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.orgBullshit 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.
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.
9:45 - new Internet meme TBH.
I loved your reaction to the cheap Chinese products.
I loved your reaction to the cheap Chinese products.
Would love them to be sent to Bigclive.
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.
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.
Just in case anybody is looking for the ebay listing..
http://www.ebay.com/usr/abercoPostage 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_modulatorThe 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.
SPOILERS:
Bullshit Bingo
I would love to translate the Bullshit Bingo for you!
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?
I have a similar silicon die documenting project as well and would love to help.
@ 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
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
I loved your reaction to the cheap Chinese products.
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.
@ 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
Yeah that was awesome - the nauseation/depression/loathing feelings were real, no rehearsal from what I could see. lol
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.
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).
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.
If people want i can order him something even more dangerous.
Something like this boiler ?