Author Topic: EEVblog #940 - Mailbag  (Read 11212 times)

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Online EEVblog

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EEVblog #940 - Mailbag
« on: November 08, 2016, 01:09:24 pm »
More Mailbag Macarism




SPOILERS:
Namco Wireless TalkAid speech synthesisier
Chart of Electromagnetic Radiations Poster:
https://www.flickr.com/photos/llnl/9403051123/sizes/l/
Dell & Wun Hung Lo tablets
Canon Notejet III CX notebook with bubblejet printer!
HD Quad helical silver printed helical antenna
http://www.hd-quad.com/
GSM RF amplifier teardown
Old Omron PLC teardown
Old earth resistance meter teardown
Hanna Instruments pH meter and conductivity meter teardowns

 
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Offline SAI_Peregrinus

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Re: EEVblog #940 - Mailbag
« Reply #1 on: November 08, 2016, 03:11:12 pm »
Why do a nixie clock if you can do a nixie display for a 7 1/2 digit multimeter!?
 

Offline Tom45

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Re: EEVblog #940 - Mailbag
« Reply #2 on: November 08, 2016, 05:02:19 pm »
The Chart of Electromagnetic Radiations is copyright 1944 but was first released in 1936. See the story of the chart and Dwight Barr, the man behind it at:
 
http://physicsbuzz.physicscentral.com/2013/09/making-chart-of-electromagnetic.html

A better quality copy can be found at:

https://drive.google.com/file/d/0B8efip5URbLaM0UwTjV0VlYxdlU/view
 

Offline Seamoss

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Re: EEVblog #940 - Mailbag
« Reply #3 on: November 08, 2016, 05:31:30 pm »
Hey Dave!
Who did you go through to print that electromagnetic spectrum poster?
I'm considering ordering one as a Christmas gift for my brother.
 
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Offline sbprojects

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Re: EEVblog #940 - Mailbag
« Reply #4 on: November 08, 2016, 06:45:11 pm »
The two signal paths in the GSM repeater are for the Tx and Rx paths, which are 25 MHz apart (off the top of my head). It needs to be a bi-directional repeater to be useful.
 
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Offline MattSR

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Re: EEVblog #940 - Mailbag
« Reply #5 on: November 08, 2016, 06:52:42 pm »
+1 - who is your printer? Officeworks does A0 for $33 on 160gsm paper
 

Offline Halcyon

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Re: EEVblog #940 - Mailbag
« Reply #6 on: November 08, 2016, 07:10:09 pm »
Hi Dave, your last mailbag item seems to have been from a Finn. The Christmas card "Hyvää Joulua" translates roughly to "Good/Merry Christmas".
 

Offline LazyJack

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Re: EEVblog #940 - Mailbag
« Reply #7 on: November 08, 2016, 07:32:26 pm »
For the earth resistance mater: Norma is the brand, I think it is Austrian. They have some really fine instruments. Erdungsmesser is German for Earthing -meter.

 

Offline jonovid

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Re: EEVblog #940 - Mailbag
« Reply #8 on: November 08, 2016, 07:36:32 pm »
Quote
Quote from: SAI_Peregrinus on Today at 03:11:12 PM
Why do a nixie clock if you can do a nixie display for a 7 1/2 digit multimeter!?
Quote
I'm voting for the clock. And I'll start the flood of design suggestions off with no microcontrollers please.
use nixie display as part of a multi function rack mounted display unit. use as a movie set backdrop prop in you videos, add or change the racks or
change display drivers. whatever you want, a jumbo multimeter to use as an education tool . display unit in one rack. micro in the next rack.
lots of banana plugs and sockets. or change it to a backdrop prop clock if you need one. 
« Last Edit: November 08, 2016, 07:59:17 pm by jonovid »
Hobby of evil genius      basic knowledge of electronics
 

Offline RaubSauger

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Re: EEVblog #940 - Mailbag
« Reply #9 on: November 09, 2016, 01:47:39 am »
Did I miss the link to the HV Nixie Supply? Does anyone knows where I could buy one? Don't really trust myself designing HV PSUs..
 

Offline Cervisia

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Re: EEVblog #940 - Mailbag
« Reply #10 on: November 09, 2016, 01:49:07 am »
To circumvent the Windows 95 password dialog, just click "Cancel". Or you could have created a new account by entering a new user name.
(Windows 95 had no security; the password is important only to access network servers.)

But I guess the thing has already been taken apart by now …
« Last Edit: November 09, 2016, 01:52:35 am by Cervisia »
 

Offline BlinkY

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Re: EEVblog #940 - Mailbag
« Reply #11 on: November 09, 2016, 04:16:23 am »
@EEVBlog
One of the comments on the video had a good idea, I thought:






After researching, it appears within Google's API is the ability to gather one's subscriber count:

http://stackoverflow.com/questions/30723866/youtube-subscriber-count-with-youtube-data-api-v3


Could Dave II have a go, at least?
 

Offline SeanB

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Re: EEVblog #940 - Mailbag
« Reply #12 on: November 09, 2016, 05:35:06 am »
Ordered a A2 canvas print of it today, will collect the unframed print Friday afternoon. R240 ( around $20) at my local Postnet.
 

Offline broz

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Re: EEVblog #940 - Mailbag
« Reply #13 on: November 09, 2016, 05:49:49 am »
Hey Dave, yes they do still make laptops with the nipple. This is my current machine and I have the trackpad disabled so the nipple is all that can be used. Whenever my friends use it, they get so confused!
Slowly but surely making my way through EE school
 

Offline CJay

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Re: EEVblog #940 - Mailbag
« Reply #14 on: November 09, 2016, 05:53:27 am »
Well coincidentally, I was digging around in a flea market and found one of those RF repeaters for £3, they're  a cell phone repeater desgined to retransmit signals inside a building and vice-versa.

I thought £3 was pretty good for a box filled with MMICs so I was about to ask a queston in the RF section about it.

Mine has a few gaps filled in and it's also got two power stages:

M0UAW
 

Offline CJay

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Re: EEVblog #940 - Mailbag
« Reply #15 on: November 09, 2016, 05:57:46 am »
Hey Dave, yes they do still make laptops with the nipple. This is my current machine and I have the trackpad disabled so the nipple is all that can be used. Whenever my friends use it, they get so confused!

Beat me to it, I work with current model machines that are still avaialble with the nipple but the most common ones are the Lenovos
M0UAW
 

Offline PA0PBZ

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Re: EEVblog #940 - Mailbag
« Reply #16 on: November 09, 2016, 06:41:18 am »
Anyone else noticed something weird with the capacitors?



And Ub on the earth resistance meter is most likely the battery voltage.
Keyboard error: Press F1 to continue.
 

Offline CJay

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Re: EEVblog #940 - Mailbag
« Reply #17 on: November 09, 2016, 06:53:18 am »
Hah, yes.

They seem to be correct on mine.
M0UAW
 

Offline SgtTech

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Re: EEVblog #940 - Mailbag
« Reply #18 on: November 09, 2016, 07:14:06 am »
Why not build some form of counter with your Nixies connected to your Raspberry Pi project
 

Offline Barny

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Re: EEVblog #940 - Mailbag
« Reply #19 on: November 09, 2016, 07:38:19 pm »
Anyone else noticed something weird with the capacitors?
Do you talk about the resistor - capacitors?
 

Offline PA0PBZ

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Re: EEVblog #940 - Mailbag
« Reply #20 on: November 09, 2016, 07:49:02 pm »
Anyone else noticed something weird with the capacitors?
Do you talk about the resistor - capacitors?

Yes, a lot of capacitors are marked Rxx.
Keyboard error: Press F1 to continue.
 

Offline SL4P

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Re: EEVblog #940 - Mailbag
« Reply #21 on: November 11, 2016, 08:09:18 am »
That heatsink shown at the end.... probably for those integrated audio amplifier chips that sit upright from the pcb (too katy to look for the case designator).
Don't ask a question if you aren't willing to listen to the answer.
 

Offline f4eru

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Re: EEVblog #940 - Mailbag
« Reply #22 on: November 11, 2016, 09:09:05 am »
Hello,

The bodge looking resistor and lifted pin in the PH-meter or conductivity meter is not a bodge !
it's designes so as to avoid current leaks through isolation material. The PCB, IC socket are leaky at the pA level, especially with some contamination
 

Online NiHaoMike

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Re: EEVblog #940 - Mailbag
« Reply #23 on: November 11, 2016, 03:21:01 pm »
That old Pyle tablet looks a lot like a $40 no name tablet I got at one point, inside and out. (Which I later put to use mining altcoins, just barely paying for itself before the cheap MLC flash gave up...)

That joystick mouse thing is still very common on Lenovo laptops.
Cryptocurrency has taught me to love math and at the same time be baffled by it.

Cryptocurrency lesson 0: Altcoins and Bitcoin are not the same thing.
 

Offline coppice

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Re: EEVblog #940 - Mailbag
« Reply #24 on: November 11, 2016, 03:23:23 pm »
That joystick mouse thing is still very common on Lenovo laptops.
Lenovo and Dell laptops.
 


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