[Dprglist] VL53L sensors

[Pat Caron]

Hi all, this is a document explaining how the vl53l1x spads are oriented
and selected.
https://www.pololu.com/file/0J1507/VL53L1X-UM2356.pdf
...Pat C

On Wed, Dec 15, 2021 at 11:53 AM secretary--- via DPRGlist <
dprglist at lists.dprg.org> wrote:

> I am a big fan of the Pololu Distance Sensor with Pulse Width output, 130
> cm max range, part #4071. They are very easy to use and work well. This
> sensor is a breakout board for one of the ST VL5xxxx sensors (do not know
> which one) and by changing some 0 ohm resistors around it can be configured
> to any sensor in Pololu's offerings at
> https://www.pololu.com/category/283/pololu-digital-distance-sensors.
>
> Right now, they are my favorite IR sensor.
>
> Regards,
> Doug P.
>
> On Wed, Dec 15, 2021 at 8:38 AM jesse brockmann via DPRGlist <
> dprglist at lists.dprg.org> wrote:
>
>> FYI: pololu.com also carries some of these sensors and also many others
>> as well.
>>
>> https://www.pololu.com/category/220/lidar-time-of-flight-range-finders
>>
>>
>> Jesse
>>
>> On Wed, Dec 15, 2021, 4:13 AM Paul Bouchier via DPRGlist <
>> dprglist at lists.dprg.org> wrote:
>>
>>> We had a discussion about the VL53 family of IR proximity sensors at
>>> RBNV last night, and we were unsure of the differences between e.g.
>>> VL53L1X, VL53L1 (no X) etc. This st page has a family decoder chart:
>>>
>>> https://www.st.com/en/imaging-and-photonics-solutions/time-of-flight-sensors.html
>>>
>>> In a nutshell, it looks like:
>>> VL53L0CX is 200cm single zone
>>> VL53L1CX is a 400cm single-zone programmable FoV
>>> VL53L1CB is 800cm multi-zone/multi-target programmable FoV (looks like
>>> best of all - what's the downside?) 27 degree max FoV
>>> VL53L3CX is 500cm multi-zone/multi-target with close distance detection
>>> VL53L5CX is 400cm multi-zone/multi-target Wide FoV: 64 degrees
>>>
>>> Sparkfun sells the VL53L3CX, VL53L1X and VL53L5CX, and some have arduino
>>> libraries, some don't. They refer to the VL53L1X as "venerable", aka old,
>>> single-zone. I only find the VL53L0X and VL53L1X (single-zone) sensors on
>>> Amazon.
>>>
>>> It seems to me the VL53L1CB is also known as VL53L1 (no X). Someone at
>>> ST ought to be shot for defining VL53L1 and VL53L1X part numbers that have
>>> such different characteristics but only differ in part number by inclusion
>>> or not of X.
>>>
>>> It looked like David had the VL53L1 version, so presumably VL53L1CB. Not
>>> sure about Pat.
>>>
>>>
>>> [image: image.png]
>>>
>>> This diagram is also helpful - it shows that single-zone vs. multi-zone
>>> are really for different applications.
>>> [image: image.png]
>>> Single-zone ranging is good for e.g. liquid levels, but programmable FoV
>>> gives flexibility by narrowing the FoV used to report a single zone range,
>>> Multi-zone & multi-target give more XYZ detail. Multi-zone refers to
>>> multiple regions of interest in the XY plane. Multi-target seems to refer
>>> to objects at different depths within a single region of interest - if
>>> they're separated in Z by more than 80cm it will report up to 3 of them -
>>> it histograms the arrival times and bucket-izes range readings.
>>>
>>> These are pretty sophisticated sensors! The driver even loads the device
>>> firmware into the chip! Hats off to Pat for getting it to do ranging. As
>>> illustrated by the discussion last night, there's a lot to learn about
>>> these things.
>>>
>>> Paul
>>>
>>>
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