EEVblog #1351 - Mailbag

Mailbag time!

SPOILERS:
00:00 - GPS Tracker Battery Leak
06:47 - Guest RF Lab - Chuck Kummer W7CLK
09:46 - Marklin HO scale railway turnout point
19:29 - GVDA GD118B Pocket Multimeter review
39:10 - GVDA GD116A AC Voltage Detection Stick review
43:41 - E-design Tweezer LCR Meter
45:11 - Low Temperature Bismuth Solder (a.k.a ChipQuik)

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#Mailbag #Multimeter #Review

[davidalarson]

The manual switches move so you could glue a tiny magnet to them and use a couple of hall effect sensors next to them detecting the configuration...

[rustedfriend]

Just move the TV once, take a picture of the shelf, and then display that picture on the shelf.

[williamsquires]

Of course, now that the batteries know they’re being tested, they’ll go for centuries before they leak (or, at least until you perish)! That’s the ol’ “It never fails in the repair shop” rule! 😂

[BenHeckHacks]

"Tighter than a nun's nasty" gonna have to remember that one :)

[gblargg]

28:21 Exactly how I came to put screws back in years ago after some thought. One time a friend said "dummy it goes in the other way". Nope, there's a reason to turn the "wrong" direction at the beginning. You avoid trying to cut new threads into the plastic between the others.

[steverobbins]

That RR turn out looks just like the ones I used back in the '70s. My first electronic design in 8th grade was a PWM speed controller. That's how I got into electronics.

[HighestRank]

Naming of the video segments really helps those of us following along to follow right along.

[idwarp]

"this's not a knife mate, is just an aussie letter opener."

[stebennett]

Welcome back Dave :) loving all the vids you do and love the good old mailbag.

Hope you and all your fam are doing well with all this human malware that is still going on and thank you for all the great vids you have uploaded for the last 4 or more years or how ever long it's been.

[pyromen]

As far as the train tracks go, my goto would be a small Hall effect sensor below the tracks and a thin magnet attached to the moving bits.
Then again I might be biased because I have a stock of like a hundred Hall effect sensors and a buttload of thin neodymium magnets.

[ChuckandChun]

Thank you Dave. I have added a few more things to my bench since July and like all designers, upgrades to equipment happens quite often as the budget allows. Keep up the great videos!

[jameslmorehead]

At work, we use that type of solder for reflow only type chips for prototyping where everything else is being hand soldered. Makes getting chips with large thermal pads down nice and easy in our lead free shop.

We have had unfortunate accident with it though. We sell tools that operate at 150C. We had an engineer spec this low temp solder for a short run of boards for just one chip, and he thought he could get away with just damming it with epoxy to keep it in place since the pad underneath is just one big thermal pad. Those boards ended up getting put into tools and sent out as engineering samples. Lo and behold, the solder got out and covered just about everything. Funny enough, it wasn't too hard to clean. We just used a hot air rework station set at 120C to melt the low temp solder. When it was molten, we'd tap the board on the workbench on its side and it all popped right off nice and clean.

[happyfunstick]

"My knob's a bit dodgy" ~Dave Jones

[Digital-Dan]

Is it true that the company's slogan was "If it works, it's a Fluke?" Depending on how you interpret the ambiguity . . . .

[steves]

That crazy ozzy bloke could mean 99% of australia

[AndrewFremantle]

I wonder if that fancy solder might be useful to Louis Rossman in certain applications - he's sometimes trying to solder around stuff that really doesn't like getting hot.

[johnmarshall]

Hi Dave ... I live in UK and really love your videos ... I am in the process of building a DCC Model Railway quite large need to build a shed 10 ft X 13 ft though next spring as boards are in garage and loft ... Okay the thing needed to switch solenoid points ( dont like them SG90 servos much better ) is a capacitor discharge circuit I have one to control a couple of solenoids that I have on a couple of remote points ... only problem you need to be a member of MERG to get kits or schematic and it does have a couple of relays for switching polarity on frogs which could also be used for position indication ... I have a few bits for Mailbag when I get round to sending so will put schematic in bag ..

[andyhello]

Nice to see mailbag back.

Its weirdly satisfying watching others open parcels, lol

Who would of thought at start of youtube, that watching people unpack parcels, and open envelopes, could bring so many views?

[Ratchet_effect]

Hal can send to Mailbag but when you leave the Lab. Dave: open the door Hal. I can't do that Dave! Then Dave replies no whackers, I'll just tear! it apart.

[tomgeorge]

11:00, My dad built during the 1960's a 20' x 12' layout, great fun and electronics teacher for us kids. He kept it rolling until 2009 when Alzheimer's kicked in.
Hornby-Triang HO/OO, modelled on GWR, Gods Wonderful Railway, as dad was bought up in Slough, the heart of GWR.