Difference between revisions of "GGHC Schematics"

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Here are the latest versions of the schematics for the devices we plan to make as part of the GGHC:
 
Here are the latest versions of the schematics for the devices we plan to make as part of the GGHC:
  
[[File:StudentSchematic.png|600px|thumb|left|alt text]]
+
[[File:StudentSchematic.png|600px|thumb|left|alt Student Schematic]]
 
==The student unit:==
 
==The student unit:==
 
Some key features of the schematic:
 
Some key features of the schematic:
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*(schematic needs to be revised with improvements / corrections from teacher unit design)
 
*(schematic needs to be revised with improvements / corrections from teacher unit design)
  
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+
 
[[File:TeacherSchematic.png|600px|thumb|left|alt text]]
+
 
 +
 
 +
 
 +
[[File:TeacherSchematic.png|600px|thumb|left|alt Teacher Schematic]]
 
==The teacher's unit:==
 
==The teacher's unit:==
 
Some key features of the schematic:
 
Some key features of the schematic:

Revision as of 19:15, 14 April 2011

Here are the latest versions of the schematics for the devices we plan to make as part of the GGHC:

alt Student Schematic

The student unit:

Some key features of the schematic:

  • Uses internal RC oscillator for microcontroller
  • 7-segment display anodes are driven by timer compare outputs for multiplexing without software
  • (schematic needs to be revised with improvements / corrections from teacher unit design)



alt Teacher Schematic

The teacher's unit:

Some key features of the schematic:

  • Uses internal RC oscillator for microcontroller
  • LEDs for answers are driven by input switches, not microcontroller (required to save output pins)
  • LEDs for answers are optional: the switches can be used alone as inputs
  • 7-segment display anodes are driven by timer compare outputs for multiplexing without software