it's the forty second episode of everybody's favorite day of the week
mailbag Monday let's start with this one it says expansion board module why do I
never remember to get my knife before I start one of these things what have we
here
that's not exactly an expansion board module but it's a handy dandy thing it
is some two pins screw terminals oh it's specifically it's these
pluggable ones so you solder that piece onto your board and then you screw the
wires on which makes it pluggable and of course polar ice so kind of going one
way well latching latch there to hold it but
not so much okay so those are destined to be power connectors for various and
sundry future projects handy little things several other pieces of equipment
at work have the have similar things on them and it just makes like replacing it
pulling it out to maintain it or repair it even install it just easier you don't
have to deal with you know getting your screwdriver right in tight to the face
of the units to get at those screws you can do it
you know out here in free space where you're not you know it'll confused and
cramped and everything else especially if the equipment the year installing
goes inside a cabinet or something but even just for some random project like a
Christmas lights control or something just being on the plug the power in and
out is really convenient ten little pieces kf2
EDG kkf - 2 p - pin right angle plug in terminal connector 5.08 millimeter pitch
from LS 1 1 o 1983 this was free shipping again from China
buck 64 Canadian or door 25 American what is next
we have repair fixture offices in there do your valuable customer leave as
positive feedback edits to your favorite cell resistance whatever haha this is
actually a soldering helper kind of thing it's a circuit board clamp so when
you're soldering a circuit board well it's okay so here's how this thing works
if your soldering up some circuitry you adjust that and clamp your board into
there just a little spring of a thing so there and it's holding your board
solidly with components kind of held off there and then you can get at it with
your soldering iron so that's for some applications why can't I never find
anything when I wanted and hurry hey so that I think in some applications is
going to be more handy than using the big dremel vise that I've got or the
helping hands least I hope so I've seen something some of the guys on YouTube I
think David Watts is the first one that I saw using something similar to this
his is no doubt a better quality one than the cheapest possible Chinese one
which is what of course this is because that's just how I roll let's see just
how cheap it really was Universal PCB circuit port holder fixture repairing
tool for mobile phone not sure if that would be appropriate for a mobile phone
or not but for soldering lots of circuit boards it really would from
gene mall selection I paid 503 Canadian or 383 American with
no 89 cents shipping oh my goodness that must have been the sheep cheapest
one I could find though oh well that clarifies everything in
that description right there 12 centimeters by 8 centimeters not much
else to say next in we have expansion board module seems to go popular why
this week okay it is in fact an expansion port module of some kind
that's getting closer it has a little microphone there it is a power in out
there alternately out there buck speak version 3.5 no buck speak 3.5 version
1.0 3.5 millimeter is probably referring to the jack on it okey-dokey so I wonder
if this is just an amplifier I created this little transistor on it as well so
it's providing power to power the electret condenser microphone and some
little amount of amplifying there some resistors and a couple capacitors back
there and that's all it really is huh
so I thought I'd give this thing a little try here hooked it up to or I got
3.7 volts coming out of there it's drawing like three milliamps pretty
negligible but the output hooked up to my little skull P here and check one two
check one two I'm pretty much on top of it and there is stuff happening but you
can see there's also some nasty nasty looking interference just for reference
here's what happens when I unplug the scope probe from it okay so that's
fairly unpleasant that is in order to get there piqué piqué that's like half a
volt that's ridiculous so here I'm just adding a capacitor that
the power supply does nothing how big is that twenty two hundred microfarads so
you know a little bit smaller just the right convenient here not super
convenient oh well so obviously that is not going to be my new microphone for
doing recordings here in the shop slash studio but it might be interesting just
to go to an analog input an analog pin of an Arduino and use it just as a noise
lack of noise trigger or something like that I don't know we'll see
well after that dismal failure let's see what's in here
it's a cable that openly no one else thank-yous it is just an HDMI cable okay
um how can I make this interesting exciting it's both sixteen seventeen
inches long I don't know it's red in black it's got
kind of woven stuff okay okay this is three-in-one black gold plating HDMI
cable adapter HMI to micro adapter 0.5 meter to the meter for PC from wis tech
I paid four dollars and twenty nine cents and calls itself a point five
meter HDMI cable adapter kit and it clearly shows that there are adapters
with it but none came with this one
that's pretty much the cable I got except for with red ends but whatever
but it didn't come with those that's annoying so basically I paid just shy of
five bucks for a half metre HDMI cable let's see if we've been a better luck
with this one it says Oh light bulbs that's always a fun topic even another
another one with the begging for up folks like things interesting oh okay
this is same kind of thing that you'd find it adults in the dollar store it's
just some of those wire mounted tiny little surface mount LED so I'm gonna
zoom in here melted in a ball all above epoxy or silicone or something here you
go so a bunch of those things on some
skinny wire heat shrunk to that driven by and battery box is there any magic in
the battery box let's tika open there we go
so is your circuit board in there no it's just the wire okay let's grab some
doublea's then no disasters I got it I'm in control here so we mmm there we
go power off power on they are kind of warmish wait okay if
you've been watching big cry for a while and you should then you've seen these
things these kind of lights before they're they're kind of neat for
lighting effects people stuff them into bottles and just wrap them around stuff
this isn't the exact list thing that I bought it from but this is the same guy
and it's an auction I bought it at auction originally this is one x two
meter or six and a half feet warm white LED battery string stripe strip rope
glow like party Christmas deckle from rainbow deals
I paid at auction 93 cents Canadian this particular one that I'm showing you
right now is another auction which will be expired by the time you see this but
it's currently up for auction at a dollar thirteen at three bids notice
that's the or 31 and cross-eyed anyway you can go from
the search string if you want there anything else to say about this okay so
here we go LED light strip warm white 20 LEDs indoor/outdoor I don't think I'd
want to use it outdoor necessarily all those battery-operated it might get
destroyed but it's not going to explode or anything and again there we go not
dimmable 2 meters 2500 as cool as this thing is and I'm feeling a little bit
ripped off this week several of these things didn't live up to expectations so
off to the first-in first-out meal buffer yeah you may have heard the
Canada Post is on rotating strikes right now don't worry it's not going to
influence the mailbag schedule at all
what do we have here expansion board module Oh high hopes
I hope so we got two things oh okay two things are better than one what is
this first thing this is voltage in and what is that okay so that is where is an
actual USB thing
okay so that's a voltage converter from some voltage to USB okay got an inductor
there and a little switch mode chip no doubt okay I can find that one quickly
enough I think this isn't the exact listing that I bought it from cuz I
bought it at auction a long time ago but it is the same seller and they're still
selling it DC converter point nerve and a whole bunch boost step-up ba-ba-ba
power supply etc etc this particular one is three point and three volts three
point three three point seven four point two up to 5 volt a boost okay I was
initially thinking it was a buck but it's a boost so you can come from oh
what is that three voltage that looks very similar three point seven four
point two that's a lithium-ion cell isn't it up to 5 volt boost ok cool from
DIY box did I say that already I don't know I got this at auction for 72 cents
currently it's selling for adult or 30 so here is the specs on it such as they
are input between two and a half and and five point five volts strange output 5
volts amp and a half typical to at max 92% efficient working temperature
anything that you'd likely to be existing in without dying the switching
frequency is 1 megahertz so it's not going to cause any noise that you're
gonna hear static or class and power consumption eating micro amps very
negligible okay and it's got a blue LED oh that's nice
also in the same package obviously from the same seller we have one of these
cheap little servo testers three modes chick servo or ESC manual mode neutral
mode and automatic window wiper mode okay how you select those
he's zooming a little tighter here they're better so we have four point
eight to six volts input here we have servo outputs there and speed adjust Oh
okay so there's the modes ah select is this little button down in here okay and
this is just a little flexible plastic cover that's kind of glued on there well
there's a little bit of foam in the back so that you don't stab through it yeah
that's interesting adjustments steering gear tester ccpm
three mode ESC servo motor for RC helicopters or whatever really from DIY
box of course dollar seventy one Canadian this device can be used as a
signal generator for electronic speed controller then you test your motor
system without a transmitter and receiver you can connect one two three
servos simultaneously and test for consistency and so on
and connect one two three ESC to test and compare their okay I don't have any
ESC s I'm gonna helicopter is that 15 milliamps or OS at 5 volts uses four
point eight to six volts output signal there's the timing because that's what
you need to control a servo motor size color blue okay let's go play with it
hmm played with this for a little while here and I can get it to work
successfully with one servo connected to any of the three outputs here so this is
a manual mode I can put it into neutral which puts the it into the center
position basically a servo if you've haven't played with these a
servo basically can go anywhere between zero and 180 more or less
you've got about 180 degrees of rotation and by putting it into the center
position using this you can use that to manually line up what you're installing
just into a neutral center position and then this is the what they call
windshield wiper mode and it works with any of these servos there's a ground
power and signal wire but as soon as you attach to this particular one I don't
know if it's the problem with this one or with the design there seems to attach
a second one it just seems to start resetting itself
or something and slowly steps them to the end now it's not an issue of current
I've got this thing current limiting at about an amp and a half and it claims to
only be drawing about you know 60 70 milliamps in this mode right here with
two of them let me just put one of them back on there and put it in the
windshield wiper mode which is going to fairly consistently run it and we're
peaking with one of them at about a hundred and twenty ish milliamps or so
so having two of them on there isn't going to current limit me so I'm not
quite sure what's going on I suspect or something weird with this one but
regardless even without that it's handy for just being able to do that or set it
to its midpoint for installing them now then I ordered this thing it took 75
days to get here I ordered it way back before I started
doing my my last railroad project now when I did the yard controls right
because I thought this being able Center it and being able to run it through its
paces would be a useful thing but then when this thing took so long to show up
I just built this thing which you may remember from that really old yard video
which does similar it runs it through its range of motion with the pot it
shows me where it is between 0 180 degrees so if I wanted to set it to its
neutral position 90 degrees I could just use that pot to do it right
so this thing isn't quite as useful what I the one thing that I was hoping to use
it for is that mode where you where it claims you can run multiples and set and
watch them go just to see if they're all one as linear as the other one
see this one it looks like well where is it
so there's it's middle position and there's its windshield wiper ring it
looks like it goes a little bit further that way from Center than it does this
this way from Center what the hell it just reset itself yeah
Wesley impressed but for buck 75 I'm not killing myself and this is a lot more
portable than that thing on the breadboard although I could probably put
that in a case and they get a little bit more portable yeah I don't know I'm not
too choked about this it would have been nice if it had worked properly but
whatever so there's today's mailbag items in all
their glory and or disappointment one thing I forgot to do because I am bad at
remembering this is tell you how long it took for stuff to get here the screw
terminal stick a month this circuit board soldering holder took three bloody
months to get here this disappointing noisy what a microphone module took 11
weeks the HDMI cable that came with out its adapters took six weeks the LED
string took a month and this final charging from a lithium-ion battery unit
and the servo tester took 75 days precisely oh not bad I'm a mixed bag and
I can use that this could be kind of fun that'll be useful this I'm looking
forward to using this board holder in my next kit build video
coming soon this thing yeah I come in handy sure running a 5-volt thing off
with you my own battery absolutely always a useful thing well thanks for
watching oh yeah another disappointment I'm on call so I don't get to have a
beer with this I got a drink coffee yeah thanks for watching
comments questions down below as always links will be down there
you made a notice last time and I'm gonna do it again this time I've got the
links doubled up there's just normal link and there's
also an affiliate link with eBay doesn't cost you any more if you use it I get a
nickel well a painting probably given the cheapness of these things kickback
from eBay if you don't want to use it don't just use the normal link it's down
there too if you want to help me out and when if you're buying any of this crap
feel free Thanks also as always to my patreon supporters who kick a buck in
the tip jar now and again and help me not go bankrupt doing this for you
thanks for watching I will talk to you later
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