Difference between revisions of "GGHC Schematics"

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(Updated key features to match new schematic.)
 
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==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
*Mini-USB port with level-matching components
+
*Connections to radio module are indicated by RPx pads (due to lack of correct Eagle library for MRF24J40MA)
 
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==The teacher's unit:==
 
==The teacher's unit:==
 
Some key features of the schematic:
 
Some key features of the schematic:
*Uses crystal oscillator for microcontroller
+
*7-segment displays are driven by shift registers
*LEDs for answers are driven by input switches, not microcontroller (required to save output pins)
+
*Connections to radio module are indicated by RPx pads (due to lack of correct Eagle library for MRF24J40MA)
*LEDs for answers are optional: the switches can be used alone as inputs
+
[[Category:Projects]][[Category:Group Projects]]
*7-segment display anodes are driven by timer compare outputs for multiplexing without software
+
*Mini-USB port with level-matching components
+

Latest revision as of 11:15, 24 June 2012

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
  • Connections to radio module are indicated by RPx pads (due to lack of correct Eagle library for MRF24J40MA)













Teacher Schematic

The teacher's unit:

Some key features of the schematic:

  • 7-segment displays are driven by shift registers
  • Connections to radio module are indicated by RPx pads (due to lack of correct Eagle library for MRF24J40MA)