Basically I am concerned about long 12v @ 3A & 5V @ 5A  cable runs of about
5m+ with random taps along the run of various lengths.

My concern is the inrush currents, spikes and general nasties created
particularly at initial power on and when the loads are switched in an out
during game play.

>From peoples experience should I be implementing some sort of power
conditioning and if so what.

I was considering placing inductors at the source in line with the 12v and
5v to limit the sudden demand on the PSU when powering on.  Perhaps a
sprinkling of small inductor at the input to each load.

But I have no idea if this is required or what size the inductors should
be.  I am thinking that ATX power supplies need to deal with massive power
on surges or are motherboards designed not to do this.

Any thoughts.  The details are below.

Cheers Justin

I have asked to do all the tech for an escape room.

All the puzzles have been bench tested and now close to installing in the
rooms.

The PSU is a ATX power supply with a cheap Ebay ATX power breakout which
seems to work well.

The loads are several Magnetic Locks, Arduino UNO's (no inbuilt reg)
controlling 4 RFID readers, 14  Wemos ESP8266's (in built 5v ->3.3V reg)
and 4 media players (no inbuilt reg)

All the mags locks (12v @ approx 300mA) have been fitted with snubber
diodes (is that the right term) close as possible to the locks.

Some of the puzzles require the Mag Locks to be normally energised so they
power up at power on.

Due to the nature of the room it is difficult to reticulate 240A/C where
needed so decided to reticulate 5V and 12V DC.
--=20
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