.

Click here to edit 

tech boy toys make a 3d printer at home

 

 

Rank 1 Opus fixed w audacity

ion drive

custom front panels

http://www.frontpanelexpress.com/?fbclid=IwAR1ArAKfWD7N96r4im_cgpz0CKhPB1xJ-ID98s14jP5cTvXKjvK6K0j-pjg

                                       Find an ebook, kats is a public tracker on the source link be warned

https://cse.google.com/cse?cx=011394183039475424659%3A5bfyqg89ers&fbclid=IwAR0tsvwqRNn9ByYPqYEx416nu3UTVKRIf6eJ4VLQsT0mmUT3pEUxx_K_Fyw

sites searched

 http://gen.lib.rus.ec/*
http://en.bookfi.org/*
http://bookzz.org/*
http://forum.mobilism.org/*
http://tuebl.ca/books/*
http://avxhome.se/ebooks/*
www.4shared.com/*
http://mediafire.com/*
http://ipmart-forum.com/*
http://ebook3000.com/*
http://freebookspot.es/*
http://demonoid.ph/*
http://ebookee.org/*
http://kat.cr/*
http://www.downeu.org/ebook/*
https://onebigtorrent.org/torrents/*
http://manybooks.net/titles/*
http://freshwrap.ws/*
http://www.plentyofebooks.net/*
http://book.pdfchm.net/*
http://www.freebookspot.es/*
http://www.feedurbrain.com/forum/*
http://ebookbrowsee.net/*
http://2020ok.com/books/*
http://librs.net/*
http://thepiratebay.la/torrent/*
http://bitsnoop.com/*
http://www.giuciao.com/books/*
http://books.tr200.org/*
http://booksc.org/*
http://club.topsage.com/*
http://ebookjunkie.com/*
http://nips.djvuzone.org/*
http://pdf-giant.com/*
http://manybooks.net/*
https://www.scribd.com/*
http://freecomputerbooks.com/*
http://www.freetechbooks.com/*
http://www.onlinefreeebooks.net/*
http://www.onlineprogrammingbooks.com/*
http://www.ebooklobby.com/*
http://bookboon.com/*
https://www.reddit.com/r/eebooks/*
https://www.reddit.com/r/mathbooks/*
https://www.reddit.com/r/csbooks/*
https://www.reddit.com/r/physicsbooks/*
https://www.reddit.com/r/econbooks/

 

posted on reddit by (guide for finding textbooks)  u/Amosqu

I found some nice tutorials and some good trance music

 

 

 

 

 

 

 


Hearing Aid Circuit

This low-cost, general-purpose electronic hearing aids works off 3V DC (2×1.5V battery). Transistor T1 and associated components form the audio signal preamplifier for the acoustic signals picked up by the condenser microphone and converted into corresponding electrical signals.

The medium-power amplifier section is wired around popular audio amplifier IC TDA2822M (not TDA2822). This IC, specially designed for portable low-power applications, is readily available in 8-pin mini DIP package. Here the IC is wired in bridge configuration to drive the 32-ohm general-purpose monophonic earphone.

The audio output of this hearing aid circuit is 10 to 15 mW and the quiescent current drain is below 1 mA. The circuit can be easily assembled on a veroboard. For easy assembling and maintenance, use an 8-pin DIP IC socket for TDA2822M.

 

source: http://www.electroschematics.com/1676/digital-hearing-aids-circuit/

Simple Cable TV Amplifier Circuit

 

This cable tv amplifier circuit is a rf amplifier designed to be quickly installed between two coaxial cables. Both input and output impedances are compatible with 75 Ω cables. The main amplifier si T1 transistor, T2 is working as an emitter follower. The feedback bias is determined by R3 and R4.
The total gain of this tv cable amplifier is 22dB.

Because of the high frequency limit of transistors (<= 2GHz) the tv amplifier works well up to 150 MHz. It must be housed in a metal case and the coaxial cables must de 75 Ω type. The total current consumption of this tv cable amplifier circuit is around 20mA.

 

Tv amplifier active components

T1, T2 = 2SC4308 or 2SC1324

source:  http://www.electroschematics.com/401/simple-cable-tv-amplifier/

 

DIY HiFi Orthodynamic Portable Headphones (aka Ribbon Driver Headphones)

Are you sick of cheapo portable headphones? 
Are you sick of paying $200+ for a decent set of portable cans? 
Do you like Unique Technology? 
Are you DIY?

These headphones use drivers that are Orthodynamic. To sum it up, they are very similar to electrostatic and ribbon drivers in that they are planar. However, one major difference between electrostatic and orthdynamic is that Orthodynamiccan be driven from simple headphone sockets whereas ‘Stats  need several hundred volts for bias. This makes them the best possible candidates for HiFi drivers in most headphones with some costing more than $550 a set. Unlike most headphone or normal drivers/woofers, this type actually has the voice coil printed onto the thin mylar diaphragm instead of attached to the back. This mylar piece is actually then suspended between two strong magnets with holes in them. When a signal is applied, the diaphragm will be charged to go back and forth with the sine wave. Since the diaphragm is flat, there is not peakiness and almost no delay due to “return”. Please see th diagram below for a better understanding.

 

What you will need:
- 1 Set of FAKE Audio Technica ESW9/ES7 or other 40mm driver portable headphones. (ebay, dealextreme, etc. will have many of these).
- Small Rubber Case feet ~$2 (can also use foam tape circles your gf or mom might have for scrap-booking)
- Extra Rubberized foam ~ $0.50 (you can ind similar at craft stores, just had some extra of this lying around)
- 1 Sheet of Dense Wool Felt ~$0.75 at the local craft store in the kid’s section
- 1 Sheet of looser, Soft Wool felt ~$1.25 usually found in the fabric section with the other felts on the spool
- 2 Kleenex Tissues ~ Free
- Some scotch tape for the driver fronts
- Borrowed Dremel for drilling holes in the cups
- Krylon Fusion Plastic paint in your favorite color (Rustoleam works just fine too) or whatever way you want to paint these.
- 50ft. of 28AWG black teflon coated silver plated copper stranded cable (SPC, can find on ebay as military surplus). I did my cable in an 8 conductor configuration with 2 strands for each channel going to a driver in a tight litz braid. The wire I used is 11 strand, cryo treated, 1000V Teflon, 99.99% pure silver covering 99.999% pure copper. Literally some of the best wire on earth and when done in this way, minimal skinning, thin, and very durable. Bought it as military surplus meant for fighter jets made by Alpha Wire (no on their site).
STEPS:
Unscrew the Headphones and Remove the stock Drivers. Replace them with the SFI (the front of the driver has smoother cloth).  Remove the cups and drill the holes, then sand and paint.
Once dry, place a layer of the damping foam around the edges of the cups and sides of the back of the driver baffle as seen above. This will keep the plastic in check.  Heat up some shapelock with a torch or coffee warmer, then surround the driver edges so that the driver is molded into the plate. Then place a rubber foot over the center hole of the Othrodynamic driver, this is to tame the driver and prevent bulging when in use.
Place a disc of the Dense wool against the back of the cup (black matched best for me).
Now, place the disc of the Softer Wool Felt into the back of the cup.
Here, you fold the Kleenex so that there are 4 layers of “tissue”.
Cut out the tissue to the shape of the back of the driver and cut a center hole the size of the rubber feet.
Fit all 4 layers over the back of the driver.
Screw the assembly back together and put some tape over a couple of baffle front paper covered areas to prevent air leakage.
 
Put the Ear Pads back on and Enjoy the Fun!
They will be unique, and VERY inexpensive considering how well they compare to much more expensive headphones and can still be driven with an iPod or such, but still does do best when attached to an amplifier.
source http://www.stacydevino.com/?p=18
 
You want more DIY? Check out the links on this page: http://jap.hu/electronic/
 
 

 

I also repaired my $60 mushkin ventura pro with some code in mpall using windows:

 

I wasnt able to format or explore, when I was in linux I noticed the USB stick size was 0 and the name said Phison

If you have a Phison chip like me this should be reflected here: String Manufacturer Name=TOSHIBA
I used Phison MPALL v3.63.00.. not the 3.63.0C or the 3.63.0c-DL17

Plug into a usb3.0 port.. this is critical. YOU MUST USE USB3

Copy the contents between the ===== to a new file named 2014_2251-03.ini

===========================================
[PenDriveMP]
IC Type=PS2251-03
[Parameter Mark]
Parameter Type=F1_MP_21
[Customize Info]
USB VID=0x0930
USB PID=0x1400
String Product Name=USB DISK 3.0
String Manufacturer Name=TOSHIBA
Inquiry Version=PMAP
Use30Fixture=1
IDBlkLibrary_Version=1.2.16.0
[Configuration]
Reset Serial Number=0
[TestItemOption]
Do Preformat Test=1
[Extra]
Mode=3
[Misc]
Volume Label=USB DISK
Burner Erase All=1
Wafer Erase All=1
set1667=0x00
[Advance]
FC1=0xFF
FC2=0x01
CheckLegacy=1
[Firmware]
ISP=0

Source

 https://web.archive.org/web/*/http://whatrevitwants.blogspot.com/2011/06/repurposing-autodesk-usb-media_20.html 

https://forums.lenovo.com/t5/Lenovo-B-and-G-Series-Notebooks/Lenovo-G780-not-working-after-BIOS-update/m-p/2150324#M46721 

 I reflashed a lenovo g780 bios from a usb with this tool

Bios Boot USB Stick http://www.biosflash.com/bios-boot-usb-stick.htm

https://www.bios-mods.com/forum/Thread-Request-Lenovo-G780-Whitelist-Removal?pid=95258#pid95258 

 https://www.mediafire.com/file/p9kcpylz7ud0s94/5ECN41WW_NWL_ADV.rar

 

In Mac Sierra disable gatekeeper

sudo spctl --master-disable

Tinkertool and ONYX are a few good aps

 

Reset Bluetooth mac using Terminal

Using terminal command line clear or reset Bluetooth settings. Open terminal Application > Utilities or Search from spotlight search.
Copy below like one by one and Reset bluetooth using the terminal,

sudo kextunload -b com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport
sudo kextload -b com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport

...........................

Hadoop older mac cluster

https://www.instructables.com/id/Install-and-Configure-HADOOP-on-OsX/?fbclid=IwAR0iZKEW2A4xf4Bzfl_ersCcZuhHcvlFEtQ-FeDHhNAvjCkXHWOAFFkexkk

Installing Hadoop on OSX

I decided that I wanted to setup a Hadoop cluster on the Mac’s I run, this was mainly decided because of Xgrid not begin available anymore on the new version os OsX. I have setup SGE clusters before, Xgrid obviously, and Microsoft Cluster Server so I wanted to get it under my belt. This isn’t the definitive guide but it worked fairly well for me, I am still not sure of some of the concepts but that will come with practice.

The first step is to make sure you have the basics.

Command line Xcode tools and Java Developer for your version os OsX.

https://developer.apple.com/downloads/index.action

Lets first create a group and a user on every machine.

Create a group named ‘hadoop’ and then add an admin user ‘hadoopadmin’ to the group.

Lets do everything as hadoopadmin to make it easy.

You can download Hadoop and install it yourself but I took a shortcut and used homebrew to install it.

->brew install hadoop

This will set all your env paths in the proper hadoop config files so this is a help.

Once installed lets set the config files in hadoop.

I named my machines

hadoop01 & hadoop02 for the first two.

Configure the masters and slaves file on all machines.

master:

[email protected]

slaves:

[email protected]

[email protected]

Also configure /etc/hosts on all machines.

#

# localhost is used to configure the loopback interface

# when the system is booting. Do not change this entry.

##

127.0.0.1 localhost

255.255.255.255 broadcasthost

::1 localhost

fe80::1%lo0 localhost

#

#

#

# hadoop

132.235.132.67 hadoop01

132.235.132.46 hadoop02

I am using 2.4.0 so they are located in

/usr/local/Cellar/hadoop/2.4.0/libexec/etc/hadoop

Edit

hadoop-env.sh

I changed these two lines.

#export JAVA_HOME=“$(/usr/libexec/java_home)”

to

export JAVA_HOME=`/usr/libexec/java_home -v 1.6`

and

#export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true”

to

export HADOOP_OPTS="-Djava.security.krb5.realm= -Djava.security.krb5.kdc=“

This last one stopped an error I was getting upon startup.

Edit

hdfs-site.xml

Insert this configuration

 

 

dfs.replication

3

 

dfs.name.dir

/usr/local/Cellar/hadoop/2.4.0/hdfs/name

 

dfs.data.dir

/usr/local/Cellar/hadoop/2.4.0/hdfs/data

Edit

mapred-site.xml.template

Insert

 

 

mapred.job.tracker

hadoop01:9001

Edit

core-site.xml

 

 

fs.default.name

hdfs://hadoop01:9000

 

hadoop.tmp.dir

/usr/local/Cellar/hadoop/2.4.0/tmp

Now lets create a few hadoop directories

/usr/local/Cellar/hadroop/2.4.0

-> hadoop -mkdir tmp

-> hadoop -mkdir hdfs

-> hadoop -mkdir hdfs/name

-> hadoop -mkdir hdfs/data

I enabled passwordless SSH on all machines.

ssh-keygen -t dsa -P ” -f ~/.ssh/id_dsa

cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

I found info on this at

http://stackoverflow.com/questions/7134535/setup-passphraseless-ssh-to-localhost-on-os-x

I then formatted the name node

-> hadoop namenode -format

Then started hadoop by running

/usr/local/Cellar/hadoop/2.4.0/libexec/sbin/start-all.sh

I did all of this stuff on all my machines, although some items I think do not need to be.

I have to thank

http://stackoverflow.com &

http://dennyglee.com

For tutorials and help getting through this.

Thanks

Joe Murphy

AKA Grehyton

 

 

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