more than 12 channels

[davidjustin]

I think I found a solution to the power up problem.

All you need to do is add a 10k pull up resistor from pin_sr_noe (pin 11 on the Pi) to the 5v line.
Actually on the shift register diagram it would be between the purple input wire from the Pi to the 5V rail.

I tried it here and it is working using a SainSmart relay board.

I still need to do some further testing. It may be possible to enable a pull up on the Pi through software. I'll post back after I test. Short on time riight now

Dan

Thank you for working on this! 

I was struggling to get my Active Low boards working. After adding the 10k pull-up resistor it works as you described!

I was looking at this earlier today and noticed the DIY relay diagram was updated to include the wiring for the transistor, but now it seems to have reverted back to the earlier version. It is working for me with the transistor wired up, but is it necessary?

Also, I don't see an "Active-Low relays" option in the station handling, did that get left out?

David