30 Dec
2009
30 Dec
'09
7:48 p.m.
On 30 Dec 2009 at 18:57, Tony Duell wrote:
I disagree. The PSU is on the same PCB as the monitor,
but in nrither
case does any of the logic run off the flyback transformer.
You're right. Going back to my very blurry schematic, I see how it
works now.
Thati s a separae issue. I can well beleive the
decoupling is not all
it should be :-)
Heck, the PSU will barely support 2 floppy drives. It's not a
decoupling matter at all. When the printer's running, the DC output
sags.
How is the average user going to do that?
By plugging just about anything other than the printer into the +24v
socket on the back of the unit that everyone else in the universe
uses as a power input? Nothing like swimming against the current,
is there?
Now perhaps you know how I feel when I want to get
0.125" or 0.156"
edge connectors (which nobody stocks over here). And UNC bolts are
rarer than rocking horse manure in the UK. Much rarer.
<rant>
THAT is mostly a supply problem. I can get metric, UNC, and even
Wentworth hardware here--as well as taps and dies.
Alas, that may not last however. The US manufacturing infrastructure
that creates the demand for this sort of thing is headed down the
same rathole that the UK manufacturing infrastructure went down long
ago.
On the other hand, you can probably easily find all of the above at
most hardware vendors in Shenzhen.
</rant>
--Chuck