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Old 06-06-2012, 12:50 AM #833
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Sounds great I wouldnt be able to tell ya a thing... but I am interested in seeing your results.


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Old 06-06-2012, 05:41 AM #834
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Congrats on your scope Tom,

Post some results when you are able to,

I wish your scope a very long and good service to you and possibly to someone who needs your help

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Old 06-06-2012, 08:56 AM #835
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by foulmist View Post
Congrats on your scope Tom,

Post some results when you are able to,

I wish your scope a very long and good service to you and possibly to someone who needs your help

Wow, you make it sound like a rite of passage. Do I need to give a speech?

So far I tried sticking my probe in the headphone jack of my iphone while playing blink182. I need to do some more reading I think.
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Old 06-06-2012, 09:29 AM #836
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by tsteele93 View Post

So far I tried sticking my probe in the headphone jack of my iphone while playing blink182. I need to do some more reading I think.
What do you expect ? You really want to see a video clip on the screen of the oscilloscope ?
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Old 06-06-2012, 09:57 AM #837
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by tsteele93 View Post

So far I tried sticking my probe in the headphone jack of my iphone while playing blink182. I need to do some more reading I think.
A LOT more reading. I suggest you start with a copy of Rolling Stone, then SPIN, Blender, and NME. Hopefully that will fix the major issue ;p
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Old 06-06-2012, 02:17 PM #838
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

You guys are funny. So Blord, you are saying it won't show the video. Probably some MTV DRM thing! I was hoping to at least see a cool eq/windows media player type graphic with peaks on the bass drum beats or something. Of course I forgot to even activate the headphone jack so that was a problem as well...

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Old 06-06-2012, 02:34 PM #839
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

You need to be careful though Tom.

I accidentally killed one of my channels on my iPhone a while ago while scoping the output. I seemed to have shorted one of the channels out, and thus it blew out.

It's still under warrenty so I got a new one. Just take heed and make sure nothing touches in naughty ways
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Old 06-06-2012, 10:49 PM #840
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

I think that I'll quit that then. I buy my phones outright because I have a work arrangement for free cell service. So I don't want to trash a phone that will cost me ~$600 to replace... Although I have been wanting to move from 4 to 4S?

Thanks for the advice!
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Old 06-06-2012, 10:50 PM #841
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by tsteele93 View Post
I think that I'll quit that then. I buy my phones outright because I have a work arrangement for free cell service. So I don't want to trash a phone that will cost me ~$600 to replace... Although I have been wanting to move from 4 to 4S?

Thanks for the advice!
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Old 06-07-2012, 05:03 PM #842
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Ok, interesting update. I pulled out one of my Mohrenberg Benboosts labeled 537mA.

I put it on the Jufran test load and set my DC power supply to 8.1 volts. I checked it with my multimeter and it said I was getting 8.21 volts.

I set the test load to 6 diodes based on this post under the assumption that I would be powering a 12x diode with the driver.

I then hooked the power supply to the driver and the PSU immediately dropped from 8.1v indicated to about 6.4v indicated. Nothing I did (aka turning up the voltage) changed that number.

Then I put my voltmeter across the test load and got about 740mV, which was within 10% or so of the ~755mA the PSU said it was putting out. Odd!

At this point I was wondering if the set resistors were right.

Here is a crappy iPhone / aixiz acrylic macro shot,


Benboost troubleshoot by tsteele93, on Flickr

You can see where I beat it up trying to measure the resistance with my multimeter.

Using my handy electronic toolbox app on iPad/iPhone, I checked the resistance assuming that those are 0.62Ω and 0.82Ω


Electronic Toolbox by tsteele93, on Flickr

So we get 0.3531Ω = .538A so they look to be correct.

That leads me to wonder why WAS (I ended up killing it physically, I tried reading the resistance with my meter and accidentally slipped and ended up cracking the inductor.) the Benboost apparently putting out ~750mA?

That alone could kill a 12x diode.

All of this assume that I was doing any of this correctly.

If I wasn't, then please help me out.

Also. I have asked this elsewhere, but how do I scope the output. I understand I cannot measure current with the oscilloscope, but I assume if I put it on a test load I should be able to measure voltage in a way that would show me current?

Thanks for any advice, thoughts or polite suggestions.
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Old 06-07-2012, 05:14 PM #843
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Quote:
Originally Posted by tsteele93 View Post
set my DC power supply to 8.1 volts
From opening post.
Quote:
So this is a boost driver based on the lm3410. Single li-ion or 2x/3x alkaline/nimh ONLY.
Do you know the Ben Boost drivers are designed for one 3.7V cell ?
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Old 06-07-2012, 05:17 PM #844
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Are you saying your input to the driver was 8.1v? There's your problem!

Electronic toolbox is awesome btw.
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Old 06-07-2012, 05:54 PM #845
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

This is a boost driver Tom,

why the input is 8.1V O.o it should be 4.2 or 3.6V or something like that in order to boost it to the 6V+ the 12x requires
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Old 06-07-2012, 07:59 PM #846
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

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Originally Posted by tsteele93 View Post
Ok, interesting update. I pulled out one of my Mohrenberg Benboosts labeled 537mA.

I put it on the Jufran test load and set my DC power supply to 8.1 volts. I checked it with my multimeter and it said I was getting 8.21 volts.
EDIT: Firehost is giving me multiple errors, so I can't seem to post what I want to post. But what I was going to say, was that this is another example of people suggesting that there's something wrong with the driver, when really it's just really basic/fundamental user error. People need to stop blaming their equipment and components for everything.
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Last edited by rhd; 06-07-2012 at 08:13 PM.
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Old 06-07-2012, 08:14 PM #847
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

Brainfart. Yes I know that. Yes I overlooked it. Thanks for reminding me.

Sometimes I hate to even ask for help fearing that I will be pounced on for even the simplest mistake. Glad to see that is not the case.

I will give it another go at 4 volts.
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Old 06-07-2012, 08:20 PM #848
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Default Re: FREE DIY open source BOOST driver!!! Tested & working!!

I imagine that driver is damaged by now. You should at least swap the lm3410 chip first.
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