FREE DIY open source BOOST driver!!! Tested & working!!

[Kizdawg]

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

 

[foulmist]

Congrats on your scope Tom, :beer:

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

:beer:

 

[tsteele93]

Congrats on your scope Tom, :beer:

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

:beer:

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.

 

[Blord]

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 ?

 

[rhd]

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

 

[tsteele93]

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...

 

[Hiemal]

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 :eg:

 

[tsteele93]

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? :eg:

Thanks for the advice!

 

[AnthoT]

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? :eg:

Thanks for the advice!

Don't destroy your 4 yet.... The 5 is coming

 

[tsteele93]

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. :crackup:

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.

 

[Blord]

set my DC power supply to 8.1 volts

From opening post.

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 ?

 

[benmwv]

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

Electronic toolbox is awesome btw.

 

[foulmist]

This is a boost driver Tom,

why the input is 8.1V it should be 4.2 or 3.6V or something like that in order to boost it to the 6V+ the 12x requires

 

[rhd]

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.

 

[tsteele93]

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.

 

[benmwv]

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