Electronics Forum / Components / January 2006

I'm looking to replace a blown Li 2.8V 0.65AH NVR backup battery in a piece
of kit.
The original battery is marked "Catalyst Research B-600", but I cannot find
new ones anywhere.

In this picture of four electrolytic capacitors:
http://static.flickr.com/22/93055272_e828b475e8_o.jpg
Which lead is the positive one for each cap?
The black and white dots on the two capacitors on the left are actually

Are you examples soft programmation  ampli  AD8555 is a zero-drift,
sensor signal amplifier with digitally programmable gain and output
offset.
Thank in advance.

I want a single supply op amp that will operate near the positive rail.
Supply voltage will be about 15 volts.  Doesn't have to work within
millivolts of the positive rail; two tenths of a volt will do.  I
looked at the LM741 datasheet, but to me it's unclear how close to the

Help,
I would like to install a CT on an electrical service and connect it to
a digital readout display (with a 5 amp input) 70 feet away using #14
gage wires. The CT would have a primary of 100 amps and a secondary of

Anyone know where I can get these in the UK?
Thanks
Mike

Anyone know where I can get these in the FR?
PS I don't want ST Microelectronics - any other manufacturer
(not ST) is ok
need only a quantity of 26 pieces

I am looking for an IC that will control a full h-bridge from fwd to
rev using a voltage pulse from a function generator. The load voltage
is from 5 to 8V, and the current passed through the load is ~16A. I
need to be able to switch the bridge from fwd to rev from 0 to 100Hz. I

Greetings all,
I am working on a project, and what I'd really like to have is a custom
LCD display. Basically, a strip 2"x12" with maybe 10 large segments of
shapes I define. Has to be individual segments, not a matrix display.

After my first thread going from "standard" cheap parts for up to vhf
frequency to a discussion about the usefulness of Spice simulator...... I
try it another time hopefully get attention of frustrated co-readers:
For example the rechtifier diode 1N4007 can be used as a rf switching ...

What package is this IC? http://www.css-networks.com/tsop.jpg Is it a TSOP?
It seems to be 4mm x 2.8mm and I really can't imagine any regular test-clips
being small enough to get in there.
Can anybody advise on the best way of connecting to it in-circuit? Should I

Are there small and cheap potmeters 50 ohms and lower that are log or
audio-taper?
Reason I ask is that I want to make an adjustable current source out of
just two parts, an LM334 and that potmeter. Well, plus maybe a limit

Any idea? Where to buy (order) ICS501 in Europe, if none USA is also an
option.
Thanks, Adam

Who makes the chips that generate the ubiquitous car alarm sound
effects?  The ones that cycle through five different annoying effects,
but are ignored by everyone?   eeee-ooooo, eeee-oooo, whoop whoop,
bzzzt bzzzt, etc.

I've some TEK probes coming from the US which have the standard (well, your
standard) mains plug, and it's part of the supply box so I cant' change it.
The best solution would be something like
http://img-europe.electrocomponents.com/largeimages/CF253724-01.jpg