Distributed Machine Learning - Opensource Deep Neural Network

It is product of Google Research, now is available as Python framework for neural network based processing.

https://github.com/tensorflow/tensorflow

The cool thing about it is that it is able to utilize GPU(s) for its processing.

TensorFlow was originally developed by researchers and engineers working on the Google Brain Team within Google's Machine Intelligence research organization for the purposes of conducting machine learning and deep neural networks research, but the system is general enough to be applicable in a wide variety of other domains as well.





Little more about tensor: https://en.wikipedia.org/wiki/Tensor

Iphone 7's DAC for Lighting connector

Likely it is gonna use DAC CS42L42 or from the family of the chip made by Cirrus Logic.

Some info can be found here: https://www.cirrus.com/en/pubs/proBulletin/MFi_TB_RevF.pdf

ATMEGA32 Kit

UPS on Linux

Install nut

The following example is for Tripp Lite UPS
Verify the Tripplite UPS:

# lsusb
Bus 002 Device 026: ID 09ae:2010 Tripp Lite 

Edit /lib/udev/rules.d/52-nut-usbups.rules and make sure the line below exists:

ATTR{idVendor}=="09ae", ATTR{idProduct}=="2010", MODE="664", GROUP="nut"

Reload the udev files:

udevadm control --reload-rules

My UPS definition in /etc/nut/ups.conf:

[tripplite_ups]
    driver = usbhid-ups
    port = auto
    vendorid= 09ae
    productid = 2010
    desc = "Tripp-Lite UPS"

(The library file is located in /lib/nut)

My /etc/nut/upsd.conf:
LISTEN 127.0.0.1        3493
LISTEN 192.168.25.168   3493
LISTEN 192.168.1.1      3493
LISTEN ::1              3493

Restart the driver:

$ sudo upsdrvctl start
Network UPS Tools - UPS driver controller 2.7.2
Network UPS Tools - Generic HID driver 0.38 (2.7.2)
USB communication driver 0.32
Using subdriver: TrippLite HID 0.81

If no error, that means everything is working fine.

My /etc/nut/upsd.users contains:

[upsmon]

    password = pass

    upsmon  master

My /etc/nut/upsmon.conf contains:

MONITOR tripplite_ups@localhost 1 upsmon pass master

SHUTDOWNCMD "/sbin/shutdown -h +0"

NOTIFYCMD /usr/local/bin/upsnotifyme

#NOTIFYFLAG ONLINE SYSLOG+WALL+EXEC

NOTIFYFLAG ONLINE SYSLOG+EXEC

NOTIFYFLAG ONBATT SYSLOG+WALL+EXEC

NOTIFYFLAG LOWBATT SYSLOG+WALL+EXEC

NOTIFYFLAG FSD    SYSLOG+WALL+EXEC

NOTIFYFLAG COMMOK SYSLOG+EXEC

NOTIFYFLAG COMMBAD SYSLOG+WALL+EXEC

NOTIFYFLAG SHUTDOWN SYSLOG+WALL+EXEC

NOTIFYFLAG REPLBATT SYSLOG+WALL+EXEC

NOTIFYFLAG NOCOMM SYSLOG+EXEC

NOTIFYFLAG NOPARENT SYSLOG

Restart the nut-server and client:

sudo service nut-server restart

OptiPlex-9020:/lib/udev/rules.d$ sudo service nut-client restart

                          

                                                                     

If it works, your PC can now communicate with UPS.

SBC IoT

Single Board Computer for Internet of Things now are getting more popular since Raspberry Pi.  Now we can see even 64-bit SBC with less than $40 price tag!

Following is the list of SBCs I can think of:

Maker	Model	CPU	Price	Website	Misc.
Raspberry-Pi	RPI1 Model A+	BCM2835	$25	https://www.raspberrypi.org
Raspberry-Pi	RPI1 B+		$35	https://www.raspberrypi.org
Raspberry-Pi	RPI2 Model B	BCM2836	$35	https://www.raspberrypi.org
Raspberry-Pi	RPI 3 Model B		$35	https://www.raspberrypi.org
Raspberry-Pi	Zero		$5	https://www.raspberrypi.org
CHIP		AllWinner R8 (ARM)	$9	http://www.allwinnertech.com
Pine64		Cortex-A53 AllWinner A64	$15 - $29	http://www.pine64.com
FriendlyARM	NanoPi 2 (I/O ports compatible with RPi)	Quadcore A9	$24.99	http://www.friendlyarm.com
Texas Instruments	ARM TIVA LaunchPAD	ARM Cortex M4F	$12.99	Datasheet
STM Microelectronics	NUCLEO-F103RB	ARM Cortex M3	$10.33	Product Info	Dev. Board is compatible with Arduino

I personally like the FriendlyARM as it is more open system than Raspberry Pi. Broadcom is known for being paranoid to reveal the details of their products as we can see from their datasheets. FriendlyARM is more community-friendly and provides a lot of stuff already. With the damn-cheap price and the board is ready out of the box (unlike Rpi which still needs flash card), this kit is very exciting, even more interesting than Arduino.

Arduino 828p Pro Mini

I bought this small board Arduino Mini (the right board, not the left board which is just a power regulator) from eBay from China for less than $2 plus S/H.  The bareboard has SMD version of Atmel AVR 828p, a RESET switch (left), and bunch of I/O ports.  The board seems a clone of what Sparkfun has (see https://www.sparkfun.com/products/11113)

Specifications:

• 20 Digital input / output ports:TX, RX, D2..D13, A0 .. A5
• 8 analog inputs ports:A0 ~ A7
• 1 pairs of TTL level serial transceiver ports RX / TX
• 6 PWM ports: D3, D5, D6, D9, D10, D11
• Main Chip: Atmel Atmega328P-AU
• Support Serial Download
• Support external power supply 3.8-12V DC
• Support 12V or less than 12V battery power supply
• 16MHz clock frequency
• Size: 33.8mm x 18mm
• Supports auto-reset
• Max 150mA output
• Over current protected
• Weighs less than 2 grams

When supplying unregulated power to the board, we should connect to the “RAW” pin and not VCC.
I/O pins are labeled "D0", "D1", ... "D13" for digital I/Os, and "A0" to "A7" for analog inputs.  There are two TRO and RXI pins.

Label on Board	Function(s)
A0	ADC0
A1	ADC1
A2	ADC2
A3	ADC3
A4	ADC4/SDA
A5	ADC5/SCL
A6	ADC6
A7	ADC7
RXI	D0/RXD
TXO	D1/TXD
D2	D2/INT0
D3	D3/INT1
D4	D4/T0
D5	D5
D6	D6/OC0B
D7	D7/IN1
D8	D8/ICP1
D9	D9/PCINT1
D10	D10/PCINT2
D11	D11/PCINT3
D12	D12/MISO
D13	D13/SCK/LED