[carpe] 2016-05-17 CARPE Conscribillati

Tue May 17 23:02:55 EDT 2016

2016-05-21 12:00 to 15:00
Powell Maker Space
Water Bottle Rocket Launch
Powell Village Green Park
Josh Wooten
http://www.meetup.com/tech-terminal/events/230293482/
They really need RSVP if you go for park permits.

Thanks to Pillar and Erin for their hospitality.
They hosted the CARPE meeting at The Forge.

2016-05-17 18:00 CARPE meeting at Pillar's "The Forge".
http://www.meetup.com/techlifecolumbus/events/230660408/

some CARPE contact stuff

    samthinko at gmail.com
    mailing list: lists.colug.net/mailman/listinfo/carpe
    twitter: @CARPEmeetup
    github.com/CARPEmeetup

    what other contact info is missing?

Thumbs Up for Ubuntu MATE 16.04 for the Raspberry Pi
http://fossforce.com/2016/04/thumbs-ubuntu-mate-16-04-raspberry-pi/

FPGA-driven board is an Arduino Uno clone on steroids
http://hackerboards.com/fpga-driven-board-is-like-an-arduino-uno-on-steroids/

Octa-core Cortex-A53 hacker SBC sells for $60
http://hackerboards.com/octa-core-cortex-a53-hacker-sbc-sells-for-60-dollars/

Here's The Programming Game You Never Asked For
http://blog.codinghorror.com/heres-the-programming-game-you-never-asked-for/

>From NAND to Tetris
Building a Modern Computer From First Principles
http://nand2tetris.org/
Could this be implemented in the FPGA that some Arduino derivatives have?

pcDuino 3Nano closeout at Ucenter $33.99
http://www.linksprite.com/linksprite-pcduino3-nano/

Displio: Wireless e-ink display with wifi.
device is thick, hopefully it is thick
What open source, if any, does it have?
If they drop the service, does it become a useless brick?
Latvia versus Lithuania
https://www.kickstarter.com/projects/914874115/displio-wifi-display-that-tracks-whats-important-t
wp:The Draugiem Group
How much Hungarian is spoken in Latvia?
wood is nice
Only user input is accelerometer: tap, shake, rotate
output: display and speaker

It's interesting that snap* will be used wider than just for embedded stuff.
Unity 8 and Snaps Are the Future of the Ubuntu Desktop, After Ubuntu 16.10
http://news.softpedia.com/news/unity-8-and-snappy-are-the-future-of-the-ubuntu-desktop-after-ubuntu-16-10-503735.shtml

raspberry pi tube amp

Microcenter has Pine 64 computers.
They have them early, because they were in on its Kickstarter.
They do that with many little things.
Early stock comes from Kickstarter.

Microcenter has hummingboards on clearance
    $80 1 core, 512 MB
    $100? 2 core, 1 GB
    $$$$ quad core, 4 GB
https://www.solid-run.com/

Pi Sense Hat $30 at Microcenter
    air pressure & temperature
    humidity & temperature
    9 degrees of freedom accelerometer
    crude joystock (5 buttons)
    8 by 8 array of RGB LEDs

This is what a root debug backdoor in a Linux kernel looks like
http://www.theregister.co.uk/2016/05/09/allwinners_allloser_custom_kernel_has_a_nasty_root_backdoor/
What backdoors are in the Allwinner hardware itself?

youku.com

$35 open source RK3288 hacker SBC hits Indiegogo
http://hackerboards.com/35-dollar-open-source-rk3288-hacker-sbc-hits-indiegogo/

Raspbian Switches to Linux Kernel 4.4 LTS, Gets Bluetooth UI and SD Card Copier
http://news.softpedia.com/news/raspbian-switches-to-linux-kernel-4-4-lts-gets-bluetooth-ui-and-sd-card-copier-504031.shtml

QEMU 2.6 Officially Released with Raspberry Pi 2 Emulation Support, New Features
http://news.softpedia.com/news/qemu-2-6-officially-released-with-raspberry-pi-2-emulation-support-new-features-504009.shtml

Tiny $1 STEM-oriented hacker board hits Indiegogo
http://hackerboards.com/tiny-1-dollar-stem-oriented-hacker-board-hits-indiegogo/

BeagleBone Green Wireless adds WiFi, BLE, USBs
http://hackerboards.com/beaglebone-green-wireless-adds-wifi-ble-usbs/

New Arduino Srl SBC merges Arduino, WiFi, and Linux
http://hackerboards.com/new-arduino-srl-sbc-merges-arduino-wifi-and-linux/

raspberry pi power monitoring add-ons

pack

    Pi0

    Pi3
        power supply
        extension cord
        outlet cube
        USB power cord

        new SDHC with 2016-05-10 Raspian Jessie

        USB keyboard
        USB mouse
        USB to SDHC adapter
            microSDHC to SDHC adapter

        HDMI cable

    Pi camera
        long cable

        eye loupe
        reading glasses

    sensor
        ez-clips
        chip pin-out printout
        GPIO pin-out printout

    AA battery

    many alligator clip wires

    laser pointer

prepare

    configure new Raspian

    install current working software

    install software that did not work

    install software that does continued start

    install enough of software to replicate problem

show

    be kind to your scope

        no sharp bends on scope probe cables
        minimal brightness
            dimmest when not using, OK to leave scope on

    dot (XY mode)
        move dot with a battery

    .5 div/s
        play with battery

    60 Hz hum
        ext trigger / auto
        INT / auto
        INT / norm

    okular ~/MLX90620ESF-BAB-000-TU.pdf
        p6 pinout
        p10-p11

    pinout https://pinout.xyz/
    camera commands
    https://www.raspberrypi.org/documentation/raspbian/applications/camera.md

    initialization sequence
        read eeprom
            show single shot flash
                ~/bad/dump_mlx90621_eeprom_one_as_plain_hex f7
            repeat
            while true; do ~/bad/dump_mlx90621_eeprom_one_as_plain_hex f7;done
        write oscillator trim value
            ~/bad/just_set_osc_trim
        read oscillator trim value
            ~/b2/bad_read_osc_trim
            while true; do ~/b2/bad_read_osc_trim; done
    reading configuration register

    demo
        do-mlx

        abc

        cd heat
        source env/bin/activate
        logfile='/home/pi/temperature.log'
        tail -n "$LINES" -F "$logfile" | /home/pi/heat/verypretty.py

        cd heat
        source env/bin/activate
        cd heatsite/
        python manage.py runserver 0.0.0.0:8000

        http://localhost:8000/polls/hot.html

        Fiddle about, explore signals on Pi.

camera setup was terrible

    cieling lights were terrible
        so lay scope horizontally on table (why did I not think of this then?)
        use a cardboard hood (pizza box!!!) for even more shielding
    holding camera by hand was too difficult and awkward
        use a tripod to hold camera
    trace was too bright, bloomed
        explore camera settings
            "night scene"
            lower brightness

probably improve presentation by omitting much of middle of it
    when get to debugging, show first thing in detail,
    then skip to the problem in detail

Should have included in the introduction,
that my goal is for folks to get a feel for what an oscilloscope can do for
them, and a rough idea of how it is used.
One learns how to use them by playing around with them much.