Ok its not really Purple but the rest it accurate. The EYE is the LDR " Light Dependent Resistor" and it counts people.Operation:
A laser beam is directed across a doorway. The LDR is on the receiving end of the laser on the other side of the doorway.
When a person goes through the doorway and breaks the beam the counter is incremented by a count of 1.
Scene it counts the person coming and going, that's 2 counts for 1 person i just divide by 2 at the end of the day, or at anytime to get the true count of people.
It is not fool proof, sometimes it double counts. But sometimes 2 people go out at the same time and only counts as one. So i figure it averages out. Acknowledgements:
First and foremost this Instructable would not be without the help and coding expertise of frollard
He is amazingly quick and precise.
There is a lot of knowledge here and they are willing to share that knowledge to help us learn.
Some of the people i have personally been involved with are: iceng
, He was the first one to follow my page. Him and steveastrouk
were the first to help me through an electronics question. I was happily surprised when they both answered my questions clear to the very end of the discussion. Others include: maewert
who has some 30 years of coding experience and it shows, ignoblegnome
, Phil B
. These are not in any particular order and if i have forgotten somebody i am sorry.
OK on with the build.