Hi all,

I would like to built an AC/DC converter with universal input
(90~264Vac) and one 12V/2A output.

It need to having power saving under 100mW when the output loading is
40mW.

Can anypne suggest me PWM ICs which can acchieve this target...

Thansk!

Webber.

Nobody Special wrote:

One problem: you are ASSuming only electronic (AKAdigital) cameras ...

Hi guys,
I've been tearing apart a Brother PT-1000 label printer with the eventual
goal being to connect it to a desktop PC to print labels for my various
component storage boxes. I've figured out how the print head communicates with
the controller board, which just leaves the motor drive circuitry.

Naturally, being a low cost device (£15), the PT-1000 doesn't use anything
remotely stepper-motor-like for the label feed. Instead, it uses a cheap
Mabuchi DC pancake motor (an RF-300C-11440, for which I have yet to find a
datasheet) and a speed reduction gearbox. The speed control is performed by a
ROHM BA6220 chip.

Ideally I'd like to eliminate the ROHM chip (seeing as it's basically
unobtainium) and use a PIC of some description (probably a 12F675) to do PWM
speed control of the motor. But first I'd like to understand how the ROHM chip
manages to do what it does.

I found a datasheet for the '6220 here:
<http://www.classiccmp.org/rtellason/chipdata/ba6220.pdf>
.. but like most ROHM datasheets, it doesn't say much about the chip, other
than that it uses back-EMF sensing and how to determine one of the two
external resistor values.

Nobody Special wrote:

I would imagine it would be pretty simple, and probably NOT contravene
any FCC regulations. You'd need a modulated IR emitter; since it's not
emitting any RF it's not going to mess with police radios, pacemakers,
or the like. But since cameras use IR to autofocus (paparazzi aren't
going to be using manual focus!) you should be able to build something
with the size and power requirements of a TV remote control -- eminently
portable. You might camouflage it as a necklace or belt, to get 360º
coverage.

On Sun, 31 Aug 2008 12:31:30 +0000, Nobody Special home.com>
wrote:

Very illegal. No physical contact is required and gadget doesn't even
have to be effective. It's considered assualt if anyone "feels"
threatened. If the nature of the weapon is indeterminite, then it's...

"It's the 1st time in over 60 years.

John Edwards has been banned from making a speech at the Democratic
Convention for having an affair and lying about it.

Bill Clinton will be speaking in his place."

Found on;
http://onemansthoughts.wordpress.com/category/politics/

Mike

On a sunny day (Sun, 31 Aug 2008 12:31:30 +0000) it happened Nobody Special
home.com> wrote in giganews.com>:

And you came to the aid?
Always have video camera ready, where on youtube?

Pacemaker - kill - you jail.

Celebreties are celebrities because they WANT to be celebrities.
If they beat up photographers is is because they are asking for attention :-)

Yes

our webside: http://www.sourcesoso.com
our email: sourcesoso@yahoo.com.cn

http://nikesneakertrade.photo.163.com

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"john jardine" idnet.co.uk> wrote in news:csFtk.65662$c47.30500
@en-nntp-06.am2.easynews.com: