Mónica Pedro

Input Devices

Back to main page

Image

I need to use image as input data for my machines, and to start understand how it works, I will use an olde Raspberrypi 3 model B V1.2 that I already have

RASPBERRY PI 3 MODEL B because this board seams to have lots of examples online for camera's

Raspberry SetUp

Started to create an working set with:

USB keyboard
USB mouse
HDMI screen
Raspberry power supply
- Download and install ETCHER
- Download the Zip file of Raspbian to my MAC from here Raspbian Doenloads
- Inserted the SD Card in my MAC
- Open ETCHER and select the ZIP file to go into the SD CARD

Raspian usefull Commands:

chech Raspbian OS version: cat etc/os-release

find files: find / -name xxxxxxname.extensionOfFileToSearchxxxxxx

Pi's IP Address: hostname -I

Raspian Remote Access using VNC - Virtual Network Computing

VNC (VIRTUAL NETWORK COMPUTING)

important steps:

ON Raspbian: sudo apt-get update
ON Raspbian: sudo apt-get install realvnc-vnc-server realvnc-vnc-viewer
ON Raspbian(to activate Interface Option\VNC\Yes: sudo raspi-config
ON Raspbian: hostname -I
ON my MAC: call the VNC
ON my MAC\VNC window: establish new connection withe Pi's IP
... and I can interact with Raspberry OS

Raspbian Hedless

to be able to program from my Mac....

VNC Server can create a virtual desktop, to provide me graphical remote access on demand. This virtual desktop exists only RaspberryPi's memory

ON Raspbian run vncserver and note the IP address
ON my MAC\VNC.app\create new connection: using the Pi's IP address

Camera on the Raspberry

I found this camera on the lab and decided to try it

for that I created a sccript on Raspbian terminal

USB CAM does not work anymore

I'd tried to use the FSWEBCAM command but got the error: stat: No such file or directory

looked online and tried: sudo modprobe bcm2835-v4l2... rumed and them fswebcam image.jog and got the same Error: stat !!!!

But... It was just UNPLUGED.... oHHHHH God

OpenCV on raspbian - for Edge detection

Fallowed the indications on Think RPI ~ Creative Raspberry Pi Area - Step 3 – Install softwares (for webcam and computer vision)

so I'd made the following in Console:

sudo apt-get update
sudo apt-get install guvcview
sudo usermod -a -G video pi
sudo modprobe uvcvideo
sudo apt-get update
sudo apt-get install cmake
sudo apt-get update
sudo apt-get install libopencv-dev
sudo apt-get install python-opencv
STOP here because the next step would be to test if OpenCV was whell installed using a C++ program, and I'd not yet worked with C programming

So changed the strategy and found a new possible path using Python

Edge Detection and OpenCv

but got some error's which seams to be related to Python Version and/or Raspbian Versio

I've installed on my R3 the Raspbian 9 named strech

I've installed the Python 3

... but the that code was written in Python2 grrrrrr!!!!!!

... so I'd to runn the code from the comand line: sudo python2.7 edge.py and it passes without any erros... IEE!!!!!

... but the windows doesn't show !!!!!

So lets back studing OpenCV fallowing this example: Adding a Trackbar to our applications!

I'll write the code using the Rasbpian Python 3 (IDE), but running the code from the comand Line with the comand sudo python2.7 NAMEANDEXTENSIONOFPYTHONFILE

it runned without erros... but now window apeared...

(-).(o)

_____________________________________________________________________

Python basics...

How to make a window with buttons in python

Python basics:

"__init__' is the constructor of a class; the __init__ method gets called when memory for the object is allocated.
self variable represents the isntance of the object itself. Most object-oriented languages pass this as an hidden parameter to the methods defined on an object; Python does not. We have to declare it explicitly. For instance when we cal the class A() simple without any arguments, Python creates an object, ans passes it as the first parameter to the __init__ method tip

Sensors connected to MYBOARD 01

I'll need to mey Final project these sensors:

Humidity and Temperature Sensor

Power supply 3-5V DC: When power is supplied to the sensor, do not send any instruction to the sensor in within one second in order to pass the unstable status. One capacitor valued 100mF cab be added between VDD and GND for power fltering.
Communication process: Serial interface (single-wire Two-Way: Single-bus data format is used for communication and suynchronization between MCU and DHT11 sensor. One communication process is about 4ms.

Moisture Sensor

Instructables on those sensors...

Previews Students works for inspiration

Leire Bereziartua - Input Devices where he uses a Moisture sensor

Suhail - Input Devices where she uses a temperature + humidty + Infrared

and to start playing with it through a ARduino UNO

the things I have in my home lab where:

Practicing the Milling of boards

Milling at Carvey machine from Inventables

Carvey 3D carving machine - User Manual

......... preparing the files..... passes by

FlatCam - to prototype the PCB

FlatCAM: Free and Open-source PCB CAM

setps:

after extracting all the files from Zip file made in Eagle , select the file (EAGLE layer) that will be sent to Milling
in tab OPTIONS:
... PROJECT OPTIONS - define mm
... APPLICATION DEFAULTS - define mm
if not doing the above FLatcam wil become strange
having selected that layer in PROJECT tab goto Tab SELECTED and set
.... Tool dia: 0.3
.... Width (#passes): 3
.... Pass overlap: 0.15000
.... and GENERATE GEOMETRY
back to PROJECT tab - select the new item _iso and goto tab SELECTED to set:
.... Cut size: -0.6
.... Travel Z: 2
.... Feed Rate: 200.0
.... Tool dia: 0.3
.... Spindle-Depth: 14000
.... and GENERATE
select the new item in PROJECTS tb _cnc and go to tab SELECT to set:
.... EXPORT GCODE, which will be file to Drag to Chilipeppr...

Chilipeppr

ChiliPeppr Hardware Fiddle

this is the program interfacing with the machine @ FCTFABLAB (Carvey from Inventables)

Steps

drag the Gcode File (made through Flatcam)
go out to windows file explorer window to connect the Serial port
came back to Chilipepper
Set the starting coordinates of the milling
--using X, Y and Z buttons on left, move the mill head to the X,Y and X of Copper Board
--when the light indicator on Milling machine is up...
Set the Zero out and reset all: refres Chilipepper page, disconnect USB port on PC, and Electricity of Carbvey machine... them turn on PC-USB, Machine and refresh Chilipepper Page
Test that the Zero is ok by: Lift up Z a lot
click Go to Zero with close ATENTION to verify that it's realy going to the right position....
.... if NOT - Quickly STOP the machine by removing the magnet on the door.. and resart all the positioning
run AUTO-LEVEL that will map all the Z's of the board
.... we can adjust the routing steps of auto-level
once terminated the Auto-level,
RUN by clicking the button RUN, and here's it workong...

----------------------

after 4 tries... its not done... ERRRRRRRR

And after soldering with lots of care... here it is...

Preparation

XXXXXXXXxxx x x x x xxxxxx x x x x x x x x x:

Execution

Started by ..............................