Electronics Forum / Electronics / December 2005

I've been looking at in circuit programs for a new project I'l like to
start. I reckon I'd need a in circuit programmer as I'm new to the
16h628 and would probably compile my code a few hundred times before it
works :)

I found this excellent design procedure for flyback SMPS:
http://fairchildsemi.com/an/AN/AN-4137.pdf
Beautiful equations! But I'd like to see the derivations. I could
proceed upto a certain point, but when VRO came, I faltered.

One application note helped me calculate the Air Gap in the center
branch of EI core, for my SMPS design.
I'm about to purchase an EI core and bobbin. But how do I create the
Air Gap (0.4 mm) ?

Might someone happen to know a way to control the inkjet cartige with
pulse signals instead of the computer?
 would like to build a circuit for that purpose.
I want to be able to "shoot" ink droplets from all the nozzles at the

can any body tell me that  oled   can be mounted practically  in a
application  project .if yes how

I'm trying to build a basic car battery charger.
The charger will use a 14.4V, 4A SMPS to charge the battery.
The SMPS output will be directly connected to the battery terminals
[other suggestions?]. The SMPS will be a flyback convertor and I have

This is a kind forward of a post on aus.invest, where I am replying to
infamous Travers Vaurien of Perth, also known as Travis Morien. ( a 3rd
degree French descent migrant )
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I am in the process of moving & need to get rid of an oscilloscope.
It's a 10 mhz Heathkit dual trace from the late 70's.  I know, not
worth much in $$$ (looked at selling it on ebay, where similar units go
for about $20, it's not worth the time/trouble to pack properly for

I'm looking for a circuit to linearise a thermocouple mV signal, so I
can display temperature on a cheap digital multimeter.   In particular,
I'd like to convert the output of an R-type thermocouple.  The
conversion need not be very accurate - an error of 10 degrees would not

I'm searching for a notebook PC with 1400x1050 or higher display resolution
on 15.x" or 17" display.
So far I found the following notebooks but they are slow (1.xGHz).
Do you know any other notebook with 1400x1050 res. and with 3.xGHz?

I have a board which is currently using several LT1491's, specifically for
their ability to tolerate up to 44 volts above V+ at the inputs. The down
side, is that they are expensive, and frequently out of stock. I'm curious
is anyone out there is familiar with a similar device ...

Does anyone know who would have manufactured the tube in an Acer AC711
CRT monitor?
Thanks.

hi,  any body  got a schematic/link to build a  1 volt dc   reference source
?
thanks.
mark k

What kinds of ideas have been used in the past to make so called "hi quality"
sounding amplifiers in stereo systems?
I'm thinking of things like the Carver amplifiers of the 80s. Are there any
odd ideas that people have tried in the past?

Is magnetic field affected by metal conductor?
How metal works with electric field, magnetic field, and
electromagnetic field?
Thanks,