Ohms Law Calculator:
Ohms (Resistance):
Calculate
Voltage:
Calculate
Milliamps:
Calculate
Resistors in Series:
R1 Ohms:
R2 Ohms:
Input Voltage:
Timing Calculator:
Milliseconds:
Hz
Wave Length (feet)
Wave Length (1/2)
Wave Length (1/200)
Resistor Finder:
Input Voltage:
Enter Input Voltage Here
Desired Voltage:
Enter Input Desired Voltage Here
Known R1 Ohms:
Enter R1 Ohms Here
Known R2 Ohms:
Enter R2 Ohms Here
Click ggr1 => Creates the Array
Then Click gg1 => Displays the Results
R1 (Ohms)***R2 (Ohms)***Volts***mA***mW
Low Pass Filter Calculation Using Capacitor
#001
Enter Input Cut-Off Frequency = 100 kHz
#002
Enter Capacitor = 10 nF
#003
This is the Resistor Needed = 159.155 Ohms
Given the Frequency and Capacitor
Here is the formula:
c1 = Cut off Frequency = 100 kHz
c2 = Capacitor = 10 nF = 10/(10^9);
Resistor Neede = 1/(2*Pi*c1*c2)
#001
Enter Frequency Wanted = 5 kHz
#002
Enter Capacitor = 10 nF
#003
Capacitor Reactance = 3183.101 Ohms
Here is the formula:
c1 = Frequency Wanted = 5 kHz = 5000 Hz;
c2 = Capacitor = 10 nF = 10/(10^9);
Reactance Xc = 1/(2*Pi*c1*c2)
#001
Enter Input Volts
#002
Enter Capacitor Reactance = 3183 Ohms
#003
Enter Resistor at Frequency (100 Hz) = 160 Ohms
#004
Result = Output Volts = 11.994 Volts
This demonstrates an example that
filters out most frequencies above 100 kHz
but keeps the voltage the same out as in.
and keeps the 5 kHz frequency.
Here is the formula:
c1 = Input Volts = 12;
c2 = Capacitor Reactance = 3183 Ohms;
c3 = Resistor at Frequency (100 kHz) = 160 Ohms;
Let c4 = SqRt(c2*c2 + c3*c3);
Volts Out = (c2/c4)*(Volts In);