Posting Photos in Lightroom CC

I’ve switched to using Adobe’s CC photo sharing facility for sharing photographs with others.  Although you can not add text, you can show a nice ‘light table’ image of all photos at once, and you can then click on photos that you like.

Here are the instructions on how to do this from Lightroom’s help:

Step 1 of 6
Sign in to Lightroom
From the Lightroom desktop app, click “Get started with Lightroom on mobile” in the top left corner of the workspace.
Click “Sign In” and enter your Adobe credentials or create an Adobe user ID and password, if you don’t already have one.

Step 2 of 6
Sync collections
When you sync a collection in Lightroom desktop, you share your photo collection on Lightroom on the web and in Lightroom on mobile.
In the Lightroom desktop app, click the arrow next to Collections to see a list of your photo collections. As you hover your mouse to the left of a collection, the Sync icon appears (as shown). Click the Sync icon for the collections you wish to share.
Step 3 of 6
View your collection on Lightroom on the web
Go to Lightroom on the web. On this page, select “Try Lightroom on the web” and sign in with your Adobe user ID and password.
Tip: To do this from Lightroom desktop, right-click (Windows) or control-click (Mac) the collection you wish to share, and in the context menu, select Lightroom mobile Links > View on web.

Posted in How To, Photography | Tagged , , | Leave a comment

BMP180 Barometric Sensor, Sparkfun Serial Seven Segment & Feather Cortex M0 Processor

Project for portable Arduino work that also allows integration and experimentation with BMP180 Barometric Sensor breakout board.  It also has a pushbutton input and a photo transistor, and a voltage divider to measure current.  I plan to use this in the future to measure current draw for Arduinos and also the KX3.

Original documentation is from Oct 6, 2016 and is recorded in the Green notebook.  This project incorporates some unusual libraries and should be a benchmark/standard for future projects.  The libraries include:
  • The hardware uses a small 5cm x 7cm substrate board, on which the feather and s7s is mounted.  The various components are also attached to the substrate
  • The BMP180 is attached to the feather breadboard area
  • The substrate board is attached to a Mintz tin by high strength loop and hook adhesive pads – on on Mintz tin,  and the other on the substrate

The software looks like:

  • Adafruit Unified Sensor Library
  • SERCOM Library to allow use of multiplexed hardware IO as the Feather does not do software serial (also includes pin Peripheral function)
  • Standard Seven Segment library, but uses SERCOM, not software serial
  • Arduino Code:  hwSer_180_s7s_f_nov12a, stored in the Ubuntu and Mac Book Air computers
  • The Feather sometimes requires the use of the reset button to load new software

The code looks like the following:

  • Setup  the serial ports, the pressure sensor, and the seven segment display
  • Displays the code date of 1112
  • Loop: gets sensor data (if valid), and then prints it to the console monitor and then formats it for display on the seven segment, and displays the pressure and temperature alternating every second. 
  • The temperature is in degrees f, and the pressure is in millibars

Schematic Diagram of the system:

 

 

Posted in Arduino, Commonplace, Hobbies, How To, Projects | Tagged , , , , | Leave a comment

Python on Pi

Recently, I have added a sensor shield (Sense Hat) to an Raspberry Pi3 that has an 8×8 array of neoPixel LEDs.  As a simple challenge, I wanted a python script to display the real time quotes of a stock, using the scrolling API that came with the shield.

Sense Hat & RPi3

This time I used a distributed development environment, and I think I will never go back to doing development on the Pi unless forced to do so.  I used Microsoft Visual Code to develop the python script, and then Filezilla to transfer the source to the pi.  After loading python updates, I then use ssh to run the script and the display is output on the shield.

The mechanical configuration consists of the Sense Hat simply plugging into the RPi, and the sandwich attached to a space frame made from aluminum robotics extrusions.  The RPi is attached to the space frame using the ultra strong hooks and loops bonding system by 3M.  Note that the system looks ‘upside down’.  This was intentional since it minimizes cables coming out of odd places, and improves the looks.

Steps:

  • SSH 10.0.0.xx -l pi /yes / password.  Fill in xx with the actual network address of the pi on your local LAN.
  • python py927.py.  This command executes the most current version on the pi.  This file also prints out the same data as being displayed on the serial console, if you choose to further debug the program.
Posted in Commonplace, Hobbies, How To, Raspberry Pi | Tagged , , | Leave a comment

Using nRF24 RF Wireless Link from Nordic

Another learning project based on this Nordic Semiconductor product, NRF24L01 chip.  Nordic, RF, 2.4 GHz part with really flexible and high bandwidth radio performance for digital sensor data.

Purchased a 6 pack from Amazon for very little Dollars – maybe only $4 per circuit board and trying to set up.  From the problem solving post from 5 years ago, here are some steps:

  • Review prior projects – have we done this before?
  • Look at Safari and Amazon for answers – are there books on this topic?
  • Research physical books – look at the physical library
  • Search internet – Arduino, Wikis, Specialist sites, then general search
  • Search YouTube – find gurus and experts who have series, then individuals

Well, I hit gold with the 4th bullet, internet search where I landed on an Arduino wikispaces site that has a number of posts on the nRF24L01 chip, including a page on how to solve problems with the device.

Although I was keen to dual bypass the Nordic breakout board and connect it the the 3.3 VDC pin of the Arduino Pro Mini (3.3 V, 8 MHz), it turns out that this probably was the problem.  I connected both devices to my lab supply of 3.3 VDC, and the test routines that I loaded worked immediately!  First time!

  • Routine:  YourDuinoStarter Example: Simple nRF24L01 radio
  • Source:  arduino-infowikispaces.com/Nrf24L01 – 2.4GHz – HowTo (check spaces!)

Now on to integrating this with a sensor for remote data logging.  Will be using BMP180 sensor to monitor pressure and temperature.

Posted in Arduino, How To, Problem Solving | Tagged , , , | Leave a comment

C++ Programming Errors

In working on some Arduino projects, the primary language of sketches is C++, though hidden under the Arduino IDE.  In order to be more efficient, I’d like to understand more about how errors creep into designs, so that they can be avoided in the future.

Early days in programming, syntax errors at compile time are more frequent, and many times they are a barrier – usually taking much less to debug than runtime errors, but time consuming nevertheless.

Compile Errors – Header

  • include the wrong header file
  • delay() not in scope (need to add <Arduino.h>
  • include header file after reference to type
  • not include header file for each function
  • no need to include file if in same folder as .ino file
  • SoftwareSerial object not declared in this scope (resolved by passing class objects as parameters)

Compile Errors – Scope

  • variable scope defined inside case statement (should be outside)
  • typo – printLN, should be println
  • typo – used wrong variable name (buttonTime versus button1Time)

Installation Errors

  • Should install ubuntu applications in Home, not in Downloads

Runtime Errors

  • Logical error – ‘getAge’ object should not be called until button pressed and flag set (keep logic simple)
  • Syntax error – did not update variable holding member data after updating it (avoid new variables)
  • Syntax error – referred to wrong member attribute (timePB versus _pinTime)

 

 

 

Posted in Arduino, How To, Problem Solving | Tagged , , | Comments Off

Arduino Installation IDE on Ubuntu 16.04

What a day installing and removing and installing the Arduino IDE on the new Z170/i5 computer that was built over the last three days.  I learned quite a bit on the journey and the purpose of this blog is to briefly highlight the steps and pitfalls.

  1. Downloaded Arduino IDE 1.7.10 for Linux64 (this was a mistake, because the Teensyduino application, which interfaces the IDE to Teensy 3.2 Arduinos is not compatible with 1.7, so I had to download 1.6.8).  READ ERROR MESSAGES from Teensyduino!
  2. Java was missing so I needed to install this – jre default
  3. Modified permissions of ‘dial out’ and ‘TTYACMO’ (note this varies from install to install) READ ERROR MESSAGES!
  4. Got AVRDude error messages because I did not select the right processor (selected Pro Mini 168 and should have been 368)  READ ERROR MESSAGES!
  5. Installed 1.6.8, installed Teensyduino 1.28, and then 49 rules – I put the Arduino app in the Home folder to prevent R/W error messages when they were in usr/local (though I now discovered the issue was probably not protection, but that I did not have 1.6.8 downloaded)

Thanks to Sliverhoof on Reddit & Snackeye’s blog post on installing Arduino and Teensyduino.

Posted in Arduino, Commonplace, Hobbies, How To, Problem Solving, Projects | Tagged , , | Comments Off

Mid Range Linux Box – Intel Skylake & Z170 Mobo

Background:  I have lived with the Ubuntu 14.04 system that I had installed on the Gigabyte GA990F – and lived to really enjoy programming the Arduino on that system more than working with a Mac or Windows machine.  While I have not tuned up the IDE toolchain like I have with a Mac system, using Textmate, I have gotten pretty proficient at using Linux.  However, I noticed that the way the SSDs were partitioned over time, that the Ubuntu partition only has 3 GB left, and that is too close for comfort… so in the spirit of learning and continuous improvement, I built a new system.  Also, adding fuel to the fire was that the Gigabyte Mobo was over 4 years old.

Components:  This is a mid range to mid range plus system (not quite gaming, but fairly fast) that relies on new components and CPU.  Here are the components (and cost, circa May 15, 2016):

  • Intel Core i5-6500 3.2 GHZ H4 LGA-1151, 6 MB Cache ($200)
  • Asus Z170 A, Using intel Z170 Controller, onboard HDMI, DDR4 ($160)
  • Samsung 850 EVO 250 GB SSD ($90)
  • Corsair DDR4 3000 MHz 2×8 GB Memory sticks ($80)

The total cost was $530 since I already had a power supply and built the system on a thin piece of wood.  Below is a snapshot of the component cables:

Asus Motherboard
Asus Z170 Intel Motherboard w/HDMI

Results:  After installing Ubuntu 16.06 LTS (I evaluated Ubuntu Mate, but did not really like the UI) I’m exceedingly happy with the performance.  I plan to do some benchmarks versus the GA990F system running Ubuntu 14.04.

Posted in Arduino, Commonplace, Hobbies, How To, Projects | Tagged , , , | Comments Off

Arduino Feather – Capacitance Project (Ver. 2)

 RCTiming_capacitance_meter
April 02, 2016, cap_feather_apr02; modified for 12 Bit ADC, including threshold increasing
Zero Voltage threshold to prevent hanging waiting for full discharge.
Adafruit Feather M0 Basic Arduino Board
Uses MICROSecond timer, not MILLISecond timer for greater precision and to measure caps below
1 nF in value.
1) There is a noticable error (DC offset from ADC of around 14 of 4096 full scale
2) Settling to full discharge so a non-zero threshold is set, ~50 count
3) ADC conversion time is about .5 milliseconds, so this is subtracted from measurement
4) Added loop counter Mar 27, so see if ADC compensation is correct
5) Added input selection via digital inputs
Derived from program from Arduino site, from Paul Badger 2008 Uses of RC time constants to
measure the value of a capacitor.
TC = R * C – The capacitor’s voltage at one time constant is defined as 63.2% of the charging voltage.
6)  Changed to nF printout, and also added A9 as input for 10M Charging R


Hardware setup (verbal schematic):
Test Capacitor between common point and ground
Test Resistor between chargePin and common point
220 ohm resistor between dischargePin and common point
Wire between common point and analogPin (A/D input)

Software:  Cap_feather_apr02, Win 10 GA9 machine, in Arduino folder and in DB>project folder

Platform: Feather M0 Core from Adafruit.

Components:  Resistors

Schematic: See above

Layout: See photo

Notes:

MetaData: In lab notebook (3/15-4/02) and in DB>Projects, and in Project 3 Ring Binder.

Posted in How To | Comments Off

Computer Overhaul

My GA99F system was getting krufty and was freezing frequently, so I decided that after 2 years to give it a brain transplant.  What really happened was a body & brain transplant.

What I learned in the process of going from the Win 7 (GA99F->Ubuntu 14.04, and then replacing Ubuntu Machine with GA990 Motherboard ->Win 10) to Win 10.

1.  To halt a Linux system, there are keys that can easily get its attention:  PrtScn (SysReq), Alt, and then a variety of letter keys, but shutdown is ‘o’.  VERY USEFUL.

2.  To stop the boot process on a GigaByte motherboard, and maybe others, there are two important secrets:  1.  connect keyboard DIRECTLY to the MB.  2.  press DEL key MULTIPLE times!

I realized that I really like this – playing under the hood.  However, it requires patience and joy in learning.  If you need a computer in a hurry, or at low cost, this is not the way to go.

 

Posted in How To, How To Process, Problem Solving | Comments Off

Arduino Feather – Capacitance and Seven Segment Project (Ver. 1)

The Feather is a relatively new Arduino variant from Adafruit which has a 48Mhz clock, a real DAC and improved ADC (12 bits) and more features than the Uno.  Below is a testbed that demonstrates some various hardware combinations:

Software:  There are two source files:

SSeg_feather_Mar15a for the Seven Segment demonstration with input on A1, and the SS display with a I2C serial interface.

Cap_feather_Mar15 – TBD.

Both on MacBook Air, in Arduino folders.

Platform: Feather M0 Core from Adafruit.

Components:  Sparkfun 4 digit seven segment display, 10K pot between 0-3.3v, connected to A1.

Schematic: Simple – SSeg to +3.3, ground; I2C via SDL, SCA, and 10K pot with variable wiper going to A1, 10uF bypass on supply.

Layout: See photo

Notes: Added averaging (10 samples) and 500ms delay so readout is legible.

MetaData: In lab notebook (3/15) and in GoogleDrive>Projects.

Posted in Arduino, Commonplace, Hobbies, How To | Comments Off