Gr'2

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FYS 3260/4260Electronics Components, Packaging
and Production

• PROJECT
• Digital Step-Km Counter
• GROUP 2
• Abdurrahim Günaydin
• Ellaheh Barzegar
• Mustafa Karais
• Date of Final Editing May30,2007

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Digital Step-Km Counter

• Ideas from www.redcircuits.com
• The circuit counts your steps and shows the
  distance you walked
• 128 steps 100m

Design we found on the website
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Digital Step-Km Counter
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Digital Step-Km Counter
The final layout
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Digital Step-Km Counter

• Challenges during design process
• Set up CadStar correctly
• Schematics
• Learning how to use CadStar
• Selecting right components and placing them
• Layout
• Using the right settings
• Finding the most optimal placement of the
  components

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Digital Step-Km Counter
_at_ the LAB

• Challenges during placing and soldering the
  components
• Finding the right components
• placing the components correctly

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Digital Step-Km Counter
_at_ the LAB

• Mistakes
• Before placing the hole mounted parts
• We had components that jumped around
• Components that were placed upside down
• After placing the hole mounted parts
• Using wrong components

• Solutions
• We reentered the board into the oven and removed
  the wrong placed components and re-soldered
  manually
• Hole mounted components were already on the
  board. We had to cut the wrong part off, then
  manually solder the right one.

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Digital Step-Km Counter
_at_ the LAB

• Testing the circuit
• IT DID NOT WORK!!
• Errors
• We had forgot to connect the reset to GND, so we
  had a floating wire while the reset buttons
  werent pushed down.
• We used common anode displays as if they were
  common cathode. The diodes must have higher
  voltage on the anode side in order to lighten up.
  Since the anodes were connected to GND they
  wouldnt lighten.

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Digital Step-Km Counter

• HOW TO MAKE IT WORK?
• Solutions
• We soldered a resistor between the output of the
  buttons and GND.
• We cut off the connection from the anodes to GND
  and reconnected them to VDD.

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Digital Step-Km Counter

• _at_ the LAB

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Digital Step-Km Counter

• _at_ the LAB
• The result
• Since the diodes in the displays lightens when
  the input is low displays showed the numbers
  inverted

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Digital Step-Km Counter

• Usage
• Runners
• People who should burn certain amount of energy
  each day (for medical reasons or diet)

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Digital Step-Km Counter

• Comments or questions?
• Thank you for your patience