On Friday 29 August 2008 11:15:03 pm Robert Butts wrote:
I'm using ten of these and parallel. I WAS going to just use a 1 amp 5 vdc
power supply with a 2.8 V zener diode to adjust the voltage to 2.2 V. I
take it this is too simple.
This hideously outdated page gives a good introduction to
Is there an easy way to get a layout print similar to PCB's fab.ps but
showing the part number/value (what PCB calls the value, and doesn't
seem to use except in the BOM outputs)? I'm thinking that something
made from the .xy file, printing those values rotated and placed would
be close enough.
On Sat, 30 Aug 2008 09:38:37 -0500, Martin Maney wrote:
Is there an easy way to get a layout print similar to PCB's fab.ps but
showing the part number/value (what PCB calls the value, and doesn't
seem to use except in the BOM outputs)?
To display the values rather than refdes at each
On Fri, 29 Aug 2008 23:15:03 -0400, Robert Butts wrote:
I'm using ten of these and parallel. I WAS going to just use a 1 amp 5
vdc power supply with a 2.8 V zener diode to adjust the voltage to 2.2
V. I take it this is too simple.
It is. You need to protect the diodes from over current
Would a string of these work for each laser? The Battery would be 5 vdc.
Battery(+) o--++
| |
_|_ __|__
Guys -
On Sat, Aug 30, 2008 at 07:38:06AM -0400, Bob Paddock wrote:
On Friday 29 August 2008 11:15:03 pm Robert Butts wrote:
I'm using ten [laser diodes in] parallel. I WAS going to
just use a 1 amp 5 vdc power supply with a 2.8 V zener diode
to adjust the voltage to 2.2 V.
Does not
On Sat, Aug 30, 2008 at 03:14:01PM +, Kai-Martin Knaak wrote:
To display the values rather than refdes at each component, choose from
the menu (I assume, you use the GTK-GUI):
View - Displayed_Element_Name - Value
This setting affects the Postscript output too. If I want to
On Thu, Aug 28, 2008 at 11:44:49PM -0400, DJ Delorie wrote:
Try this patch to panel.pl:
- next if /\b(Via|Pin|Pad|ElementLine|Line|Arc|ElementArc)/;
+ next if /\b(Via|Pin|Pad|ElementLine|Line|Arc|ElementArc|Text)/;
The first board is used as a template for the panel, which is
I would not say never want to parallel LEDs.
The example is what if you do not have enough voltage to go series?
What if you need to operate if one LED blows? In Series if one goes they
all go.
Most large arrays have LEDs in series and in parallel.
Like a 5x5 matrix for example (5 in
On Tue, Aug 26, 2008 at 11:21:47PM -0700, Dave N6NZ wrote:
Is there some trick I don't know for insetting a smaller rectangle
inside a larger one that gives me automatic clearance?
Sure, draw an enclosed box with traces (not connected to anything). The
hole will be removed. The trace (which
On Saturday 30 August 2008 03:29:06 pm Kipton Moravec wrote:
I would not say never want to parallel LEDs.
I would. Never parallel them without a resistor in series at least.
What if you need to operate if one LED blows? In Series if one goes they
all go.
Most large arrays have LEDs in
On Sat, 30 Aug 2008 14:22:50 -0700, Ben Jackson wrote:
On Tue, Aug 26, 2008 at 11:21:47PM -0700, Dave N6NZ wrote:
Is there some trick I don't know for insetting a smaller rectangle
inside a larger one that gives me automatic clearance?
Sure, draw an enclosed box with traces (not connected
I've done a 9x11 array of LEDs. Still, EACH LED MUST BE CURRENT
LIMITED. In my case, I had 11 strings of 9 LEDs in series, each with
a current limiter (i.e. 11 limiters). If one LED blows, 9 stop
working, but there's no way a bad LED can change the current in *any*
LED.
So, the rule is: one
Mike Jarabek wrote:
Robert Butts wrote:
Woe...
I'm using ten of these and parallel. I WAS going to just use a 1 amp
5 vdc power supply with a 2.8 V zener diode to adjust the voltage to
2.2 V. I take it this is too simple.
I didn't mean to scare you. You can probably get away with
On Sun, 2008-08-31 at 00:27 +, Kai-Martin Knaak wrote:
pcb will tolerate a linewidth set to to zero. A few months back I did
zero width pads with large clearance to expose some copper text. The fab
did not complain and the mask contained holes as expected.
Copper text (with mask) is
On Sun, Aug 31, 2008 at 02:47:46AM +0100, Peter Clifton wrote:
Copper text (with mask) is cool - something it would be nice for PCB to
support.
I added support for text (on copper layers) clearing polygons quite a
while ago. Same flag/key as lines.
--
Ben Jackson AD7GD
[EMAIL PROTECTED]
Copper text (with mask) is cool - something it would be nice for PCB to
support.
I added support for text (on copper layers) clearing polygons quite a
while ago. Same flag/key as lines.
They're asking for text on an anti-mask layer.
BTW text on copper layers should default to clearing
Peter Clifton wrote:
On Sun, 2008-08-31 at 00:27 +, Kai-Martin Knaak wrote:
pcb will tolerate a linewidth set to to zero. A few months back I did
zero width pads with large clearance to expose some copper text. The fab
did not complain and the mask contained holes as expected.
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