Ant_Magma said:
I'm using ferrite beads to produce a clean voltage supply. The ferrite
bead i ordered looks like a hollow cylinder.
How do i connect this? Do i just use wires run a couple of turns
through the core and solder the wires onto the PCB?
Hi, Ant. I thought you were using SMT for this. I would guess you're
using the beads recommended by Bel in their appnote. Glad you asked
them -- they didn't specify a P/N.
So if you're going mixed, and they didn't specify number of winds,
place two lands for a jumper wire about 0.3" or 0.4" apart on your
board like a small axial resistor, then during assembly, thread a 22AWG
jumper wire through the donut, and insert the two ends of the jumper
into the pad holes. Cinch dowm the two ends, and solder. You're done
-- you've got your beads. If they did recommend number of winds, then
use the gauge they specified and do that number of turns through the
bead, and then solder in place as above. The beads will cut the edge
off the higher frequency stuff (above the dreaded "PowerPacket" band of
4 to 21 MHz).
Of course, if you're going SMT, it would have been better to use an SMT
ferrite bead. It mounts just like a small SMT inductor.
Good luck
Chris