Raspberry PID

Building a Real-Time Metro Arrival Board with Raspberry Pi and LEDs.

More explanation can be found at this blog post: http://johnbhall.com/raspberry-pid

Transcript

1. Raspberry PID
   !
   John B. Hall
   !
   @johnbhall
   

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8. Supplies and Cost
   Raspberry Pi $45
   4 7-Segment Displays $44
   MicroSD Card $13
   WiFi Adapter $12
   Power Cord $12
   Picture Frame $12
   Breadboard $6
   Foam Board $3
   Total $147
   Soldering Station $38
   Wires $14
   Solder $9
   Diagonal Cutters $7
   Pliers $3
   Total $71
   

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9. segment0 = SevenSegment(address=0x70)
   segment1 = SevenSegment(address=0x71)
   segment2 = SevenSegment(address=0x72)
   segment3 = SevenSegment(address=0x73)
   update_segment(segment0, customink_str[0:4])
   update_segment(segment1, customink_str[4:8])
   update_segment(segment2, downtown_str[0:4])
   update_segment(segment3, downtown_str[4:8])
   [3, 12] —> [“_3”, “12”] —> “_3_12” —> “_3_12_ _ _”
   

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10. Thanks!
    !
    johnbhall.com/raspberry-pid
    !
    @johnbhall
    

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