I got 23 meter of leds strip with 3 power supply which have a share ground to an Arduino. The Arduino can run perfectly the leds, I have shielded the cable from the arduino to the connector and I have no issues at this point.
When I connect my DSLR via HDMI (shielded cable ) and AC adaptor ( china made ), some leds start to flicker, and if I put the power cord closer, they flicker more.
I wonder if I just need to buy a better AC adaptor ( takes time ) or by sharing the DC ground of the camera, the flicker will go away ( I am afraid of damaging the camera and leds by doing that ).
One other solution that came up on my mind is to get a shielded sleeve to protect my leds from the power cord.
Any better idea?