Relays/Shift Registers/Arduino Interference from TL ballast

Other Hardware General Electronics
7

TomGeorge:
Have you placed bypass capacitors at each of the 74HC595 ICs.

Only one, over the voltage 5V line thats both feeding the arduino and the shift registers.

TomGeorge:
How far are the 74HC595 from the Arduino?

I'd say +-10 cm. Cables are around 20cm long in total because I looped them through ferrite ring.