Hi, you don't need resistors between the 595 outputs and the 2803 inputs, if that's what you're asking. There are 2K7 built-in to the 2803 inputs.
I think the pin labelled CD+ (normally labelled COM) on the 2803 should go to 5V rather than ground.
A simpler design than this would be to use tpic6c595. This is a medium current shift register similar to the 74hc595 but with fet transistors on the outputs, so the 2803 would not be needed.
If only someone had already designed a board combining an Arduino and a bunch of tpic chips and would be willing to sell you one....
Connecting pin 10 to ground will turn on all the LEDs, similar to a lamp test.
Pin 10 is connected to + on the o/p power supply for relay coil snubbing.
thanks for replies and hope everyone is having good holiday(s).
where i have my account to purchase supplies, it's either a crap-load of 3904's (200+) or 2803's (25)
i like the idea of the 2803's simply for easier wiring and smaller board IF the design will work the same way.
if understanding correctly,
i can omit the wiring to pin10 completely
i DO NOT need the resistor between 595 being the 2803 have the 2.7k already