Hi Phil
Thanks for nothing. If you had been a bit more accurate with your initial post there would have been no need to think that under powering this unit may have had something to do with your problem. A bit more detail in the initial query would be appreciated. I saw somewhere in my searches the unit you have has “Qwiic” appended to the model number. Can’t remember exactly where I saw this.
Unless you can change the speed of light on the fly or they do something funny with the numbers before you get them this has to be linear.
Cheers Bob
Add on:
The Qwiic version comes up on the Core site under a different SKU and a different description.
Garmin LIDAR-Lite v4 LED - Distance Measurement Sensor (Qwiic)
And in the text
“The LIDAR-Lite v4 Qwiic” in the first few words.
Cheers Bob
Hi Dan
I have been puzzling about where the number “246” came from. I could not relate this to the speed of light.
Then I had an thought. Back in the day before decimal we used, to cut a half wave dipole using the following formulas. 468 / f(Mhz) = length in feet. This allowed for the 5% “end effect” for each quarter wavelength at the ends. This dipole has 1 quarter wavelength at each end so the 5% can be applied to the total half wavelength. Now 468 without the 5% reduction is 492. Half this is 246.
Now all this relates to feet. I think both Garmin and Sparkfun (the Qwiic add on) are both USA who use the imperial Yards, Feet etc. Is there possibly some sort of a mix up here in calculating distance. I am presuming that is what the libraries do.
The above is the only thing I can associate the number 246 to.
EDIT: unless it is just 48000 / 195 = 246
Cheers Bob
Hi All
Add on:
The number “246” is the number of FEET light travels in one quarter of one microsecond.
Any clues here???
Cheers Bob
