Electronics for Bharat

Stellaris Launch pad:

• Used the LM4F120H5QR Microcontroller which is now renamed as TM4C1233H6PM. 
• Original name for this Launch Pad: EK-LM4F120XL
• Still available at TI e-Store link.
• Important thing to note is the chips in initial version of the Stellaris Launch Pads were Engineering Sample versions so the chip name became LX4F120H5QR - Not very reliable !!
• TI has released an official migration guide for Stellaris to Tiva C -This guide also contains the part number mapping for the new Tiva C Series
• Also the support software for the Stellaris ware has been now changed to Tiva Ware - Important changes include the naming convention and C99 standard types

Summary of Links:

[Desktop Entry]
Name=ApplicationName
Comment=Comment_To_Be_Displayed_when_Mouse_Hover
Exec=/path/to/executable
TryExec=/path/to/executable
Icon=/path/to/application_icon_file
StartupNotify=false
Terminal=false
Type=Application
Categories=Main_Category_of_Application; Sub_Category_of_Application

• ApplicationName - This is the name that you have earlier given to your desktop icon
• Comment_To_Be_Displayed_when_Mouse_Hover - This is a comment that would be displayed both on the Ubuntu Unity panel as well as if placed on the Desktop
• /path/to/executable - This is actual path to the install directory of the application that you wish to create the short cut for
• /path/to/application_icon_file - This is the application icon file that can be a .ico or a picture file with 48x48 max pixel dimension.
• Main_Category_of_Application - This is an optional parameter, it can be any of the standard application categories that you find in the Ubuntu Software Center - Accessories, Education, Games, Graphics, Network, Office, Development, System .etc.
• Sub_Category_of_Application - This is sub category under main category - for more info refer to this page: https://wiki.ubuntu.com/SoftwareCenter#Genre

NEMA 17 Bipolar 4-wire Stepper Motor

• Motor Properties:
• Motor Type: Bipolar Stepper (2 Coils)
• Step Angle: 1.8 degree
• Step Accuracy: 5%
• Holding Torque: 4.0 Kg cm @ 1.7A
• Rated Torque: 3.4 Kg cm @ 1 A
• Electrical Characteristics:
• Motor Coils: 2 Coils
• Rated Current: 1.7A
• Recommended Voltage: 12V (Full Stepping), 9V (Micro-stepping)
• Coil Resistance: 2 Ohm
• Physical Properties:
• Mounting Plate: NEMA 17
• Motor Length: 40mm
• Shaft Length: 24mm
• Shaft Diameter: 5mm

Mechanical Dimensions

Coils and Colors

1. Usage of Special Unicode characters:
   Looking at the beginning of the line you might have noticed the char '┌' which is U+0x250C. This is a UNICODE character to make top left border. In order to find the right string to code the PS1 variable you would need to the octal codes for the special char. To get that we have these commands:
   • If you know the code of the char:
     echo -e "\u250C" | hexdump -v -e '/1 "%03o "' | awk '{print "\\" $1 "\\" $2 "\\" $3 }'
     This is for the top left border char that we are talking here. It would print:
     

     \342\224\214
     

     This is the code you can now use in the PS1 variable definition.
   • In case you know the char it self then:
     echo ┌ | hexdump -v -e '/1 "%03o "' | awk '{print "\\" $1 "\\" $2 "\\" $3 }'
     This gives you the codes again in the same manner as the earlier one.
   
   In order to get further info you can visit the following links:
   http://www.unicode.org/charts/ - Here you get all the charts for Unicode characters
   https://wiki.archlinux.org/index.php/Color_Bash_Prompt
   
2. Special formatting for the normal user and the root user:
   The piece of the variable that does this job is -
   ($(if [[ ${EUID} == 0 ]]; then echo '\[\033[01;31m\]\h'; else echo '\[\033[01;34m\]\u@\h'; fi)
   This would ensure that if the user is root the only the host is printed else the user name @ host is printed.
   
3. Finding the Number of Files and the total size:
   This part is done in two folds -
   First part is the number of files that exist in the current working directory:
   \$(ls -1 | wc -l | sed 's: ::g') files,
   The next part is the total size of all files under the directory(no including sub-directory sizes):
   \$(ls -lah | grep -m 1 total | sed 's/total //')b
   

Φ = v / ω 
Where,
 v – AC Voltage applied to the Coil 
   [volt = Joules/Coulomb = kg.m²/(Ampere . second³)]
 ω – Angular Frequency [radians/second]
 Φ - Magnetic Flux(Instantaneous) 
   [Weber = Joule . Second / Coulomb = Joule / Ampere = 
   kg.m²/(Ampere . second²)]

1. As the Angular Frequency decreases (ω = 2.π.freq) Flux increases
2. As AC voltage applied increases then Flux increases

• RF-ID Antenna
• Inductive Charging
• NFC

• Same form factor as MSP430 Launchpad
• Free Code Composer Studio like C2000
• JTAG header for external target debugging