Print PDF
Favorite
Email
Step 4Atmega168 == brains
the atmega168 has a bunch of storage space and 28 pins, which is more than we need. by default it runs at 1MHz on an internal RC oscillator, which is not very stable. but that's ok.
PORTD:
to control the ground pins on the matrix, they are wired to PORTD of the avr. in code this will use the &= ~ (see step 6) type of method to keep all pins HI except the one for the row we want to display.
PORTB:
the latch will be on pin 0. the shift register clock is pin 3, green serial is pin2, red serial is pin4, and the no_clear is on pin1.
PORTD:
to control the ground pins on the matrix, they are wired to PORTD of the avr. in code this will use the &= ~ (see step 6) type of method to keep all pins HI except the one for the row we want to display.
PORTB:
the latch will be on pin 0. the shift register clock is pin 3, green serial is pin2, red serial is pin4, and the no_clear is on pin1.
| « Previous Step | Download PDFView All Steps | Next Step » |
 |
Add Comment
|
