Electric Calculator app for iPhone and iPad

Electric Calculator provides 3 functionalities described as follows.
1. Attenuator Design
2. CR charge and discharge circuit design and analysis
3. Filter design.
4. Interactive calculation between transient time of signal and band width

1. Attenuator design
This application can calculate resister values for T-type or Pi-type attenuator circuit performing specified impedance and attenuation.

2. CR charge and discharge circuit design and analysis.
This calculator can calculate selected item from capacitor, resister, time delay or output level.
This is useful to design C-R delay circuit performing specified time delay at specified threshold level.
And this calculator shows the charge or discharge characteristic and cursor. The time value and level value shows the cursor position on characteristic graph. When you move the slider, the cursor tracks slider and time value and level value are updated.

3. Filter design
This application support 4 types filter design known as LPF, HPF, BPF and BEF.

4.Interactive calculation between transient time of signal and band width