Electronics Forum / Electronics / September 2004

I'm wondering if there's some sort of list out there, that lists the
number of watts, and what that number of watts can power.
1 watt powers a   ?
2 watts power a  ?

I've moved jobs a year or so ago and working from home.  I've lost touch of
the best magazines for electronic design engineers.  Can someone recommend a
few?
Many thanks in advance.

I am looking to replace the following AC/DC wall wart:
Bothhand Enterprises Inc
Model M1-10S05
AC Input 120VAC

Forgive my ignorance. Is a DC transformer different than AC transformer?

Forgive my ignorance. Is a DC transformer different than AC transformer?

Can anyone give me a brief  history of their dealings with this company . I
recently faxed ( they insisted on fax  to be sure of correct details ) an
order for a single component and was correctly billed . Four days later I
received another component which I had not ordered and I ...

I constructed the EPROM Emulator published in Elektor magazine in the
SEPTEMBER 1992 issue.  It worked quite well under Win98, but lately I
started using it on a HP Compaq nx9010 Pentium 4 laptop using WinXP,
and am getting inconsistent results.  The downloading of code into the

I'm wondering if anyone knows of a site, explaining brushless dc
motors - their design and and how they work.
Please advise.
Thanks,

Where can I find low cost ATMEL's ATMega development boards localy in
Australia?

Please excuse the newbie question:
How can I make an ordinary LED light up regardless of the VDC polarity?
I can imagine a way to do it involving four additional diodes, but
that's more than I have room for in this application.  Is there some

I need a bit of help. I have an application where I need to alter the
polarity automatcially without swapping the connections.
Currently I have a 16VDC 900mA power supply and a switch that brakes a
circuit. The first time I use the switch I need it to break +ive the next

I am aware that a ground loop can form when you have two or more
computers or peripherals plugged in at different sockets and connected
by a cable (be that RS232 or what have you; anything that conducts
electricity). Very bad.

I had a broken YX360TR Sanwa multi- tester whose measurement is inaccurate.
I need its schematic circuit and components' values. Thanks a lot in
advance.
Tong

Objective: The purpose of the Electronic Design Contest is to promote
excellence in the design of electronic systems and help the company to
improve circuit design quality by providing competition between
graduate and undergraduate students at universities and colleges.

I am trying to compile a hit list of stores (online/real world) that will
sell small quantities of SMD parts to 'Bruce Public'.  At the moment I'll be
a bit vague on what actual parts, if anything the 'typical' hobbyist parts
(if there is such a description).