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Pimoroni Οπτικός Αισθητήρας Κίνησης - PMW3901

Κωδικός:

13-00012937

Part Number: PIM453

ΚατασκευαστήςPimoroni Part NumberPIM453

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This fancy optical flow sensor detects motion of surfaces in front of it, from ~80mm to infinity! It's great for DIY drone builds, and it's compatible with our new Breakout Garden HAT with SPI.

The PMW3901 is a crafty little sensor that uses a low-resolution camera and some clever algorithms to detect motion of surfaces. A great use for it is detecting and correcting for drift of a drone by looking for x/y motion of the ground below.

ΤΟ ΠΑΚΕΤΟ ΠΕΡΙΕΧΕΙ

MAX30105 breakout
1x7 male header
1x7 female right-angle header

Connecting to your Raspberry Pi

If you're not using our Breakout Garden HAT with SPI, then this is how to connect your Optical Flow Sensor Breakout up to your Raspberry Pi. Our library is set up to use the front SPI slot by default: BCM 7 for CS, BCM 11 for SCK, BCM 10 for MOSI, BCM 9 for MISO, and BCM 19 for the INT pin.

Here's which pins to connect between your Optical Flow Sensor Breakout and your Pi's GPIO (note that it's BCM pin numbering):

3-5V to any 5V or 3V pin
CS to BCM 7
SCK to BCM 11
MOSI to BCM 10
MISO to BCM 9
INT to BCM 19
GND to any ground pin

You can of course use other pins but you'll have to change them accordingly when you instantiate the sensor in your code.

PMW3901 optical flow sensor
Two white LEDs on-board for illumination
Frame rate: 121 FPS (frames per second)
Speed: 7.4 rad/s (radians per second)
Field of view: 42°
Range: ~80mm to infinity

6mA typical current draw
SPI interface
3.3V or 5V compatible
Reverse polarity protection
Compatible with all models of Raspberry Pi and Arduino
Dimensions: 24x24x5mm

Software

We've put together a Python library to use with your Optical Flow Sensor Breakout. It makes reading the x/y motion values and their magnitude really straightforward.