On Mon, 2007-08-20 at 18:59 -0500, Matthew Mucker wrote:
> I'm working on a project that will incorporate the FT232RL chip from FTDI.
> 
> In the datasheet, they recommend a ferrite bead on the USB power supply line
> to the chip.
> 
> My question is: with the USB connector soldered to the PCB, and the chip
> soldered to the PCB, how do I get the bead in there?
> 
> I apologize if this is a naive question; my lack of electronics schooling
> may be showing, but I figure I have two choices:
> 
> 1) Add a wire jumper to the PCB and thread the bead on the jumper
> 2) This is a hobby board, not one for production. I don't need no stinkin'
> bead
> 
> Are either of these options the correct answer? What other answers are there
> that I haven't thought of?

Ferrite beads are very common. They come with "prebent" wires to mount
on a through-hole board. They are also available in SMT.

For a hobby board I'd try it without the bead, if I didn't have one
handy. My guess is the ferrite bead is likely there to reduce EMI
emissions to the outside. TTYL

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