For engineers and students who design electric and electronic circuits
The calculable circuits are as follows:
1. Voltage Dividers (inputting output voltage or resistance ratio)
All circuits are capable of calculating up to 4 resistors.
- Calculate resistance values in entering input voltage, output voltage and current
- Display resistance values corresponded to a selected E-series number (E6 ~ E96)
- Display current and power of each resistor by pushing "Details" button
The calculable voltage dividers are follows:
1. 2 resistors
2. 3 resistors
3. 4 resistors
Procedure of resistance calculation
1. Select E-series number (E6 ~ E96)
2. Enter input voltage (Vin) in the frame
3. Enter output voltage (Vout) in the frame
4. Enter current (IR) in the frame
5. Select calculation priority ("Simple" or "Precision")
6. Display calculation result
* The upper figure is a screenshot of voltage divider with 4 resistors.
When output voltage (Vout) is entered in 3 or 4 resistors, the pop-up window is displayed for entering each output voltage (Vout2, Vout3 and Vout4) automatically.
1. Enter Vout2 in the frame
2. Enter Vout3 in the frame
3. Enter Vout4 in the frame
* The upper figure is a screenshot of voltage divider with 4 resistors.
In the previous page, push "Details" button, and then move to this page.
In this page, display calculated Vout and IR.
If you confirm power of each resistor, push each resistor symbol.
* The upper figure is a screenshot of voltage divider with 4 resistors.
Pop-up window is open, and then you can confirm power of each resistor.
* The upper figure is a screenshot of voltage divider with 4 resistors.
- Calculate resistance values that a tolerance of output voltage (Vout) and current (IR) become the minimum when you select calculation priority "Precision"
In this page, select calculation priority "Precision".
Display calculation result with parallel circuits.
If you confirm parallel circuits, push each resistor symbol.
* The upper figure is a screenshot of voltage divider with 4 resistors.
Pop-up window is open, and then you can confirm resistance values of parallel circuits.
* The upper figure is a screenshot of voltage divider with 4 resistors.
Display calculation result that reduce a tolerance of output voltage (Vout) and current (IR) to minimum.
* The upper figure is a screenshot of voltage divider with 4 resistors.
- Calculate resistance values in entering input voltage, resistance ratio and current
- Display resistance values corresponded to a selected E-series number (E6 ~ E96)
- Display current and power of each resistor by pushing "Details" button
The calculable voltage dividers are follows:
1. 2 resistors
2. 3 resistors
3. 4 resistors
Procedure of resistance calculation
1. Select E-series number (E6 ~ E96)
2. Enter input voltage (Vin) in the frame
3. Enter resistance ratio (R1:R2 or R1:R2:R3 or R1:R2:R3:R4) in the frame
4. Enter current (IR) in the frame
5. Select calculation priority ("Simple" or "Precision")
6. Display calculation result
* The upper figure is a screenshot of voltage divider with 4 resistors.
When resistance ratio is entered, the pop-up window is displayed for entering each ratio (R1, R2, R3 and R4) automatically.
1. Enter R1 in the frame
2. Enter R2 in the frame
3. Enter R3 in the frame
4. Enter R4 in the frame
* The upper figure is a screenshot of voltage divider with 4 resistors.
In the previous page, push "Details" button, and then move to this page.
In this page, display calculated Vout and IR.
If you confirm power of each resistor, push each resistor symbol.
* The upper figure is a screenshot of voltage divider with 4 resistors.
- Calculate resistance values that a tolerance of output voltage (Vout) and current (IR) becomes the minimum when you select calculation priority "Precision"
In this page, select calculation priority "Precision".
Display calculation result with parallel circuits.
If you confirm parallel circuits, push each resistor symbol.
* The upper figure is a screenshot of voltage divider with 4 resistors.
Display calculation result that reduce a tolerance of output voltage (Vout) and current (IR) to minimum.
* The upper figure is a screenshot of voltage divider with 4 resistors.
- Calculate divided resistance values in entering a combined resistance values
- Display resistance values corresponded to a selected E-series number (E6 ~ E96)
- Only tap on a unit button directly when a unit of resistance is changed (Ω or kΩ or MΩ)
- Display current and power of each resistor when input voltage is entered in the detail page
The calculable series circuits are 2, 3 and 4 resistors.
Procedure of resistance calculation (2 resistors)
1. Select E-series number (E6 ~ E96)
2. Enter combined resistance value (R0) in the frame and select unit button (Ω or kΩ or MΩ)
3. Display calculation result
* When you want to calculate 3 or 4 resistors, you just swipe the middle of the page.
Procedure of resistance calculation (3 resistors)
1. Select E-series number (E6 ~ E96)
2. Enter combined resistance value (R0) in the frame and select a unit button (Ω or kΩ or MΩ)
3. Display calculation result
* When you want to calculate 2 or 4 resistors, you just swipe the middle of the page.
Procedure of resistance calculation (4 resistors)
1. Select E-series number (E6 ~ E96)
2. Enter combined resistance value (R0) in the frame and select a unit button (Ω or kΩ or MΩ)
3. Display calculation result
* When you want to calculate 2 or 3 resistors, you just swipe the middle of the page.
Procedure of resistance calculation (Auto display page)
1. Select E-series number (E6 ~ E96)
2. Enter combined resistance value (R0) in the frame and select a unit button (Ω or kΩ or MΩ)
3. Display calculation result
The display switches from 2 to 4 resistors according to result that reduce a tolerance of combined resistance value (R0) to minimum.
* When you want to calculate fixed 2, 3 or 4 resistors, you just swipe the middle of the page.
In the previous page, push "Details" button, and then move to this page.
In this page, display calculated R0, and calculate current and power of each resistor.
Procedure of current and power calculation
1. Enter input voltage (Vin) in the frame
2. Display calculated current and power of each resistor
- Calculate divided resistance values in entering a combined resistance values
- Display resistance values corresponded to a selected E-series number (E6 ~ E96)
- Only tap on a unit button directly when a unit of resistance is changed (Ω or kΩ or MΩ)
- Display current and power of each resistor when input voltage is entered in the detail page
The calculable parallel circuits are 2, 3 and 4 resistors.
Procedure of resistance calculation (2 resistors)
1. Select E-series number (E6 ~ E96)
2. Enter combined resistance value (R0) in the frame and select a unit button (Ω or kΩ or MΩ)
3. Display calculation result
* When you want to calculate 3 or 4 resistors, you just swipe the middle of the page.
Procedure of resistance calculation (3 resistors)
1. Select E-series number (E6 ~ E96)
2. Enter combined resistance value (R0) in the frame and select a unit button (Ω or kΩ or MΩ)
3. Display calculation result
* When you want to calculate 2 or 4 resistors, you just swipe the middle of the page.
Procedure of resistance calculation (4 resistors)
1. Select E-series number (E6 ~ E96)
2. Enter combined resistance value (R0) in the frame and select a unit button (Ω or kΩ or MΩ)
3. Display calculation result
* When you want to calculate 2 or 3 resistors, you just swipe the middle of the page.
Procedure of resistance calculation (Auto display page)
1. Select E-series number (E6 ~ E96)
2. Enter combined resistance value (R0) in the frame and select a unit button (Ω or kΩ or MΩ)
3. Display calculation result
The display switches from 2 to 4 resistors according to result that reduce a tolerance of combined resistance value (R0) to minimum.
* When you want to calculate fixed 2, 3 or 4 resistors, you just swipe the middle of the page.
In the previous page, push "Details" button, and then move to this page.
In this page, display calculated R0, and calculate current and power of each resistor.
Procedure of current and power calculation
1. Enter input voltage (Vin) in the frame
2. Display calculated current and power of each resistor
- Calculate divided resistance values in entering a combined resistance values
- Display resistance values corresponded to a selected E-series number (E6 ~ E96)
- Only tap on a unit button directly when a unit of resistance is changed (Ω or kΩ or MΩ)
- Display current and power of each resistor when input voltage is entered in the detail page
The calculable combination circuits are 4 resistors.
Procedure of resistance calculation (R1 and R2 in parallel, R3 and R4 in parallel)
1. Select E-series number (E6 ~ E96)
2. Enter combined resistance value (R0) in the frame and select a unit button (Ω or kΩ or MΩ)
3. Display calculation result
* When you want to calculate another combination circuit, you just swipe the middle of the page.
Procedure of resistance calculation (R1 and R2 in series, R3 and R4 in series)
1. Select E-series number (E6 ~ E96)
2. Enter combined resistance value (R0) in the frame and select a unit button (Ω or kΩ or MΩ)
3. Display calculation result
* When you want to calculate another combination circuit, you just swipe the middle of the page.
In the previous page, push "Details" button, and then move to this page.
In this page, display calculated R0, and calculate current and power of each resistor.
Procedure of current and power calculation
1. Enter input voltage (Vin) in the frame
2. Display calculated current and power of each resistor
1. Because standard resistors are used and precision of calculation is ensured, the following restrictions are set up.
- Range of resistance value: 1Ω ~ 10MΩ
"< 1Ω" is displayed when resistance value is less than 1Ω, "> 10MΩ" is displayed when resistance value is more than 10MΩ.
- Range of resistance ratio (R1/R2 or R1/R3 or R1/R4 or R2/R3 or R2/R4 or R3/R4) : 0.1 ~ 10 (except for Voltage Dividers)
It has restricted so that it may become the above range automatically by the input text box.
2. Although the best performance is achieved, a lot of calculation time is required in E48 and E96.
In the legacy models of iPhone, iPad and iPod touch, it may take about half a minute until the calculation is completed.
Voltage Dividers
Selectable E-series number
E6, E12, E24, E48, E96
Input range
Voltage: 0.001 ~ 99999V
Current: 0.001 ~ 99999mA
Ratio: 1 ~ 99999
Output range
Resistance: 1Ω ~ 10MΩ
Details page
Current: 0A ~ 99999YA
Power: 0W ~ 99999YW
Series Circuits
Selectable E-series number
E6, E12, E24, E48, E96
Input range
Resistance: 0.001Ω ~ 99999MΩ
Details page
Voltage: 0.001 ~ 99999V
Output range
Resistance: 1Ω ~ 10MΩ
Details page
Voltage: 0V ~ 99999V
Power: 0W ~ 99999YW
Accuracy
2 resistors
E6: ±6.30%
E12: ±2.08%
E24: ±1.05%
E48: ±0.252%
E96: ±0.103%
3 resistors
E6: ±2.65%
E12: ±0.741%
E24: ±0.351%
E48: ±0.0407%
E96: ±0.0301%
4 resistors
E6: ±1.23%
E12: ±0.322%
E24: ±0.209%
E48: ±0.0216%
E96: ±0.0185%
Parallel Circuits
Selectable E-series number
E6, E12, E24, E48, E96
Input range
Resistance: 0.001Ω ~ 99999MΩ
Details page
Voltage: 0.001 ~ 99999V
Output range
Resistance: 1Ω ~ 10MΩ
Details page
Current: 0A ~ 99999YA
Power: 0W ~ 99999YW
Accuracy
2 resistors
E6: ±6.30%
E12: ±2.05%
E24: ±0.858%
E48: ±0.239%
E96: ±0.0858%
3 resistors
E6: ±2.64%
E12: ±0.568%
E24: ±0.149%
E48: ±0.0193%
E96: ±0.00307%
4 resistors
E6: ±1.04%
E12: ±0.180%
E24: ±0.0184%
E48: ±0.00119%
E96: ±0.0000855%
Combination Circuits
Selectable E-series number
E6, E12, E24, E48, E96
Input range
Resistance: 0.001Ω ~ 99999MΩ
Details page
Voltage: 0.001 ~ 99999V
Output range
Resistance: 1Ω ~ 10MΩ
Details page
Voltage: 0V ~ 99999V
Current: 0A ~ 99999YA
Power: 0W ~ 99999YW
Accuracy
R1 and R2 in parallel,
R3 and R4 in parallel
E6: ±0.591%
E12: ±0.0865%
E24: ±0.00743%
E48: ±0.000579%
E96: ±0.0000300%
R1 and R2 in series,
R3 and R4 in series
E6: ±0.560%
E12: ±0.125%
E24: ±0.0230%
E48: ±0.000886%
E96: ±0.000245%