A long-neglected project on my to-do list is to do exactly the opposite with one of these. I want to use the circuit board to detect movement in front of it and

A long-neglected project on my to-do list is to do exactly the opposite with one of these. I want to use the circuit board to detect movement in front of it and use the motor output to close a relay instead of squirting smelly stuff. The relay would then trigger a button push on my wireless doorbell button and ring the doorbell if it detected movement. I really should get back on that.