Working on a project for a handheld object using ultrasonic sensors that are angled at a 45 degree angle both upwards and downwards these sensors have their own distance range trigger zones which of course onyl trigger if something goes in range or out of their range
The upward sensor works on objects that come into its range.
Whilst the downward sensors works on surfaces that leave the range of the sensor.
As it is a handheld device it will most likely get passed among users of varying heights so I'm looking for a simple altimeter that I can add to my device that will be able to read in the current altitude of the device and then I can use that data to re-calibrate the sensors to the new height reading.
I'm also using a photocell sensor to activate lights on the device when it gets particularly dark. Now would anyone be able to recommend a photocell sensor that would be the next stage up from a micro photocell.