GGHC Schematics
(Difference between revisions)
Surferdudemi (Talk | contribs) (Updated key features to match new schematic.) |
Surferdudemi (Talk | contribs) m (Updated student schematic) |
||
| Line 8: | Line 8: | ||
*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 anodes are driven by timer compare outputs for multiplexing without software | ||
| − | |||
<br /> | <br /> | ||
<br /> | <br /> | ||
Revision as of 21:36, 22 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 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
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
