This is my adaptation of the Olsen 595 that I use for direct control of 24V strings of LEDs.
I am sure it has been mentioned before that in Australia most if not all currently available lights are powered from a low voltage adapter, most of which are 24 volt.
I supply the 595 board from a single 24 volt D.C. supply that has sufficient capacity for all the strings attached. Using a single D.C. supply eliminates the need for having multiple power adapters plugged in. Because the whole board uses low voltage D.C. it is possible to control each string of LEDs with a FET driven directly from the output of the 595 ICs which eliminates the need & expense of SSRs.
I have made this version of the 595 board with 56 N-Channel FETs that switch low when on and 8 P-Channel FETs that switch high when on. My idea is to use the P-Channel FETs to enable banks of LEDs that are connected to the N-Channel FETs. For example I could have 8 arches connected in parallel that each consist of 56 channels and have the common anode from each arch connected to one of the P-Channels. It would then be possible to enable any or all of the arches to display the pattern being output on the 56 N-Channels. Effectively this will give me 448 channels (8 x 56).