Search found 2778 matches

by haklesup
Tue Apr 29, 2003 10:10 am
Forum: General Discussion
Topic: Temperature readings into a PC?
Replies: 16
Views: 2689

Re: Temperature readings into a PC?

Many motherboards have one or two temperature sensors built right in and used to monitor HDD or CPU temp etc. It wouldn't be too hard to extend the wires on one of these sensors and put it outside the box.<p>The MB should have a utility for looking at the temp as well as other stats about the PC (fa...
by haklesup
Fri Apr 25, 2003 11:55 am
Forum: General Discussion
Topic: audio frequency oscillator w/ meter
Replies: 1
Views: 606

Re: audio frequency oscillator w/ meter

Don't know about a kit but a search for "Function Generator" on ebay showed lots of used equipment in the $5 to $50 range. A function generator would be more useful in the long run because you can make more than sine waves. Some have displays and others just have a calibrated dial. You may want one ...
by haklesup
Tue Apr 22, 2003 1:22 pm
Forum: General Discussion
Topic: ¿ A very different approach for circuit boards ?
Replies: 14
Views: 2529

Re: ¿ A very different approach for circuit boards ?

Conductive Ink printed on a hard paper substrate with ICs bonded directly was supposed to form the basis of really cheap disposable cell phones. Even though I saw a prototype on TV, I have never seen a commercial product for sale anywhere that uses this PWB technology. <p>What ever happened to that?...
by haklesup
Wed Apr 16, 2003 6:41 pm
Forum: General Discussion
Topic: SP8685 IC----- 500Mhz counter
Replies: 2
Views: 812

Re: SP8685 IC----- 500Mhz counter

Do you know who made the IC? (is it Plessy). Are there any other markings on the device. Put "Obsolete Semiconductors" in a search engine to come up with distributors who specialize in out of production devices. <p>I found it on the ubid.com. They list about a dozen distributors with quantity. Searc...
by haklesup
Mon Apr 14, 2003 7:28 pm
Forum: General Discussion
Topic: Composite Video Output
Replies: 6
Views: 935

Re: Composite Video Output

Could be pretty useful but at $70 it is just on the line of being worth it since you can get a small TV with AV inputs for about the same price. If the price does come down a bit (it is likely to) then I may buy one too.
by haklesup
Mon Apr 14, 2003 5:44 pm
Forum: General Discussion
Topic: Electrical Engineering as a College Major and Career
Replies: 11
Views: 1870

Re: Electrical Engineering as a College Major and Career

A career is sort of an evolutionary process. Don't worry so much about exactly what job you will have when you get out (unless you do have a clear goal). That first job will be a function of what is available and where you live as much as it is what you want. I had to move from Baston to San Jose to...
by haklesup
Mon Apr 14, 2003 10:40 am
Forum: General Discussion
Topic: Electrical Engineering as a College Major and Career
Replies: 11
Views: 1870

Re: Electrical Engineering as a College Major and Career

Mike,<p>Although I cannot underestimate the usefulness of hands on projects for learning, fostering interest and lets not forget the simple pleasure of a hobby, there are plenty of EE disciplines that require no soldering skills at all.<p>Take for example the Semiconductor industry which dominates t...
by haklesup
Thu Apr 10, 2003 2:13 pm
Forum: General Discussion
Topic: consumer alarm clock displays
Replies: 2
Views: 687

Re: consumer alarm clock displays

That LCD Display looks pretty custom. It has lots of details. Dosn't seem that anyone would offer it as a generic component. It's more likly that all those retail outlets buy the same or similar clock from the same OEM who will print any name on the base you pay them to (called VAR Value Added Retai...
by haklesup
Thu Apr 03, 2003 12:17 pm
Forum: General Discussion
Topic: Question for any TV tech out there
Replies: 6
Views: 1043

Re: Question for any TV tech out there

Sounds like a ground loop picking up noise from a circuit inside the set. There are many sources of noise in a TV. Look for unattached shield or ground wires. Wires (especially to ground) that were added by the tech at the time of repair. Broken or cold solder connections anywhere but especially gro...
by haklesup
Wed Apr 02, 2003 10:55 am
Forum: General Discussion
Topic: Monitor temps
Replies: 10
Views: 1563

Re: Monitor temps

For off the shelf, two companies immedietly come to mind. Omega and National Instruments.<p>Omega is big in the temp sensing field. A quick look at one of their excessively thick catalogs shows a model OMB-DAQ-56 can be configured with options for 120 inputs for around $3k. It's USB, comes with SW a...
by haklesup
Tue Apr 01, 2003 7:31 pm
Forum: General Discussion
Topic: ELECTRONIC GAS SAFTY DEVICE
Replies: 6
Views: 1337

Re: ELECTRONIC GAS SAFTY DEVICE

Certainly the debate over the usefulness of patents rages on. The only ones guaranteed to make money off a patent is the lawyer (no wonder he didn't like the article)<p>Since you already went through the trouble of getting a Utility Patent, your choices are: 1.Become an OEM and make it and sell it y...
by haklesup
Thu Mar 20, 2003 1:06 pm
Forum: General Discussion
Topic: stupid question
Replies: 1
Views: 581

Re: stupid question

Its in the Tools menu. Go down to Macro and another menu pops out where you will find a button for the VB editor or you can push Alt-F11.<p>You must have installed this option when you installed word to have all the choices.<p>Use the Help for more info. VBA for Excel and Word is a subset of VB so y...
by haklesup
Wed Mar 19, 2003 10:34 am
Forum: General Discussion
Topic: Differences in transistors
Replies: 7
Views: 1305

Re: Differences in transistors

Even within the same manufacturer, lot to lot differences exist. This is why it can be a challenge to build a differential amplifier out of discrete components. People pay a premium for matched pairs of transistors or even pairs mounted in the same package.<p>Look at the Electrical Characteristics o...
by haklesup
Tue Mar 18, 2003 5:07 pm
Forum: General Discussion
Topic: Differences in transistors
Replies: 7
Views: 1305

Re: Differences in transistors

I believe they are. Both part numbers cross reference to the same NTE rfeplacement part number www.nteinc.com/specs/100to199/pdf/nte123ap.pdf <p>the 2N prefix is a standard from JEDEC and is much more common http://www.chipdocs.com/pnsearch/search.html?okwd=MPS3904&partid=11732&ReR=GG but the MPS is...
by haklesup
Tue Mar 18, 2003 4:34 pm
Forum: General Discussion
Topic: CCD switching noise?
Replies: 3
Views: 737

Re: CCD switching noise?

The answer to your question is deeply rooted in the methodologies used to design IC chips. The noise you imagine should not exist in a proper design. <p>Much effort goes into simulating the electrical signals that are present in the circuit. The models that go into Spice and VHDL are based on the la...