GGHC Schematics
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Surferdudemi (Talk | contribs) (Added link for schematic for teacher's unit) |
Surferdudemi (Talk | contribs) (Added notes on 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: | ||
| − | The student unit: | + | ==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) | ||
[[File:StudentSchematic.png|600px|thumb|left|alt text]] | [[File:StudentSchematic.png|600px|thumb|left|alt text]] | ||
| − | The teacher's unit: | + | ==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 | ||
[[File:TeacherSchematic.png|600px|thumb|left|alt text]] | [[File:TeacherSchematic.png|600px|thumb|left|alt text]] | ||
Revision as of 22:09, 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
