[Gruder]

An RC cir. Resistor and a cap. The equation to determine how fast you want the cap to charg and discharge is determined by the following eq.

Vc(t) = V(@infintiy) = [V(@time timer is turned on or off) - V(@infinity)]e -t/T

V = Voltage
e = natural log
-t/T = exponet of natural log
-t = time it takes cap to charge or discharge
T = R/C
R = Resistor value
C = Cap value

Hope this is not to confusing.

Gruder