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Return to BlogPortable Gaming Project Made from AVR
Posted Feb 09, 2012 at 11:43 am
Figure 1
The project uses an 8×8 LED matrix and an ATmega32 to create a handheld gaming device which runs a breakout style program and potential-filled self contained platform.
The LED matrix is an AVR-based toy along while the PCB has been made using mostly surface mount components. In using the AVR Atmega, most of the free wires have been replaced with a ribbon cable in order to make the handling a lot easier. For the programs to be written, which will provide control by user input, the buttons have been wired up. This can produce a movement of dot around while being able to change its color.
Instead of using shift registers, transistors were employed to directly drive the ROW inputs. There is no need for a shift register since there is enough I/O pins and a decent amount of current will be allowed by the transistor. The resistors are used to limit the current coming out of the COLUMNS. Now that there will be more current flowing through, the resistors are essential. If shift registers are used on COLUMNS, it should be accompanied with a latch, so shifted data won’t be seen.
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