[Eclipse Head Unit Help]

Sorry, you got a bad deal! :(

[Seismic Detector?]

Hi MP,

Here it is: http://www.electronics-lab.com/projects/science/004/index.html

[power supply failure alarm]

Hi John,

I don

[High Quality electronic sites]

Hi Doc,

Those might keep you busy and out of trouble for a while!  ;D

Thanks NanOp !  ;)

[lie detector circuit and reference material]

Hi raj,

What kind of references material do you need? A circuit, test results or other?

[3 Minute Timer]

Hi Jim,

So, we are talking battery powered and spark free!? ;D
I suggest a CD4060, LEDs, a piezo beeper a three way switch and a few small parts in a sealed box.

[Eclipse Head Unit Help]

Well, I would go to the store where I bought it and tell them to put it where the sun doesn’t shine, because that’s where the crap should be!
Then I’d find me a quality player at another store!  8)

[efficient 12v to 5v regulator chip.]

If I got it right here you need less than 500mA and this should be fine with almost no heatsink at all. If you fit it in a metal box just bolt it to the box and you’ll be fine. The tab of the MXL1074CT-SL is common ground so you don’t need any insulation for it if you don’t want to. (I presume your bike has negative ground connected to the frame)!?

[Timer]

Hi Herman,

Welcome to our forum,

We need to see the schematic to be able to help you. Can you please post it or supply a link to it?

[How to use the ratiometric Hall effect sensor(UGN3503) in a levitron]

Hi Shahriar,

Why not buy one, they are not very expensive?
http://shop.conrad.se/cgi/websale6.cgi?Ctx=%7bver%2f6%2fver%7d%7bst%2f3eb%2fst%7d%7bcmd%2f0%2fcmd%7d%7bm%2fwebsale%2fm%7d%7bs%2fconrad%2dschweden%2fs%7d%7bl%2f01%2daa%2fl%7d%7bctx%2fffbcd3b2%2fctx%7d%7bmi%2f000355%2fmi%7d%7bpi%2f%2e%2e671157%2e%2e%2fpi%7d%7bpo%2f1%2fpo%7d%7btpl%2fhead%2ehtm%2ftpl%7d%7bsf%2f%3cs1%3esv%e4vande%20jordglob%3c%2fs1%3e%3cs2%3e%24%241%3c%2fs2%3e%2fsf%7d%7bmd5%2fb92489bd2b990446ddddfb1095826ede%2fmd5%7d

It’s less than 14€.

[Eclipse Head Unit Help]

Hi Jordan,

There are two possibilities here; one is that this is a crappy player (I have seen others also struggling with diverse problems with this model). Second; the installation is poorly done (unless the car harness has some flaw)!

[efficient 12v to 5v regulator chip.]

Woops!  :-[

The MXL1074CT-SL is available as sample and works the same way as the MAX724-26 (max 2A).  ;)

[power supply failure alarm]

If a power supply fails you either lose the power or getting the wrong voltage. The need for failure alarm or a backup system depends very much on the use. A life support system needs a backup but for a less important power supply it might be enough with a failure alarm.

[3 Minute Timer]

Hi Jim,

Welcome to our forum.

You have to reveal a little more about your invention so we are able to help you! What I mean is we need to know something about the voltages and how much power (Watts) you like to control.

[efficient 12v to 5v regulator chip.]

Here is another possible solution:

http://datasheets.maxim-ic.com/en/ds/MAX724-MAX726.pdf

High current, high efficiency, no heatsink, low part count, free samples and no fuzz! ;)

[Beginner Question about Ohm's Law Thanks!]

a fixed voltage divider has 2 resistances in series while a variable voltage divider has a resistance in series with a POT.

The variable voltage divider might also be just a potentiometer and no fixed resistor.

[6v charger regulator]

Hi stuee,

We need the data for the alternator (Volts & Amps) and the battery (type & Ah) you like to charge.

[Download Elektor Journal Here...]

Hi NanOp,

The DjVu files can be converted to PDF.

[Choosing the right equipment wire?]

Here is the PDF version:

Print it and stick it to the wall!

Wire.pdf

[Visual Basic e-book required]

Hi Doc,

Well, since I don’t hate you here it is! ;D

[attachment deleted by admin]

[DC Panel meter read errors on charger]

If you got some space on top of the transformers winding you can add an extra winding here. Use any thin insulated wire and start with say 10 turns then measure what voltage these 10 turns gives you, the rest is mathematics a rectifier and a few more parts.
Another possible way is to build a small galvanic insulated DC-DC converter.

[Electronic Fuel injection enhancer]

Whiteout changing the compression ratio you will only get a less efficient and damaged engine! The ECU will delay the ignition timing and cause a higher temperature inside; pistons, exhaust valves and turbocharger (if you got one) are at risk here. Depending on the shape of the combustion camber it’s also possible to damage the engine with premature detonations unless your engine has a knock sensor. 8)

[Visual Basic e-book required]

Try this one:

http://rapidshare.de/files/29847262/the_book_of_vb2k5_the_ifcvbd.rar

Password:  ganelon

[Beginner Question]

Hi kqp,

The last digit is the number of zeros, 104 = 100000 pF!

[5A regulated power supply]

Hi gogo,

Yes it can handle 5A but not over the entire range of 9 to 25Volts.