Hey there,
I try to control 4 7 segment displays with two of these registers http://www.alldatasheet.com/datasheet-pdf/pdf/51041/FAIRCHILD/DM74LS164N.html
I connected the reset pins, the clock pins, and on both of them I connected serial in 1 and 2 .
the serial in inputs of the second one are connected with the last output (OH) of the first register.
Now I cannot figure out how to send serial data to it from the arduino.
Which is the clock pin, which is the serial out pin, how can I access them?
(http://yqezpq.blu.livefilestore.com/y1pAnUbSEMiGl5L9ZzOleeDb8SA7Qg7PLgyTASzuOewOBsaTQYKb3aahLTCdWYhfqBb0doAw8ONobWogi7CjHyw2g/PIN%20MAPPING%20ARDUINO%20MEGA.jpg)
I really dont know how i can get this work :~
- Flo
Which is the clock pin, which is the serial out pin, how can I access them?
Any pin you want them to be, it is down to your software.
See :- http://www.arduino.cc/en/Tutorial/ShiftOut (http://www.arduino.cc/en/Tutorial/ShiftOut)
Note that for four 7 Segment displays you will need four shift registers not two.
i got it to work now.
it was just a the and gate input of the registers.
I need two 8 bit registers, or four 4bit ...
it works now
it was just a the and gate input of the registers.
Not sure that make any sense.
I need two 8 bit registers, or four 4bit
? a seven segment display has seven segment hence you need seven outputs. Unless of course you don't actually have a seven segment display but a decoder chip driving the seven segment display, which is something different from what you said.
yeah sorry, i meant that there is an AND gate at the inputs of my serial in parallel out shift registers.
and yeah i meant driving the drivers...
i was just so happy that it finally worked ...
- Flo