I have scoured these pages and more widely for a wireless activated device which would sit on or near a garden bird table and which would when a handheld switch was operated sound a frightening sound (distressed pigeon call) AND via a miniature 3v single revolution motor spindle create movement of say a few strands of silver foil essential to frighten particularly unwelcome species such as crows and pigeons. The sonic element I have achieved using a wireless doorbell from Siemens JSJS214 (replacing the MP3 chimes) but I am unable to take it further with the mechanical adaption. Clearly I need to detect the triggering of the sound and, perhaps via a relay, trigger a geared miniature 1 or 2 turn 3v motor which could reside within the empty barrel (spindle protruding through the side). I am convinced that within the overall idea lies a commercial possibility as a number of my friends say they would buy such a device if it were to come on the market. Sadly I can't find the circuit for this door alarm - is it likely to be complex? I would welcome interest from a student competent to take this forward either as an adaption or a new design.