Go Down

Topic: Parallel In Serial Out Diasy Chaining (Read 692 times) previous topic - next topic

So for my engineering design project, I have to read in 12 buttons using just 4 arduino pins. I know it's possible to do it using 2 Parallel In Serial Out Registers, but I have no idea how to daisy chain them together. Can someone help me? Also, how would the code work?

MarkT

In brief:

Serial out from one chip into serial in of the other, parallel the other control signals, parallel-load then clock for twice as many pulses...
[ I won't respond to messages, use the forum please ]

Grumpy_Mike

Or use a MCP23S17 or a better yet with only 2 pins a PCF8575.

Go Up
 


Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

Arduino
via Egeo 16
Torino, 10131
Italy