I’m not using a PC anywhere. Just a PLC (programmable logic controller). Yes, that’s
sort of a computer, but it’s a far more reliable piece of equipment than
a PC. I’m using it mostly for passive monitoring through transducers, and
for controlling an external video camera. The only independent action it will
take is release oxygen into the cabin, but there will be a mechanical override
available. I was going to go 100% mechanical on that before, but grew convinced
of trying the plc route instead because I like the inherent flexibility. Being
my first sub, I am not 100% sure what thresholds will have to be set at, and it’s
really easy to modify them when you go electronic.
Alec
-----Original Message-----
From: Dan H.
[mailto:JMachine@adelphia.net]
Sent: Thursday, May 01, 2003 8:46
AM
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] Computers
Onboard
All the talk of laptops and PC's on
board a P-sub has got me wondering.
I'm building a K-350. Am I
building it the "old way," with wires and switches?
To be sure, there is a lot to be
said for simplicity in the sub world. Safety is the number one concern
followed closely by power conservation. I imagine a computer would have
it's benefits in many ways. One would be managing the power available and
the loads, not to mention coupling monitoring systems and control
systems. But, in a low budget sub, a P-sub, say $15,000, is it
really necessary or are we complicating things with a risk to safety if
their is a glitch in the system.
Just for my curiosity; how many
P-subs owners, the ones that actually have a sub and have gotten it wet, have
PC's installed in them? A show of hands, please.
Maybe I'm cautious. Maybe I'm
old!
Thanks, Dan H.