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bodysaffa said:Hi Folks,
Just looking at Time Constant of Capacitors.
T = RC
Easy enough, change R or C and change T but...
What is the effect of voltage?
I've looked at several sources and I don't see any mention of it.
zachtheterrible said:how does one do this calculation?
T, is that in seconds?
R, in ohms?
C, in picofarads?
Obviously this is not right cuz 100ohms X 1000pf=100,000 seconds. this i know is not true :lol:
Styx said:R*C give you the time to 63% of full charge or one T period
You didn't choose picoseconds, or picoohms, so why choose picofarads?.
Styx said:int(e^x,y) gives you y*e^x + C
bodysaffa said:I realized answer right after I sent the question.
But on the other hand the circuit was a relaxation oscillator, with a neon lamp.
So increasing the voltage has the effect of decreasing the resistance and increasing the rate of flashing. The cap fills up faster.
I assume in filter circuits the voltage is held constant, so the variables are just C and R.
Nigel Goodwin said:So with a 10V supply it will take T seconds to reach 6V, with a 100V supply it will take T seconds to reach 60V.