Electronics Forum / Electronics / April 2005

Is there any practical use for old IDE hard drives, 50-200MB in
working order. Or are they only fit for trashing? Any ideas?

I have a compact FM transmitter that runs on three AA batteries.  I'd
like to get  an AC adapter for it but am not sure what specs are
necessary.
At first I was thinking that a 4.5 v AC adapter at around 300 mA,

What's the best timer chip to pulse multiple pen laser like this http://www.onewithall.net/laser_pulse.gif 
Is it possible just to use one IC chip?  If so anyone have an example
TIA

Wondering if I need to buy a NiMH charger for NiMH rechargeable AA
batteries or a normal AA charger will work with the NiMH batteries. Can
anyone tell me if this is possible?
Thanks in advance!

I found a site on the web that disposes of software, one of the products is
a complete version of Electronics WorkBench. I am trying to find if it's
student, etc. It's version 7, which is "the last version". Any comments if I
can get this for a few hundred dollars?

Help  !!
I have a star type UHF Aerial DA feeding TV to rooms in my place.
I also feed reverse direction from CCTV switcher via another discrete
UHF cable, into the DA via splitter.

Trying to solder QSOP16 packages to a PCB by hand, bascially just have the
PCB cooking ontop of a infrared bar heater and simply bunging the IC ontop
when the solder melts... apart from getting the IC to align it does a good
job at soldering the IC, only problem is the heater ...

Strontium titanates have a relatively high dielectric constant (~225-250).
Sr titanate is used for capacitors and other electronic components requiring
high dielectric constant.
Does anyone here know what these numbers mean.  I don't know what a ~

I'm using one of these set as a constant current regulator. The
datasheet says 2.2A max, internally limited by thermal shutdown.
If I try to pass more than that, despite it being very well heatsinked,
will the component shut down completely or will it just refuse to pass

I have a Toshiba laptop which keeps terrible
time and I was just wondering if anyone has
successfully adjusted the RTC in a laptop
to keep better time. I understand these quartz

I am a design student at Pratt Institute in Brooklyn. I have a
project/prototype due this Thursday and wanted to see if this is
something you (or someone you know) could be able to help me out with.
It doesn't have to look great, just work. I can design the housing (if

Just a short message that I found this website offering some service manuals
etc..
Link http://www.eserviceinfo.com/
Cheers

I'm in the market for a step-down transformer, (I'm in Australia where
voltage is 240 and need to run some small (100W Max) USA appliances) and in
my research I am finding the following....
The specs say: This is not dielectrically isolated. What does that mean, and

I am not sure if this question is going to the right group, but some of you
might be able to give useful answer.
When you play a CD, why can't the title of the track be displayed on the CD
player, instead of having to use the CD case. or us it, maybe it can be done

Hi I'd appreciate some help.
I have a NiMh battery charger which has AC input of 100~120VAC
50~60HZ, 1.2A.
It outputs at 36VDC, 1.8A.