Hi
The basic answer is:
1) Power them off of something stable around 18 to 19 volts. Anything higher
just heats them up without doing anything useful.
2) Put a heat sink on them. You want to get the base plate to below 50C.
Without a heat sink they get warm enough to significantly shorten their
Eric,
the power supply quality is not critical. The LPRO (like most other
Rb's) has an internal switching power supply, so the wide tolerance
in the primary power source voltage.
I found other Rb's to be quite sensitive to vibrations, but when they
are in a box, with a decent PS (I use an
There are lots of ways you can unintentionally affect a device
like an LPRO. For instance, suppose the internal power supply
dissipates a different amount of heat depending on the input
supply voltage. This could cause the oven to momentarily shift
its internal temperature a small amount...
On 07/10/11 19:01, Chuck Harris wrote:
There are lots of ways you can unintentionally affect a device
like an LPRO. For instance, suppose the internal power supply
dissipates a different amount of heat depending on the input
supply voltage. This could cause the oven to momentarily shift
its
No, I haven't done this, but I realized this after fiddling around with
supplies and verified the ideas with a friend of mine designing supplies
all the time. He also pointed out that many switch supplies tend to run
better when the supply voltage is on the low side of things.
Better?
Lower
fortunately, everything in the lab(basement) is on UPSs so in theory
the input voltages to the equipment should be pretty constant and I
was already planning on using a linear supply.
as far as magnetic disturbances go, what is a reasonable precaution
short of making a muMetal box?
On Fri, Oct
fortunately, everything in the lab(basement) is on UPSs so in theory
the input voltages to the equipment should be pretty constant and I
was already planning on using a linear supply.
Be careful, there. Most consumer type UPSs are not line regulators. When
there is sufficiently high line
On 07/10/11 20:30, John Lofgren wrote:
fortunately, everything in the lab(basement) is on UPSs so in theory
the input voltages to the equipment should be pretty constant and I
was already planning on using a linear supply.
Be careful, there. Most consumer type UPSs are not line regulators.
Magnus Danielson wrote:
We're time-nuts. We are trying to get more from these devices
than the manufacturer ever intended.
So you let in normal mains into you lab? :-)
Me personally? I don't worry much about little stuff like that,
so I am more of a time-nut heretic. I did wire my house
On 10/7/11 11:16 AM, Eric Garner wrote:
fortunately, everything in the lab(basement) is on UPSs so in theory
the input voltages to the equipment should be pretty constant and I
was already planning on using a linear supply.
What kind of UPS? A static inverter? Most UPSes just feed the line
I run my pcs on a double conversion true sine wave UPS. It is designed to run
continuously. It converts to DC, which is easy to filter, then creates a
voltage and frequency regulated sine wave.
Modified sine is just a square wave. Complete junk.
They are APC double conversion(online) UPSs. I ended up buying them
because my washing machine makes the lights in the basement flicker
when it runs so I didn't want that feeding through into my equipment.
I've looked into the ferroresonant regulators like the Sola MCR series
but they are pretty
I'm using Opti-UPS, but the same idea. They have software such that you can
monitor the power being delivered, frequency, voltage, etc.
The only real drawback to double conversion is the fan noise. The Opti-UPS is
slightly quieter than the APC, but not by much. The fan noise is quite
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