suicidalmonkey
Member
Sorry about the subject, I know it's a bit ambiguous but I can't think of anything else to call it.
The shop I work at uses a laser across the door that chimes when someone walks through and breaks the beam.
This gets irritating because it chimes every time someone walks in or out.
I want to modify his setup to include two lasers (10 - 20 mm apart) and set to chime when someone enters the shop and not when they exit.
Can anyone help with a circuit, keywords I can search on google or a different idea such as a PIR detector?
Thanks in advance
The shop I work at uses a laser across the door that chimes when someone walks through and breaks the beam.
This gets irritating because it chimes every time someone walks in or out.
I want to modify his setup to include two lasers (10 - 20 mm apart) and set to chime when someone enters the shop and not when they exit.
Can anyone help with a circuit, keywords I can search on google or a different idea such as a PIR detector?
Thanks in advance