Online Engineering Calculator Volta-2011

Free online Engineering Calculator Volta-2011 [1] (hereinafter – Calculator) could be a useful tool for high-school and college students, and electrical/electronic engineering professionals as well. It could run on practically any Internet-connected platform: desktop/notebook PC, tablet computers (Apple® iPad and likes) and mobile devices like iPhone®, iPod Touch, Google Android®-compatible devices, Blackberry®, etc.

Calculator is implemented as Rich Internet Application (RIA), similar to the Scientific Calculator ZENO-5000, described in the previous articles [2-4]. It utilizes the latest HTML 5/ CSS3 features. Computational engine is built on jQuery/Javascript, using exclusively the client-scripting technique: thus, the entire application could be stored on client’s machine and used autonomously in off-line mode, pretty much like in ZENO-5000[5].

Calculator extends the set of math functions, implemented in ZENO-5000, with the following domain-specific (Electrical/Electronic Engineering) functions, enabling the calculations of:

• AC Impedance (L and C), corresponding to 60 Hz (USA, most of Americas)
• AC Impedance (L and C), corresponding to 50 Hz (Europe, etc.)
• Parallel Resistance (also Inductance)
• Angular (radian) to Ordinary (cyclic) frequency conversion
• LC circuit Resonance Frequency

Calculator contains 6 multiplier buttons, corresponding to the standard engineering prefixes:

• k- kilo (k)
• M – Mega (M)
• G-Giga (G)
• m – milli (m)
• u – micro (u)
• n-nano (n)

In addition to this, Calculator contains the look-up tables of preferred values (aka standard E-Series) regarding the passive components (R, L and C) as per [6]:

• E6 (20% tolerance; rarely used)
• E12 (10% tolerance)
• E24 (5% tolerance; frequently used)
• E48 (2% tolerance)
• E96 (1% tolerance)
• E192 (better than 0.5% tolerance)

Sample calculations

Example 1: Calculate the equivalent resistance of 2k and 3k resistors, connected in parallel

• Step 1. Enter the value 2 using the on-screen numeric keypad, then click on multiplier *k, resulting in the value shown as: 2000
• Step 2. Click on the button “R||R”
• Step 3. Enter the second resistor’s value: click on numeric button3, then click on the multiplier button *k, so the value shown should be: 3000
• Step 4. Click on the “=” to get the result: 1200 (or 1.2k as per electrical engineering notation)

Example 2: Calculate the AC impedance of the 1 uF capacitor on 60 Hz

• Step 1. Enter the value 1 using the on-screen numeric keypad, then click on multiplier *u to convert the value to 0.000001
• Step 2. Click on the button “Zc” to get the results (in Ohm): 2652.5823848649225 (approx. 2.653 kOhm)

Example 3: Calculate the resonance frequency of parallel LC circuit: L=2mH, C=3nF

• Step 1. Enter the value 2 using the on-screen numeric keypad, then click on multiplier *m, so the value shown should be: 0.002
• Step 2. Click on the button “FLC”
• Step 3. Enter number 3, then click on the multiplier button *n, so the value shown should be: 3e-9
• Step 4. Click on the “=” to get the result (integer part): 64,974 Hz, or approximately 65 kHz

Example 4: Select the value of the resistor from standard E24 series

• Step 1. Click on the button “E24” and the corresponding look-up table of preferred values will roll down, as shown in the picture.

1.0    1.1    1.2    1.3    1.5    1.6
1.8    2.0    2.2    2.4    2.7    3.0
3.3    3.6    3.9    4.3    4.7    5.1
5.6    6.2    6.8    7.5    8.2    9.1

• Step 2. Upon completion the selection, click on the “CLe” button to close (roll-up) the table.

Afterword

Engineering Calculator Volta-2011 can run in any of major Web Browsers:

• Mozilla Firefox
• Internet Explorer
• Google Chrome
• Apple Safari

Some graphic rendering features may not work properly in previous versions of IE because of compatibility issue with the emerging HTML5 standard. It’s expected that starting with version IE9 the Browser will also support the HTML5.

References

1. Online Engineering Calculator Volta-2011
2. Online Scientific Calculator ZENO-5000
3. Scientific Calculator ZENO-5000, User Manual
4. Scientific Calculator ZENO-5000, Design Notes
5. Scientific Calculator ZENO-5000, Code Project
6. Preferred number (IEC 60063), wiki

Disclaimer: this content is provided on ‘AS IS’ basis for demo purpose without warranty of any kind

Copyright© 2011 Alexander Bell