Electronics Forum / Electronics / October 2005

Anyone with Knowledge please share

Could someone tell me of a supplier in Australia of solder dissolving
solution to clean PCB's?
Thanks in advance,
Charles L

did anybody encounter problems with Chipsource ?
I've purchased components which were almost all defective (98% of 500
parts).
The problem is that they have shipped the parts 3 weeks before the scheduled

About 3 months ago Sanity had a deal where you bought 4 DVD's and they gave
you a free DVD player.
The player had a 90 day return to Sydney warranty.
After about 90 days mine stopped working. Investigating I found that the

I wanted to know if there is any controller chip for controlling upto 4
USB ports,It will be great if any one of you can give information about
controller chips for multiple USB and RS232/422/485 ports.I have come
across LSI's L1501.

Hi anybody got any idea where I can find the most simpliest square wave
generator with the smallest component counts?
I'll need something with pulse width control
also need a circuit for detecting current, and once it reaches a level of

Is it just me, or did anyone else think the new pommy Brainic show on
Ch10 tonight was an *extremely* bad Mythbusters rip-off?
The Brainiac-Babes?, sheeze, give me Scottie and Kari any day!
I might think twice about putting my Rubidium frequency standard into

I am a electronics student and designing a project.  I am trying t
design a handheld drag racing starting tree.  I have the basic logi
systems down but I am unsure on using a PIC to control the LEDs o
counters or do i have to use both.  I have not used PICs yet but hav

Greetings All,
Why does microwave radiation heat water and subjecting water to a
current/voltage split water into hydrogen and oxygen?  Is it the frequency
of the vibrations being used?

did anybody encounter problems with Chipsource ?
I've purchased components which were almost all defective (98% of 500
parts).
The problem is that they have shipped the parts 3 weeks before the scheduled

hi! im a total newbie on the field of assembly programming and the
microcontrollers stuff and im trying to build a digital guitar tuner
more like the ones which automatically detects the string being tuned
and has an LCD "analog needle-display"...  any kind of help would be

Does anybody have one or know where I could get one.
Thanks.
T. Dunster.

Not a technical issue as such but it's really Peeing me off  a bit.
I just purchased a brand new MP3 player and having never had
one of these its started peeing me off..
First off some songs I have have vocals recorded on certain

Wanting to build a digital dashboard for my old vehicle which is currently
being rebuilt.
Most indicators will be bargraph (LM3914) but I am having difficulty coming
up with a decent design for a digital speedo (plus odometer).

I'm still working on  the Mosfet power switching design I was fussing about
a fortnight ago. I'm a bit hamstrung by the fact that I've used Mosfets
before in other peoples designs but have never had to actually think about
them. I can make a stab at bipolar transistor design but ...