Read multiple digital input from one digital output.

[mbratch]

It seems if your gpios 3, 21, and 19 are configured with pull-down resistors, then it should work fine. As was suggested before, you don't need gpio 23 to feed 3.3v. Just use the 3.3v voltage source.

[Gandalf]

It seems if your gpios 3, 21, and 19 are configured with pull-down resistors, then it should work fine. As was suggested before, you don't need gpio 23 to feed 3.3v. Just use the 3.3v voltage source.

Thanks.