[sdiy] Magnetic Reed Switches

[Paul Perry]

At 11:01 AM 3/07/04 +1000, Ken Stone wrote:

>One thing you should try is adjusting the position at which the magnet
>encounters the reed switch. The most sensitive spot is not smack in the middle.
>
Another thing is to use pieces of iron to 'focus' the magnetic field.
Try to arrange some iron so that the magnetic field is coupled
to the switch and back. Ideally, the sensitive spot of the reed is 
inside a gap in a closed magnetic path thru iron.

paul perry melbourne AUstralia