Electronics Forum / Components / January 2008

Hello. I want to use a phase controller with more control over a drill's AC  
motor speed than the controller inside the drill. I'm hoping it's enough to
set the internal one at full speed and to ignore it while using the external
controller. Is this bad, and if so, what can be ...

hi,  i want to make a led torch , something simple , that runs of 2  , maybe
4      ,  1.5 volt battteries .
and  to power   2 or 4  white leds.
is there a driver to make  bit more efficent use of battery and leds ?

please sent a update news in electric &scince
 thanking you

I'm making a simple gadget that's got a couple of connectors
and an IC or two.  I'll probably make 10 of them.  I'd like
to be able to make 100.
I'd like to put them in a reasonable looking box/case.  I'll

I've gotten myself into a spot of trouble, and would
appreciate some help with it.
This is a Bolun WR-601 wireless microphone, specifically the
receiver for that system, which is powered by a single AAA

After trying Google, McMaster, and lots of others: Is there a
see-through (thin) mesh that can be fastened to the back of a steel
panel using conductive epoxy around the perimeter? Preferably something
that can't rust.

After trying Google, McMaster, and lots of others: Is there a
see-through (thin) mesh that can be fastened to the back of a steel
panel using conductive epoxy around the perimeter? Preferably something
that can't rust.

Is there a really, really detailed schematic with guaranteed output
voltage limits versus sink current for the LM324? Most look like this:
http://www.national.com/ds/LM/LM124.pdf
Obviously, page 8 top left and the schematic show that one can get to

Wait for an important announcement on 1/29/2008!

A long time ago RCA published a good range of application notes.
One in particular I'm looking for.
I had it, when I was young, but it just disapeared...
If any body should have it, pls let me know.

Usual resistors are rated up to around 700V dielectric. Some exotic SMT
can go to kilovolts but they are expensive, rare and also long so that
breakage or other flex damage is likely. Then there are small specialty
mfgs such as Hokuriko but they aren't really very available at ...

I'm seeking a connector for 12v battery charger application. One end will
be mounted in the vehicle, the other on the charger cord.
Since both will be "hot" the usual "supply end is female" does not apply.
I seem to recall a round Cinch-Jones connector where it had one pin

Can I use  such adapter: http://www.czstar.net/prodshow.asp?ProdId=1803#
for portable DVD player, I have a plug for car lighter. I wonder if it
can make harm to dvd player, the quality of current required  by
fridge is not as good as by electronic device. The power would be

Gone are the days when I used to service TV sets and could easily obtain the
occasional BF981 from a scrap tuner.
These days I obtain the occasional modern miniature tuners with very tiny
SMD MOSFETs with no markings, The Peak/Atlas component analyser will read it

Found a pack of unused tube bases which I don't recognize.
They're about the size of american octal, but with 9 pins spaced 36 degrees
and no spigot slot.  There's no base of that type on my Avo Valve
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