# AC Formulas in reference

Discussion in 'Feedback and Suggestions' started by thatoneguy, Mar 25, 2009.

1. ### thatoneguy Thread Starter AAC Fanatic!

Feb 19, 2009
6,357
727
The question comes up from time to time, thought it'd be nice to have a quick link:

voltage @ angle, single phase sinewave

$V=V_{\small PK\sim}*sin(\Theta)$

angle @ voltage, single phase sinewave:
$\Theta=arcsin(\frac{V}{V_{PK\sim}})$

one or all forms (might wanna make sure these are right... )
$C=I(\frac{\partial T}{\partial V})$

$C=(\frac{V_{PK\sim}}{\omega \cdot V_{ripple}})R_{\small Load}$

$C=(\frac{V_{PK\sim}}{2 \cdot \pi \cdot f \cdot V_{ripple}})R_{\small Load}$

$V__{\small PK\sim}=V_{\small RMS}\sqrt{2}$

Under Digital reference, a quick lookup table of 54/74xx, 40/45xx logic, at least number -> description, preferably pinout, though those would be a nightmare, I could help if you have a standard format for IC layout. ++SuperNifty Points for adding gates inside pinout for the simpler IC's, as is done in Newnes Electronics Engineer's Pocketbook.

Finally, In Digital Reference or uC, I'll post some code for PWM routines in C.

On that note, can the C / Assembly code colorizer module for vB be added?

2. ### Dave Retired Moderator

Nov 17, 2003
6,960
164
thatoneguy,

Thanks for the suggestions for additions to these reference pages. I haven't had chance to check the equations above, but there is certainly scope to add some of these to the relevant page(s).

The Reference section has always been very much a work-in-progress. Such additions would require us to have a look at the scope of the reference section; naturally creating a Kempe's-esque section for electronics requires much work but may be a desirable goal.

Post up here and we can have a look at it.

Is there a module you have in mind?

Dave

Feb 19, 2009
6,357
727
4. ### Dave Retired Moderator

Nov 17, 2003
6,960
164
Thanks. I'll let Rob have a look at how feasible it would be implement such a feature. It does look like a diverse feature. Are you aware of it being used on other forums?

I can't see anything over at vB.org that would be suitable.

Dave

5. ### thatoneguy Thread Starter AAC Fanatic!

Feb 19, 2009
6,357
727
It is used on several, including vb.org, but I believe that is with the apache config, rather than a PHP module, I've found quite a few for Win32, none for linux. Not much experience with light, so I'm not sure if it is an option or not. Simply coloring/formatting it as PHP provides acceptable results.