Cameron said:
Using a PIR sensor to switch a speaker.
Please..
How do I make the speaker emit a tone?
Best regards
Cameron
Drill & tap a narrow strip of plastic so you can mount an adjusting screw on
the front of the LS, then stick some self adhesive metal foil on the cone
and glue the plastic strip to the front of the LS so the screw can be
adjusted to just touch the foil. Wire the LS coil in series with the home
made buzzer contact and connect a battery. Adjustment of the screw will find
a point where energising the LS coil breaks the contact, when the contact
breaks the cone moves back into contact and the cycle repeats as long as
power is applied - note its polarity sensitive so if first try don't work
try reversing the battery.