You know those electronic sign boards that show how many parking lots are available within each car park?
They used to be a rarity and maybe even a novelty? Today, they are everywhere! Perhaps accounting for a large portion of the INCREASES of the parking charges since they all need to be fed with electricity and we all know that fuel prices increase = increase in the cost of electricity....
I used to be curious how do these sensors work, I bet my mum is still trying to figure that out... technology is just too incomprehensible for her (she's still trying to understand what sms and internet really mean... hahaha... I dun blame her, she came from the generation where they have to get water from the well, then they have piped water at village chef's compound, they used to sew, read, cook in kerosene lamps and then they had lights! they used to spread information by the word of mouth and then they had radio!! and black/white tv and now LCD tv.... If I were in her shoes, I would have given up trying to understand technology long ago... but wait, isnt that what she has done?? hahahhahaha)
So one day, when we did not have to dash into the car and rush off from the car park, we finally figured out how it works! hee hee
There's a sensor that detects if there's anything underneath it. Must be some sort of light/frequency/infra-red stuff.. if the signal is blocked, then its "thinks" that there's a car in the lot.
This sensor is linked to a green/red light at the front of the lot. So that we can just glance along the row of the car park and quickly find the green lights for available parking lot!
The sensor is also linked to some central panel where it will calculate how many available lots are there in each level of the car park. Quite cool hor?
How did we find out all these????

just stand under the sensor lor.... hahahhaha
Labels: car park, gadgets