some people are afraid of touching a doorbell!

so what if the doorbell touched its self for you!

will it work?
range 10cm to 60cm
a doorbell able to detect the presence of nearby objects upto half a meter without any physical contact.
beaming flood of pulsed infrared light into the street 24/7
a week end DIY project
will there be infrared 38KHz interference? with neighbors televisions?

as 38KHz infrared sensor designs, are a lot easy to make or use then ultrasonic sensor designs.
any touchless doorbell must run 24/7 without false alarms. from dogs or cats.
any thoughts are welcome