Ohms Law Calculator:








Resistors in Series:








Timing Calculator:











Resistor Finder:
Enter Input Voltage Here


Enter Input Desired Voltage Here


Enter R1 Ohms Here


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);