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Useful link reference and formulas.

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LAN_403

Arcstarter

Mon Mar 23 2009, 03:29AM

Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253

The main idea of this thread is to help new members with calculations and assorted stuff by having a sticky thread with links to calculations and stuff like that, to perhaps reduce the amount of rather pointless posts. Not naming anyone, there have been very many.

I am basically requesting a sticky thread. Here are my links that are very helpful, and if you wish to contribute, we could get a long list going, and have it stickied.

Also as a sidenote, remember to look into the rules!

Basic Electronics

Calculators

Graphical resistance calculator. Choose the band colors, and it calculates the resistance.

A 555 astable frequency/duty cycle calculator.

Very useful for coilguns. Capacitor energy storage in joules.

Volts or watts into amps.

calculate cm^-1, nm, mS/uS/nS

A better 555 calculator, but needs to be downloaded.

Good RLC simulator, and other coilgun info.

Inductance calculators, for different types of coils.

ANSI PCB trace width calculator.

Ohms law calculator. Good for calculating stuff like resistance dividers, voltage drop across a given resistance at a given current, and such.

Transistor base resistor calculator

Java applications

Very useful java applets of science and physics.

Datasheets and info

Datasheetcatalog for semiconductors. I use this place, and only this place. They have almost everything. Just type in the top yellow bar.

Franks electron tube data sheets for vacuum tubes. This place has most of the tube i look for.

Another good website for vacuum tube datasheets.

A very useful PDF, explaining a lot about IGBTs.

Wire sizes in mm, inches, and AWG, and current carrying capacity for chassis and power transmission.

Another semiconductor datasheet site. Sometimes has the parts others do not.

National semi's guide to switch mode DC-DC converters/regulators.

Maxim IC's power circuit app notes either by purpose or topology, a favourite reference of mine

Maxim IC's DC-DC PSU cookbook (a big table of Vin, Vout, Iout, and the regulator + circuit) - great for quickly adding a known working design into something without having to do as much research and part selection.

Miscellaneous

Tube amplifier schematics. In Italian, but you can use google translate, or just guess the catagories.

Amplifiers, simulation programs, and a database.

Some good helpful schematics.

Tons of information about many different areas of electronics, from PLLs to televisions.

Tons of scanned electronics books, plenty of information about many electronic devices.

Tesla coils

Calculators

Tesla coil calculations (MMC calc, resonant freq calc, capacitor to transformer calc, and much more).

More tesla coil calculators, and other cool stuff.

MMC calculator for SGTC, DRSSTC and QCW

Information

This site has alot of information about solid state Tesla coil theory, spark gap Tesla coil theory, induction heaters, and much more.

If you have something you want to know about tesla coils, Tesla Downunder is great. It also has a bunch of other neat stuff, too. Definately suggested.

A short but useful list of what small capacitors, in a MMC setup, have been found to be good and bad in Tesla coil use.

Some cool calculations/formulas

DRSSTC design guide, a walk-through on component selection

High voltage:

High voltage DC probe.

High voltage AC probe.

Other misc formulas and calculators:

Cm to inch and vice versa. Remember, a mm is a tenth of a cm.

MPH to KPH conversion.

Misc calculators for all sorts of things.

Length of wire (in feet) for a given number of turns around a toroid of given dimensions:

(T * (OD - ID + 2 * H) + (ML / 2.54))

Where:
-T is number of turns
-OD is outer diameter of toroid in inches
-ID is inner diameter of toroid in inches
-H is height of toroid in inches
-ML is mean length of toroid in centimeters (usually given as centimeters)

Surface area of a toroid in square centimeters:

pi * (OD + ID) * H + (pi * (OD / 2)^2 - pi * (ID / 2)^2)

-OD is outer diameter of toroid in centimeters
-ID is inner diameer of toroid in centimeters
-H is height of toroid in centimeters
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Still accepting more, you can never have too many!

Chris Cristini

Mon Mar 23 2009, 03:43AM

Registered Member #1749 Joined: Fri Oct 10 2008, 02:04AM
Location: Claremont New Hampshire
Posts: 497

What about this one.

volts/watts to amperage calculator.
Ohms law calculator

Dr. Slack

Mon Mar 23 2009, 01:40PM

Registered Member #72 Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659

This stuff really belongs on the wiki, some of it might already be there, any chance you duplicate it there? It will be more natural to do that when the wiki is more visible from the main page.

aonomus

Mon Mar 23 2009, 02:08PM

Registered Member #1497 Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801

Once the list grows further I could duplicate it to the wiki, I suggested on IRC to Arcstarter to put the thread here to give it some more publicity so more people could contribute.

Also it would be best to divide that list into a few sections: calculators & reference guides, how to guides, and theoretical reference.

Also, links:
Frequency/period/wavelength calculator, always handy for when you don't want to do a bunch of different conversions from cm^-1, nm, mS/uS/nS.

How to:
HVDC probe (DC only, lossy at AC freq's.):

HVAC probe

Shaun

Mon Mar 23 2009, 07:27PM

Registered Member #690 Joined: Tue May 08 2007, 03:47AM
Location: New Jersey, USA
Posts: 616

I love this site:

1728.com

Check the physics section for electronics related calculators, but also see their Ultra Calculators. The site would be a vital bookmark for everyone here.

big5824

Mon Mar 23 2009, 07:32PM

Registered Member #1687 Joined: Tue Sept 09 2008, 08:47PM
Location: UK, Darlington
Posts: 240

cant forget barrys site

Most useful part is the two java aps down the side

Mads Barnkob

Mon Mar 23 2009, 07:52PM

Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968

How did you miss out on JAVATC and JAVAMMC!! :D

edit:

Forgot to add this library of very useful java applets of all sorts in any field of science and experiments.

101111

Mon Mar 23 2009, 08:15PM

Registered Member #575 Joined: Sun Mar 11 2007, 04:00AM
Location: Norway
Posts: 263

Electronics assistant is a freeware application I'll use now and then. I recommend it.

Myke

Tue Mar 24 2009, 01:22AM

Registered Member #540 Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969

MadsKaizer wrote ...

Forgot to add this library of very useful java applets of all sorts in any field of science and experiments.

Here is a couple useful circuits that are in that page

Chris Cristini

Tue Mar 24 2009, 02:44PM

Registered Member #1749 Joined: Fri Oct 10 2008, 02:04AM
Location: Claremont New Hampshire
Posts: 497

Here is a good one for 555 timers.

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Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob