mastevano
Newbie level 6
Hello Everyone! How do you calculate a second-order time constant. I have the following circuit with two caps and two resistors. Initially, everything is connected (the switch is closed). Then the switch (which is actually a FET) is opened. I would like to determine how long it takes for the uP pin to read a "low".
A schematic is attached (in visio format).
Added after 5 minutes:
For some reason it won't allow me to add an attachment. Basically the circuit has four legs in parallel.
1) A resistor to ground
2) A capacitor to ground
3) A resistor in series with a cap to ground.
4) Inductive Load
The node in between the cap and the resistor in leg 3 goes to the uP node.
A FET is turned OFF and I want to determine how long it will take for the uP to see that it is off.
A schematic is attached (in visio format).
Added after 5 minutes:
For some reason it won't allow me to add an attachment. Basically the circuit has four legs in parallel.
1) A resistor to ground
2) A capacitor to ground
3) A resistor in series with a cap to ground.
4) Inductive Load
The node in between the cap and the resistor in leg 3 goes to the uP node.
A FET is turned OFF and I want to determine how long it will take for the uP to see that it is off.