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Yes, I'm sure. Those have too many I/O signals for a 64-pin DIP package.That 88xxx makes me suspicious -- are you sure it isn't an 88000 part
of some sort?
You need an Opamp? Y for? A distrbution amp just needs to have a high5532 & 5534??? These were the bees knees back in the '80s. Are they
*still* the best for audio? I'd be surprised if there were nothing
more
recent that has better specs....
I admit my days of analog design ended years ago - but i have a little
requirement for an audio distribution amp hence recommendations for
good
audio op-amps would be very welcome.....
Watson A.Name - "Watt Sun, the Dark Remover" wrote:
[snip]
No, they inverted the meaning of one of the bits in the configurationBeen a long time since I looked, but as I recall, they inverted the
sense of one of the pins when they went to A???
I never asked about mechanical fatigue. I was only worried aboutWell, if you had provided this info initially it would have saved a
lot of time spent considering this aspect.
This 'shoestring' test measured voltage deviation at 5VDC, not AC.Well, I tried this for myself. Using a speaker and running several
different frequencies through it (with the cap attached through a
linkage 10" away), the oscope showed a clear voltage deviation. Some
frequencies (10kHz) were worse than others (500Hz). Maybe before
attacking someone's question, you may want to make sure you're not
making too many assumptions.
Now you are introducing a completely different set of circumstances.
Just what has your original question got to do with alternating
voltages at audio frequencies.
I have a microcontroller reading a dual-channel 12-bit ADC, oneWell it just seems to me to be that you might be trying to stimulate
some discussion purely for your own entertainment. If you really want
some help on this describe exactly what it is you trying to
accomplish.
Best Buy opened up a new store last week, so I decided to stop on the
eway home from work and see what they had. Well, I checked out the
Compact Flash and similar flash memory cards and they've got them, but
there's a price war going on right now with prices dropping like crazy,
with such online ads as 'save $640.00' which is probably true,
considring that a year ago a 1G CF card was close to a kilobuck. I
bought a half G Sandisk Ultra II last month for $77 tax and shipping
inculded, and now they're down to $62 online, and $69 at this store. In
a year or so, you won't be able to buy the 128M, they'll all be 1G and
up. Prices on the 'pen drives' or 'Jump Drives' are falling like crazy
too.
But really what got me ticked off was that I tried to find a reasonably
priced USB extension cable, and the cheapest they had were "USB 2.0"
cables for $37, with golf plated ones over $31! And they had racks of
them, stuck between other studd, obviously since no one in their right
mind would buy them at that price!
A salesdroid asked if I needed help, and I said, yeah, where's the door?
I'm leaving for Fry's! I said to him, I can walk over to the aisle with
the 6-in-1 memory card to USB adapters and buy the adapter *and* and
extension cable for less than the price you're charging for the 6' cable
alone! He just shrugged and said, yeah, I guess so.
It looks like they're playing the same game they played with the 'surge
strips' in the last few years. They sell you a system with CPU,
monitor, printer, and say, "Oh, and you'll need a power strip for that.
Here's one that's $29.95 but we'll let you have it for half price with
the system." The customer, like a dumb fish, takes that bait, and they
sell, at half price, what cost them a whole dollar or less. On the end
of the surge strip isle, man, I couldn't believe it! They had this
isplay of a power strip that looked like the front of an amplifier! Gold
anodized - as you were going to put it _on_ your desk instead of under
it. It had jacks for not only power and phone, but coax F connectors!
There's this switch and a sign that says, "turn left to hear what dirty
power sounds like". They put a speaker on a hissy, grungy sounding
amplifier. BUZZZZZZ... Then turn the switch to hear with our power
strip sounds like. Right. Suckers!
With the USB cables, they're pushing the "2.0 is 40 times faster" and
making it sound like you have to get the 2.0 cable, with the almost
certain knowledge that the average customer doesn't know that the USB
2.0 specification says that it is _fully_compatible_ with USB 1.1
cables. Wow, almost a license to steal an extra $20 from every sucker -
er customer that walks thru the door!
And that's just one accessory. I also wandered down the aisle with the
speaker accessories, like Monster Cable. They have their own brand
name, something like "Geek Squad", but it's the same thing. But we've
already been over that one dozens of times here, so I'll leave it at
that. :-(
--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@
Excuse me, but you, Mr. Name are the one who injected PBSMssrs. Crowley and Linden are trying their best to bastardize
the thread with some discussion about PBS sponsors. Maybe
they're too immersed in politics to think about other things, like
what I'm talking about that's on-topic.
You need an Opamp? Y for? A distrbution amp just needs to have a high
input impedance so it doesn't load the source, and low output impedance
so it can drive longish cables without rolling off the high freqs.
Something as simple as an emitter follower would do just fine, if all
you need is unity gain. if you need a bit of voltage gain, then a
single transistor common emitter stage before the drivers with a bit of
NFB will give you enough gain. And with the NFB, the bandwidth could be
enough to handle video - 4 to 6 MHz.
Hello,
I am looking for a menufacturer of test probes and sliding contact.
Does everybody know one?
Thank you and regards,
Julius
Addendum. I believe this to be aa SMC style case (j tabs), but it isIn article <h732r0dblaulnfihkjmnv0n1ef2djqf7r5@4ax.com>,
legg@nospam.magma.ca says...
On Fri, 03 Dec 2004 23:11:32 GMT, Tim <tim@tim.tim> wrote:
Hi, I have been trying to source out info on this SMD part for several
days now. It looks like a diode or transil device use in the circuit.
The device I have is dead shorted, and another identical device reads as
a diode. It is marked J3U with a 9N below that. Searches on google and
yahoo did not turn up any useful info. I have checked an smd resource
and found simliar device numbers but they where caps.
Or even a schematic of an Acer Travelmate 514 dc convertor board would
give me the info I need, I can't find that either.
Any help would be greatly appeciated.
Body size is an important part of SMD identification. You don't
mention it.
http://www.marsport.demon.co.uk/smd/smdcode.htm
9N PLVA2662A Phi A SOT23 dual ca 6.2V reg diode
9N CMDZ2L2 CSC I SOD323 zener 250mW Iz 0.5mA 2.2V
J3 ZC831 Zet C SOT23 ZC821
J3 MMSZ5248 Vis I SOD123 zener 300mW 5% 18V
J3 CMOZ20V CSC I SOD523 zener 350mW 5% 20V
RL
I believe it is an "I". I appreciate the link and the info. I have seen
this page before (or a clone of it).
I guess the U at the end means something else? I figured the U would be
extra info, and the 9N would be a date code as it is located under the
J3U.
The device really does not match anything listed. This one is about 7 mm
long and 4mm wide. It is similiar to the SOD series, but a lot bigger.
Thanks,
- Tim -
Addendum. I believe this to be aa SMC style case (j tabs), but it is
narrower than the spec as it is only 4mm instead of 5mm.
If that helps any.
- Tim -
A lie... a GOOD lie!http://www.666666666666666.666/?6=66666666
S
The threshold voltages for a logic-series schmitt trigger are going toI am interested in having slightly different trigger voltages for a
circuit I'm designing. I've noticed that the 40106 hex inverter and the
74HC14 have different positive and negative going values; both are
greater for the 4000 chip. Is this particular to the 40000 series (same
manufacturer)?
thanks
Mitch
mbillian wrote:
I am interested in having slightly different trigger voltages for a
circuit I'm designing. I've noticed that the 40106 hex inverter and
the 74HC14 have different positive and negative going values; both
are greater for the 4000 chip. Is this particular to the 40000
series (same manufacturer)?
thanks
Mitch
The threshold voltages for a logic-series schmitt trigger are going to
vary all over the map from part to part and (most likely) over
temperature.
If your application is sensitive to slight differences in trigger
voltages then you may want to look to using a comparator & positive
feedback (and watch your supply voltage for it's accuracy).
Thanks for the advice.
What is donkeyconga.com? No, I will _not_ go there, because I don'tAre there still people that dont know about these sites yet? sheesh..
theres a list of about 20 of them at donkeyconga.com
I'd test the other, still-functioning part. You indicated that itStill not the same critter. It seems that the ones at the first link do
not come as SMC style, with the pins folded under, but the ones listed
at the second link are close, just shorter.
This thing is in an Acer notebook too, so I'm having a real hard time
getting info on the board itself.
Geez a simple problem with an easy fix, all I gotta do is get one little
part. Sounds simple huh?