T&L Publications

Hi there,<p>I used an old AT style ps for mine. Made a quick supply with outputs of +5, -5, +12, and -12 volts. Didnt make it variable though, and was thinking about adding an adjustable regulator to the output +12 supply. This wouldnt be hard to do, and since it would be external, if anything went ...

Wow, <p>From » "Basic Inductor Question"
to » "Electronics Thesis"<p>in two short weeks,<p>Wow!<p>:-)<p>--Al

Hi there,<p>Perhaps you could post the formulas and
even the derivations if possible.
That would make for some interesting
reading.<p>Take care,
Al

Hello again,<p>Thanks for all the replies. Most of them were very interesting and informative.<p>I found some thermal cutoffs rated at 3 amps and 250vac and 115 deg C so im going to try them first. They are only 0.5 amp over the ones originally installed by the manufacturer.<p>I found them on the BG...

Hi Ron,<p>I dont always think of this as a problem either, but with the TTL LS family for example, the spec sheet says not to short more then one output at a time, so even though it's only a short for maybe 50ns or so, i would rather use another method for that family. On the other hand, if i was pr...

Hi Ron,<p>That's both a question and an answer :-)<p>I would prefer to use open collector devices because that would eliminate any momentary output short to ground if a regular gate was used. This would require pullups.<p>Since it's harder to find CMOS gates with open drains perhaps it would be easi...

Hello,<p>I was going to wait a little longer to see what else came up in this thread, but couldnt resist chipping in right away :-) I hope to see more interesting replies also.<p>There are four fundamental forces of nature: gravity, electromagnetism, and two nuclear forces: the weak and the strong.<...

Hello,<p>One way to do it would be to resolve your load into an equivalent inductor in parallel (or in series) with a resistor. Then, combine that with a parallel capacitor. Solve the resulting network equation for cos(angle(i)). Then, try different value caps, or enter the network equation into a c...

Hello,<p>To add to the other posts a little...<p> Both the capacitor and the inductor are passive circuit elements. Even though they can both store energy, they are still considered passive because they can not deliver an unlimited amount of energy.<p>Although a rigorous definition of duality is a l...

Hello again,<p>Yes im quite sure it's a thermal, because it looks identical to units i've seen on other web pages. Same exact markings except for the current rating. Since i have an old device, i could even grind it a little to inspect the inside to verify it has the same internal construction too, ...

Hello,<p>Thanks Tim R. for the reply.<p>I was afraid to replace the 2.5 amp device with a 10 amp device because i had found that thermal cutoffs are used for at least two reasons: 1. To cut off the power supply in the event the device malfunctions and overheats. The cut off protects the device from ...

Hello,<p>The simplest scheme is to wire two inverters in antiparallel and use a SPDT switch. This provides de-bouncing no matter how long the bounce is. You wire the output of the second inverter to the input of the first inverter, then the output of the first inverter to the input of the second inv...

Hi there,<p>Do you know what the value (uH) is suppose to
be?<p>--Al

Hello there,<p>In most cases, unless you want the very least functionality you will need to use a CPU or controller microprocessor. If this sounds ok to you, then you should proceed. If not, then you may wish to stick with individual analog devices. A Basic Stamp might fill the bill as well. There a...

Hello again,<p>L. Daniel,
Heres the web address of the free spice software:
http://www.linear-tech.com/software/<p>I recommend this to anyone working with
electrical circuits that is interested
in doing some analysis and/or experiments
right on the computer.<p>Al