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Online EEVblog

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EEVblog #866 - Mailbag
« on: April 05, 2016, 12:54:07 pm »
Is this a slice of Dave's Brain?
Find out in today's Mailbag




SPOILERS:
A silicon wafer bonanza!
A temperature sensing plasma etching wafer
http://www.diychristmas.org
Bullshit Bingo
Model car controller
A very expensive single photon counter teardown and some experimentation.
Random cheapo Chinese Ebay items! A shocking pen, a wet baby monitor, and the world's worst soldering iron.
 
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Offline alexanderbrevig

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Re: EEVblog #866 - Mailbag
« Reply #1 on: April 05, 2016, 01:11:51 pm »
benched!

Offline MatthewMorgan

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Re: EEVblog #866 - Mailbag
« Reply #2 on: April 05, 2016, 01:59:57 pm »
I was the one who ordered that horrible soldering iron.

It cost me £0.99 (AUD$1.86)

I think it might be one of the worst items he has every seen,

If people want i can order him something even more dangerous.
 
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Offline RGB255_0_0

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Re: EEVblog #866 - Mailbag
« Reply #3 on: April 05, 2016, 02:04:01 pm »
9:45 - new Internet meme TBH.
Your toaster just set fire to an African child over TCP.
 

Offline n3vti

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Re: EEVblog #866 - Mailbag
« Reply #4 on: April 05, 2016, 02:24:14 pm »
I loved your reaction to the cheap Chinese products.  :-DD
 

Offline RGB255_0_0

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Re: EEVblog #866 - Mailbag
« Reply #5 on: April 05, 2016, 02:29:29 pm »
I loved your reaction to the cheap Chinese products.  :-DD
Would love them to be sent to Bigclive.
Your toaster just set fire to an African child over TCP.
 

Offline mverber

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Re: EEVblog #866 - Mailbag
« Reply #6 on: April 05, 2016, 02:46:30 pm »
What was the input impedance of your scope set at when you looked at the output pulses from the Photon Counting Module?  I think it's designed to provide TTL pulses into a 50 ohm load -- if your scope was set for high impedance, the impedance mismatch might explain the ringing and higher than expected voltages you see on the pulse. 
 

Offline MatthewMorgan

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Offline ModemHead

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Re: EEVblog #866 - Mailbag
« Reply #8 on: April 05, 2016, 04:04:46 pm »
I loved your reaction to the cheap Chinese products.  :-DD
Would love them to be sent to Bigclive.
Are you 100% sure?
 

Offline Mephitus

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Re: EEVblog #866 - Mailbag
« Reply #9 on: April 05, 2016, 04:38:00 pm »
You have no idea how jealous I am over those wafers. I have been wanting some to put in a proper frame for the wall.
A true gentleman must be prepared for anything. - Pepe le' Pew
 

Offline SeanB

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Re: EEVblog #866 - Mailbag
« Reply #10 on: April 05, 2016, 04:39:11 pm »
Just in case anybody is looking for the ebay listing..

http://www.ebay.com/usr/aberco

Postage to the rest of the world...... Ouch!

did order 2 though, and will frame them if they arrive intact.

Reason for the detector saturating is internal opamp saturating, as the massive signal exceeds the common mode voltage of the amplifier, either on chip next to the photodiode, or the one outside doing current measuring. A possible solution is to install an optical switch ( though at the cost of the sensitivity going down a lot) to blank the optical path during laser firing. You can use a second detector as well so you get the rest of the data, and this lower sensitivity data from the dead period should still be usable.

https://en.wikipedia.org/wiki/Electro-optic_modulator

The original use depends on the start of the pulse, and is specified for that. Saturation is not a worry on the typical system as they use a very good optical path to reduce leakage light. They want the first return pulse, and not the rest.
« Last Edit: April 05, 2016, 04:52:58 pm by SeanB »
 
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Offline JAH981

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Re: EEVblog #866 - Mailbag
« Reply #11 on: April 05, 2016, 04:40:37 pm »
SPOILERS:
Bullshit Bingo

I would love to translate the Bullshit Bingo for you!
 

Offline SeanB

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Re: EEVblog #866 - Mailbag
« Reply #12 on: April 05, 2016, 05:05:05 pm »


The SensArray
 

Offline redshift

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Re: EEVblog #866 - Mailbag
« Reply #13 on: April 05, 2016, 05:18:23 pm »
I assume the blue tape is just to hold the dies after they get diced apart?

But does anyone have any more info about the plasma temperature sensing wafer thing?
 

Offline Fungus

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Re: EEVblog #866 - Mailbag
« Reply #14 on: April 05, 2016, 05:55:43 pm »
I assume the blue tape is just to hold the dies after they get diced apart?

Yep.
 

Offline flextard

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Re: EEVblog #866 - Mailbag
« Reply #15 on: April 05, 2016, 08:03:43 pm »
I have a similar silicon die documenting project as well and would love to help.
« Last Edit: April 05, 2016, 10:55:27 pm by flextard »
 

Offline Lovely_Santa

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Re: EEVblog #866 - Mailbag
« Reply #16 on: April 05, 2016, 08:20:16 pm »
@ 27:00 when he opens the bag with the soldering iron (or something that is supposed to be a soldering iron at least...)
He's getting a "Why-do-I-even-open-this-bags-moment" : ooohhhhh, ohhhhhhh noo  :-DD

English is only my 3th language, so don't tell me my english is bad, becose I know that, I try to do what I can...
 
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Offline Kjetil

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Re: EEVblog #866 - Mailbag
« Reply #17 on: April 05, 2016, 08:36:54 pm »
SPOILERS:
Bullshit Bingo

I would love to translate the Bullshit Bingo for you!
The point of it (as the postcard mentioned) is that it doesn't need much translating. It just shows how international management bullshit is  :rant:
Scout leader and HAM radio operator
 

Offline station240

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Re: EEVblog #866 - Mailbag
« Reply #18 on: April 05, 2016, 09:02:51 pm »
I loved your reaction to the cheap Chinese products.  :-DD
Would love them to be sent to Bigclive.

Big clive already has that iron, he seems to be an expert at finding this crap himself.
 

Offline ChunkyPastaSauce

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Re: EEVblog #866 - Mailbag
« Reply #19 on: April 05, 2016, 10:42:15 pm »
@ 27:00 when he opens the bag with the soldering iron (or something that is supposed to be a soldering iron at least...)
He's getting a "Why-do-I-even-open-this-bags-moment" : ooohhhhh, ohhhhhhh noo  :-DD



Yeah that was awesome - the nauseation/depression/loathing feelings were real, no rehearsal from what I could see. lol
 
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Offline Smokey

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Re: EEVblog #866 - Mailbag
« Reply #20 on: April 06, 2016, 06:27:34 am »
Just in case anybody is looking for the ebay listing..

http://www.ebay.com/usr/aberco


Bought some wafers.  Should make a great addition to my nerd art along with my old revision production solder paste stencils and frames.
 

Offline FloFo

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Re: EEVblog #866 - Mailbag
« Reply #21 on: April 06, 2016, 08:21:01 am »
Regarding the strange signal form on the Single Photon Counters: try using a 50 Ohm terminator at the Scope, should give a much better signal and removing most of the ringing and negative signal resulting in almost square 4.5V pulses with aprox. 35 ns length (at least that is what i measured with the Perkin Elmer SPCM-AQR-14).
 

Offline deephaven

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Re: EEVblog #866 - Mailbag
« Reply #22 on: April 06, 2016, 10:56:17 am »
Re the Geocoin. I see that 41 Geocachers have "discovered" it on it's page at geocaching.com So there are at least 41 closet Geocachers frequenting this forum. Maybe there should be a special section for Geocachers as it can be fun making caches with electronics in them, so it's not completely off-topic.
 

Offline romelec

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Re: EEVblog #866 - Mailbag
« Reply #23 on: April 06, 2016, 12:39:04 pm »
If people want i can order him something even more dangerous.
Something like this boiler ?
 

Offline MatthewMorgan

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