GGHC Schematics
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*7-segment display anodes are driven by timer compare outputs for multiplexing without software | *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) | *(schematic needs to be revised with improvements / corrections from teacher unit design) | ||
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[[File:TeacherSchematic.png|600px|thumb|left|Teacher Schematic]] | [[File:TeacherSchematic.png|600px|thumb|left|Teacher Schematic]] | ||
==The teacher's unit:== | ==The teacher's unit:== | ||
Revision as of 22:17, 14 April 2011
Here are the latest versions of the schematics for the devices we plan to make as part of the GGHC:
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)
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
