Ohms Law Calculator: Ohms (Resistance): Voltage: Milliamps: 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
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 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);