Re: Motion Sensor with LED's

On 5 mar, 20:17, Jonathan Kirwan <jkir...@xxxxxxxxxxxxxx> wrote:
On 5 Mar 2007 12:41:05 -0800, "gethostbyn...@xxxxxxxxx"

<gethostbyn...@xxxxxxxxx> wrote:
You can use a simple infrared emitter diode and a photo-transistor
like detector. You need modulate the signal if you don't want to have
problems with other light/infrared sources like sunlight.

Optical filtering would help, as well.

Jon

How?

PH

.