Hi, thank you for your interest.
Yes we continue our work on this project.
We have milestone planned on the end of July.
So on the next week I'll send some anounce about whats new and plans to
the future.
Just now, you can look at [1]wedana.sf.net for current project status.
Re
On Jul 28, 2011, at 7:03 PM, DJ Delorie wrote:
>
>> Or 4000-series CMOS logic. Nice thing about 4000 series in this
>> application is that it can operate on unregulated 12V.
>
> I thought of that, but a linear regulator just for the pic would be
> cheap, and you get debounce, multi-input state
> Or 4000-series CMOS logic. Nice thing about 4000 series in this
> application is that it can operate on unregulated 12V.
I thought of that, but a linear regulator just for the pic would be
cheap, and you get debounce, multi-input state machines, and a
watchdog for no extra cost...
Even if I ra
Hi,
That works too, much less drastic, and equally effective, as long as it doesn't
start switching on and off repeatedly.
Mike
--Original Message--
From: DJ Delorie
To: mjara...@sentex.ca
To: gEDA user mailing list
Subject: Re: gEDA-user: Power relay question
Sent: Jul 28, 2011 8:57 PM
Try the lesstif HID with thindraw-poly, it doesn't use the shaded
polygons like the gtk hid does.
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Or a normally-closed switch that just shuts the power off, rather than
blow a fuse?
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On Jul 28, 2011, at 4:04 PM, DJ Delorie wrote:
> This is the type of problem that just screams "PIC10 !!" :-)
Or 4000-series CMOS logic. Nice thing about 4000 series in this application is
that it can operate on unregulated 12V.
>
> The lower cost of the simpler relay would easily pay for th
Hi.
Just finished my latest, a bit larger layout (The one I bragged about
lately). After I added polygons to pour the remaining board estate with
copper, PCB slowed down significantly. Frames per second as measured
with the benchmark() action went down from very usable 16 FPS (*) to 1 FPS.
Teh t
Hi,
One additional safety note... Add a second limit switch past the first one.
Wire the second one so it blows the fuse if tripped. That way, if your
controller stops working for whatever reason, the motor will only run past the
first limit switch once, before failing safely. Think of it
Thanks Mike, I'll look into this.
On Thu, Jul 28, 2011 at 7:31 PM, Mike Bushroe <[1]mbush...@gmail.com>
wrote:
I would use a microcontroller, for instance Atmel ATtiny ( [1]8
pin
version) to replace the relays needed to keep track of 4 states,
and an
[2]L29
I would use a microcontroller, for instance Atmel ATtiny ( [1]8 pin
version) to replace the relays needed to keep track of 4 states, and an
[2]L293 dual H-bridge motor driver to drive the two motors in forward
and reverse directions. You would need 4 pins to control the two motors
in
On 07/28/2011 05:52 PM, Rob Butts wrote:
This is a dumb question but I'm having a mental block.
I have a 12 volt dc motor that I want to run from the push of
a momentary pushbutton which will run until a limit switch gets hit.
Digikey has a power latching relay PB1088-ND (cheap
On 19/07/2011, Colin D Bennett wrote:
> On Tue, 19 Jul 2011 16:56:18 -0300
> Adrian Pardini wrote:
[...]
>> one file. Of course this opens the problem of checking third party
>> symbols from nasty stuff inside.
>
> That's a nice general-purpose idea. But as you mention, it is a
> serious securit
> Thanks DJ ~ more proof that the only stupid question is the one not
> asked!!!
For the opposite approach, though, see...
http://www.circuitcellar.com/archives/priorityinterrupt/244.html
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Thanks DJ ~ more proof that the only stupid question is the one not
asked!!!
On Thu, Jul 28, 2011 at 6:04 PM, DJ Delorie <[1]d...@delorie.com> wrote:
This is the type of problem that just screams "PIC10 !!" :-)
The lower cost of the simpler relay would easily pay for the l
This is the type of problem that just screams "PIC10 !!" :-)
The lower cost of the simpler relay would easily pay for the logic
chips, and you could add in some safety features and debouncing for
free.
Then dump the relay and use a power MOSFET :-)
http://search.digikey.com/scripts/DkSearch/dk
Alright guys I think I need a bit of help with the costs.
4pcb is expensive. I have around 80 or so SMD (mostly 0805's and some
IC's) and the quote feature they have on their website is quoting me
~$20 per board at a volume of 50. Even for a volume of 150 the price
only drops about $1.
Does anybo
Hi, I remember that some time ago one of us was working on a browser
based schematic viewer. Is it still being developed? I just found
CircuitBee [0] and it has no support (yet?) for gschem.
regards.
0. http://www.circuitbee.com/
--
Adrian.
http://ovejafm.com
http://elesquinazotango.com.ar
http
yamazakir2 wrote:
> I have had many boards manufactured but never had one also assembled.
If a projects is done more than about five times, I let a specialized
assembler populate the board. I live and work in Germany. So my answers
may not apply directly to you. But things will be similar in oth
I have pcbs made at 4pcb before so I'll give it a look. Thanks.
On Wed, Jul 27, 2011 at 2:09 PM, Russell Dill wrote:
> To get an online assembly quote, you have to register on the
> my4pcb.com site. I don't know how competitive the cost is, but given
> the quantity and complexity, if I'm going to
If any one needs pointers for a FAB house in the UK, there is a place in
Scotland I've had reasonable success with in the past. They do all the
component buying, and are very competitively priced.
I'm not convinced they use PCB's .xy files when I send them though, as
I've seen them miss components
On Wed, Jul 27, 2011 at 08:13:42PM -0400, Ethan Swint wrote:
> On 07/27/2011 05:57 PM, Stephen Ecob wrote:
>> On Thu, Jul 28, 2011 at 5:35 AM, yamazakir2 wrote:
>>> I sometimes get boards done at 4pcb, I didn't know they do assembly.
>>> How much to they charge? And how big of a reel do you have t
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