Difference between revisions of "GGHC Schematics"

From i3Detroit
Jump to: navigation, search
m (Updated student schematic)
(The student unit:)
Line 4: Line 4:
 
==The student unit:==
 
==The student unit:==
 
Some key features of the schematic:
 
Some key features of the schematic:
*Uses crystal 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
 
*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
+
*7-segment display driven by shift register
 
<br />
 
<br />
 
<br />
 
<br />
Line 20: Line 18:
 
<br />
 
<br />
 
<br />
 
<br />
[[File:TeacherSchematic.png|600px|thumb|left|Teacher Schematic]]
+
[[File:StudentSchematic.png|600px|thumb|left|Student Schematic]]
  
 
==The teacher's unit:==
 
==The teacher's unit:==

Revision as of 20:28, 3 May 2011

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

Student Schematic

The student unit:

Some key features of the schematic:

  • LEDs for answers are optional: the switches can be used alone as inputs
  • 7-segment display driven by shift register













Student Schematic

The teacher's unit:

Some key features of the schematic:

  • Uses crystal 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
  • Mini-USB port with level-matching components