

B.t.w. you called it Current design, which is kind of confusing.
You probably ment Present
Apart from that this design is voltage driven i.s.o. current driven.

Thanks for the new details!

agentgates

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #282 on: January 10, 2010, 12:36:28 PM »
@ Tony,

A quick question:
What type of powerFET drivers are you using.
(I currently use MC 34151)

B.t.w. you called it Current design, which is kind of confusing.
You probably ment present in such that this design is voltage driven i.s.o. current driven.

TC426CPA unfortunatelly inverting but don't let it to confuse you, just use a normal non-inverting one. BTW they are rubbish, very sensitive for ESD. I found them in the drawer. My favourite FET drivers are coming on the next week (hopefully) as we have heavy snowing and other problems right now.

lol @ current/present. yes you are right, I fix it. ;)

agentgates

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #283 on: January 10, 2010, 12:43:17 PM »
@Stefan

Do you want an inverter on it? As if you do please let me know it now and I'll wind the secondary for 2x200V on your coil.
« Last Edit: January 10, 2010, 01:50:47 PM by agentgates »

Mannix

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Re: Agentgates´s TPU setup with strange wavehill hump
« Reply #284 on: January 10, 2010, 01:23:59 PM »
Thanks tony!

You have made it clear,  nice coil  beautifil in fact.. hope you dont melt it!

I wonder if being in the southern hemisphere I may  need to wind the primary in reverse direction, just something that Steven said once.

just let me know if they work both ways for you and ill leave that out of the equasion

I will wind another on a bigger spool like you have done to make things easier to handle, fine wire .

Currenty using .25mm on the 80mm spool the out put 5 turns 1mm wire taped down resonably firm 10mm gap between secondary 9mm between primary.. relying on the wire coating for seperation between primary and secondary





I will perservere using your guidance.. we have almost the exact same lvdc power supplies
thank you for the concise descriptions.

lindsay