hi,
a cafe has a problem, it keeps having its self service coffee stolen - the actual equipment, money and coffee its self.
i need help designing a pressure pad system to do a few things,
1 monitor the weight of the coffee flask so they can be alerted via a red right when its empty.
2 if there is no weight on that sensor then there will be very noticable alert to staff but not to customers, as the cash box or coffee flask possibly been stolen.
3 log when coffee is taken from the flask and money put into the box so it can be logged with a date and time.
number 1 and number 3 are not essental but would be good if possible the main idea is number 2.
it MUST be very descrete so as to not ruin the atmosphere of the cafe but effective so as to prevent theift.
i figured a simple presure pad would work but i dont know...