Electronics Forums

where would I buy a 300 amp 1.5 volt transformer

Tywaser — Fri, 18 May 2012 00:18:36 GMT

I need a transformer that can produce 300 amps of around 1.5 volts. It has to have a 110 primary that will use 14 amps max. (at good efficiency, 7 amps at rated load) Where would I find this and how much would it cost? This is for making a spring glow or for making showers of sparks. (outside!!).

Fokking "media markt" audio cable plugs to thick. (and bought security cam trebs 99500)

Skybuck Flying — Fri, 18 May 2012 00:17:52 GMT

Well,

I tried to replace the audio cables for my headphone which I wrote about
before.

Turns out the audio cable plugs are to ****ing thick ! or the headphone hole
to ****ing small ! :(

I also bought a shitty wireless webcam lol. (actually it's a security cam...
but looks like a webcam but cannot be used as webcam ?)

I should have known better then to go to a store which has as slogan: "I am
not crazy" lol.

Well at least this store does still exist and have cables. The store did
help me before with the receiver setup, though some of it's plugs were to
think too... but at least some cables were ok.

The cable's packaging stated something like 3.6 mm and 2.5 mm plugs but
still too thick plugs (too much black plastic ) ! damn you audio cable plug
designers !!!! MAKE SMALLER PLUGS !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Wasted money: 120+ or something euros damn...

Well the webcam looks kinda nice on the outside and it has infrared...
(trebs 99500 model). I think I saw it before in the store a year ago and was
intrigured by it.. I probably checked it out on the website before...and
thought better not...
but this time I just could not refuse the temptation... the description was
so good lol... only later to find out it was shitty motion jpeg and 640x480
resolution... (kinda suspected it ;)) the infrared is kinda cool though.

It has these little red things that light up as it goes dark... it can also
work on power cable or remotely by batteries... so kinda cool design, except
the damn resolution is too low... and no zooming... (also wireless makes me
a bit nervous for interception...)

I wonder if it has encrypted wireless... I also wonder if it can be
programmed against... like for example the usb receiver can it be used for
other stuff... hmmm... also the webcam cannot be used as a webcam... it's
actually a security cam... which is kinda odd...

Maybe there is somewhy to pipeline the video to flash... I haven't tried to
use it yet in live messenger... maybe it's better to not try at all lol ;)
:)

Maybe I should do a proper review of it instead of jamming it into this
message... But then again it's result is so shitty might not be worth it...
but from a design point of view I like the little fokker ! ;) :)

It looks like a rocket interception or radar station... then again I wonder
if it made people nervous when I put it outside shortly to "observe" ;) :) I
quickly removed it because it's probably illegal to "observe the streets
with a cam" ;) :)

None the less funny ! ;) =D

It looks like the head of a little robot ! ;) :) It other words: it looks
cute ! ;) :)

It can move/turn a little bit too...

Bye,
Skybuck ;)

Re: built in electric oven stopped working

Winston — Fri, 18 May 2012 00:12:00 GMT

hr(bob) (E-Mail Removed) wrote:
> On May 12, 8:11 am, beckyboo wrote:
>> my electric oven has just stopped working thought it was the fuse as the
>> ignition and the clock both not working either - changed that and still
>> nothing, checked the main fuse but that seems ok any ideas?? There was
>> no bang or fuse tripping before hand just one day it worked and the next
>> it didn't!!
>> Any advice would be great thanks x
>>
>> --
>> beckyboo
>
> How about some make, model, age, etc information????!!!!!

I'm sorry. That is 'need to know' information.

--Winston

Re: Silly question, AC power plugs

Jamie — Thu, 17 May 2012 22:10:50 GMT

Jamie wrote:

>
> Guess Edison's brain was working one day.. Who knows, maybe it came
> after him?
>

If you'd ever had your brain come after you, you would not
care to repeat the experience, let me tell you.

>
> Jamie
>

--
Les Cargill

Realistic model# 31-2097

djrich1972 — Thu, 17 May 2012 20:14:53 GMT

everything powers up on this home stereo receiver but no sound is coming out. Any suggestions?

Re: camera trick

John Devereux — Thu, 17 May 2012 19:40:50 GMT

John Larkin <(E-Mail Removed)> writes:

> These big old Tek 11801 scopes don't put screen snaps on memory sticks
> or anything fancy like that, so I photograph the screen for manuals.
> To get a nice flat field, you have to back off some and zoom, and then
> you need a tripod to hold the camera steady. Light level is low, so
> the camera takes a long exposure. When you push the button, that
> jiggles the camera. The delayed exposure thing takes too long.
>
> Here's the trick, which works with my camera: deliberately shake the
> camera as you push the exposure button, and step back. The camera's
> anti-shake logic will wait until it thinks it's steady, then shoot.
>
> This seems to make sharper pix than any other way.
>
> Zoom up on this one:
>
> http://dl.dropbox.com/u/53724080/Cir...240_100_ps.JPG
>
>
> I post-process with Irfanview.

Joel Koltner wrote a program to capture the 11801 screen via RS232. Uses
wxpython (so should be cross-platform). I have a copy but an official
source seems to be here:

Here is a screenshot some random usenet scraping company seems to have
located:

(I use GPIB so don't use it myself)

--

John Devereux

Interval Time Delay Relay

camservo — Thu, 17 May 2012 19:39:04 GMT

I'm hoping to make something similar to this http://www.ssac.com/animation/interspo.htm . (described in the "Interval On" relay type at this page.. http://www.macromatic.com/support/kb...?kba=kba116tdr ). Anyone have a link to a schematic like this one? I'm relatively new to electronics, but I get the terms pretty well. Thanks!

HT12E to the serial port Connection

vineeth.b20 — Thu, 17 May 2012 19:29:32 GMT

hai ;
for my project I just found out that i might need a HT12E encoder. i was wondering if it was possible to connect the HT12E to the serial port, so that i could send the data to the HT12E through the data out pin and then from the HT12E.Please Help me any one .....

Re: Interview with Colin Mitchell from Talking Electronics

Yaputya — Thu, 17 May 2012 19:27:56 GMT

"David L. Jones" <(E-Mail Removed)> wrote in message news:4e3a1fe9-b1de-4678-9281-(E-Mail Removed)...
> Hi All
> Long time no visit.
> Just letting you know that I've finally got around to uploading the
> first part of my interview with Colin Mitchell from Talking
> Electronics magazine fame when I met up with him at his home in Sept
> last year.
> He was kind enough to spend several hours talking about the history of
> the magazine and various others things.
> There were no set questions, it was just a chat about whatever came
> up.
> Several more parts to come in due course.
> http://www.youtube.com/watch?v=kXWRLNq8OCU
>
> Regards
> Dave.
> www.eevblog.com

Great interview!
Colin was a bit vague on AEM (Australian Electronics Monthly), though.
AEM was started by Roger Harrison and David Tilbrook as a result
of the bullshit that was going on at Federal Publishing Co. at the time.
FPC had bought ETI from ACP (Packer) and the editorial offices
were moved from Rushcutters Bay to Waterloo. FPC then bought
Electronics Australia and moved it to Waterloo. It was obvious that
some sort of merger was inevitable, so Roger and David made plans
for AEM and left ETI, taking draughtsman David Currie and some of the
old ETI contributors as well.

Colin mentioned something about a man and his son - Roger had two
sons and at least one of them (Jamye) did write for AEM.

Re: Interview with Colin Mitchell from Talking Electronics

Yaputya — Thu, 17 May 2012 19:27:56 GMT

example of impedence calculation

bazzel — Thu, 17 May 2012 18:52:41 GMT

Hello all. I am having a problem working this kind of problem out.

If I have a series RL circuit and I know the inductance of the coil in henrys, the resistance of the resistor in ohms. It is an ac circuit but I dont know the frequency

My question is. Can I work out the reactance without the frequency? And, can i work out the impedance in the circuit with those numbers.

An example would be appreciated. Thankyou

euroLED, 13-14 June, NEC Birmingham, UK

Andrew Gabriel — Thu, 17 May 2012 18:28:19 GMT

One of the exhibitors just emailed be about this event, so
thought I'd mention it here in case anyone is interested.
No idea how good/bad/ugly it is, as I've not been before.

http://euroled.org.uk

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Re: Silly question, AC power plugs

Chiron — Thu, 17 May 2012 17:16:58 GMT

On Thu, 17 May 2012 09:33:33 -0700, etpm wrote:

> On Tue, 15 May 2012 11:22:21 -0700 (PDT), George Herold
> <(E-Mail Removed)> wrote:
>
>
>> Why do US 120 VAC power plugs have holes in the end of the blades?
>>
>>George H.
> The holes are so you can run a little wire through them to connect to a
> power source without a receptacle. Just another variation of the
> "suicide cord". I'm surprised you didn't know this as the suicide cord
> is just basic electronics.
> Eric

I always thought that was the alligator clips that were connected to
mains. Great way to incinerate yourself. Makes a lovely display to
impress your friends as you sparkle and flare... but only that one time,
of course...

--
Celebrity voices impersonated.

Electromagnets?

Moha99 — Thu, 17 May 2012 16:54:49 GMT

Hallo everyone!

Im interested in building an electromagnet! Now I'm still learning about it a few things came to mind:

1) Electromagnet's fileds can be strengthened by increase the current or decreasing the radius, how can I decrease the radius?

2) Are electromagnets constantly changing their magnetic poles(N>S>N>S)?

Thanks!

Computer controlled Led on or off

vineeth.b20 — Thu, 17 May 2012 16:41:14 GMT

Sir,
I am new in electronics . i was doing a embedded project .I have 5 Led on and off with computer control. LED are l1,l2,l3,l4,l5. The Led are displayed with computer control with serial port and able to display multiple LED at a time .Please Help me any one to design circuit diagram:)