Servo Pulser problem

[Acetronics2]

hey

im trying to do this
http://www.uoguelph.ca/~antoon/gadgets/servo3.htm
http://www.uoguelph.ca/~antoon/gadgets/servo3.gif

but i faced a problem

i bought all these
IC1 = LM555 Timer R1 = 2K7
R2 = 68K
C2 = 100nF
C3 = 100nF D1 = 1N4148, signal diode

but they dont have this
C1 = 390nF AND P1 = 2K7, potentiometer

the seller told me that they dont sell 390nF AND 2K7, potentiometer

so any one can help me?

Aly,

The total value of the cap must be .82µF ... on the drawing you had 3 possibilities INCLUDING 0.47 // 0.33 µF !!! There's enough room on the pcb to place 2 caps ...

If you use a twin 4.7K pot ( the 2 sections wired in // ) that will fit perfectly.

I use for this design an old 1 channel stick fitted with 4k7 pot ... but here, only 90° of rotation was used ...


Malc ... you begin to look like "Jetpr" ... R = R1*R2/( R1+R2 ) and C1//C2 = C1+C2 sounds sthg for you ???

Alain