Hello, folks!
I would appreciate some advice or insights, what am I doing wrong.
What I want to do is to switch on and off a power to laser engraver diode.
It needs 12 VDC supply and it consumes ~1 A currrent.
Here is schematics of what I currently have:
http://picpaste.com/DSCF6164-vX7heUEq.jpg
On 25 January 2012 20:17, Kirk Wallace wrote:
> On Wed, 2012-01-25 at 19:52 +0200, Roland Jollivet wrote:
> ... snip
> > By the way, you are using a PNP package for a NPN device. Be sure to
> > change it before doing a layout.
> >
> > Regards
> > Roland
>
> Uugh, that's embarrassing. I got the p
2012/1/25 Viesturs Lācis
> 2012. gada 25. Jan. 19:39 "Roland Jollivet"
> rakstīja:
> >
> > >
> > Haha. Sorry, it's funny. The BD139 is a NPN, so the position was right,
> but
> > the symbol should have been changed from PNP to NPN. Otherwise, you can
> > leave the new drawing as is, but label it
nced Machine Controller (EMC)
> Subject: [Emc-users] DIY output driver
>
> Hello, folks!
>
> I would appreciate some advice or insights, what am I doing wrong.
>
> What I want to do is to switch on and off a power to laser
> engraver diode.
> It needs 12 VDC supply and
On Thu, Jan 19, 2012 at 5:08 PM, Viesturs Lācis wrote:
> Hello, folks!
>
> I would appreciate some advice or insights, what am I doing wrong.
>
> What I want to do is to switch on and off a power to laser engraver diode.
> It needs 12 VDC supply and it consumes ~1 A currrent.
>
> Here is schematic
klosow...@gmail.com]
> Sent: Thursday, January 19, 2012 5:33 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] DIY output driver
>
> On Thu, Jan 19, 2012 at 5:08 PM, Viesturs Lacis
> wrote:
>
> > Hello, folks!
> >
> > I would appreciate s
On Thursday, January 19, 2012 07:27:22 PM Viesturs Lācis did opine:
> Hello, folks!
>
> I would appreciate some advice or insights, what am I doing wrong.
>
> What I want to do is to switch on and off a power to laser engraver
> diode. It needs 12 VDC supply and it consumes ~1 A currrent.
>
> H
2012/1/20 Kirk Wallace :
> On Thu, 2012-01-19 at 17:32 -0500, Przemek Klosowski wrote:
>> On Thu, Jan 19, 2012 at 5:08 PM, Viesturs Lācis
>> wrote:
>>
>> > Hello, folks!
>> >
>> > I would appreciate some advice or insights, what am I doing wrong.
>> >
>> > What I want to do is to switch on and off
On Fri, 20 Jan 2012, Viesturs Lācis wrote:
Hello, folks!
I would appreciate some advice or insights, what am I doing wrong.
What I want to do is to switch on and off a power to laser engraver diode.
It needs 12 VDC supply and it consumes ~1 A currrent.
Here is schematics of what I currently h
2012/1/20 :
>
> Could you provide details about the laser
Manufacturer is www.kalecnc.com
Purchased from them on ebay:
http://www.ebay.com/itm/Industrial-808nm-800mw-Infrared-Focusable-Laser-Diode-Module-Cutter-w-TTL-/180781956841?pt=LH_DefaultDomain_0&hash=item2a1771bee9#ht_2189wt_1080
This uni
On Friday, January 20, 2012 12:07:16 PM Viesturs Lācis did opine:
> 2012/1/20 Kirk Wallace :
> > On Thu, 2012-01-19 at 17:32 -0500, Przemek Klosowski wrote:
> >> On Thu, Jan 19, 2012 at 5:08 PM, Viesturs Lؤپcis
wrote:
> >> > Hello, folks!
> >> >
> >> > I would appreciate some advice or insights,
2012/1/20 gene heskett :
>
> The rest if this modified drawing looks as if it should fly.
>
Ok, thanks! I will try to resolder and test it. In case of any
difficulties, I will report back :))
Viesturs
--
Keep Your Develo
On Fri, 2012-01-20 at 10:42 +0200, Viesturs Lācis wrote:
... snip
> Kirk, I repasted Your scheme here:
> http://picpaste.com/scheme-3V0w43QM.png
>
> Do I understand that includes also Steve's and Przemek's sugestions,
> if R2 is 200 ohm?
>
> The optoisolator is 4N25, the transistor is BD139.
>
>
2012/1/20 Kirk Wallace :
> On Fri, 2012-01-20 at 10:39 -0800, Kirk Wallace wrote:
>> On Fri, 2012-01-20 at 10:42 +0200, Viesturs Lācis wrote:
>> ... snip
>> > Kirk, I repasted Your scheme here:
>> > http://picpaste.com/scheme-3V0w43QM.png
> ... snip
>
> Revised schematic attached.
>
Thank You!
Vi
On Fri, 2012-01-20 at 21:05 +0200, Viesturs Lācis wrote:
> 2012/1/20 Kirk Wallace :
> > On Fri, 2012-01-20 at 10:39 -0800, Kirk Wallace wrote:
> >> On Fri, 2012-01-20 at 10:42 +0200, Viesturs Lācis wrote:
> >> ... snip
> >> > Kirk, I repasted Your scheme here:
> >> > http://picpaste.com/scheme-3V0w
2012/1/20 Kirk Wallace :
> On Fri, 2012-01-20 at 10:39 -0800, Kirk Wallace wrote:
>> On Fri, 2012-01-20 at 10:42 +0200, Viesturs Lācis wrote:
>> ... snip
>> > Kirk, I repasted Your scheme here:
>> > http://picpaste.com/scheme-3V0w43QM.png
> ... snip
>
> Revised schematic attached.
Pasted the schem
On 25 January 2012 19:41, Kirk Wallace wrote:
> On Wed, 2012-01-25 at 17:06 +0200, Viesturs Lācis wrote:
> ... snip
> > I tested by connecting/disconnecting 4N25 pin1 to GND and measured the
> > voltage on laser power pins.
>
> Do you mean pin 2? Shorting pin 2 to ground should complete the circu
2012. gada 25. Jan. 18:55 "Roland Jollivet"
rakstīja:
>
> On 25 January 2012 19:41, Kirk Wallace
wrote:
>
> > On Wed, 2012-01-25 at 17:06 +0200, Viesturs Lācis wrote:
> > ... snip
> > > I tested by connecting/disconnecting 4N25 pin1 to GND and measured the
> > > voltage on laser power pins.
> >
>
On Wed, 2012-01-25 at 19:52 +0200, Roland Jollivet wrote:
... snip
> By the way, you are using a PNP package for a NPN device. Be sure to
> change it before doing a layout.
>
> Regards
> Roland
Uugh, that's embarrassing. I got the part number from Viesturs' e-mail
reply, just pasted it in and di
Ok, now I got it.
Thank You, Kirk, for explanatory scheme!
Thank You, Roland, for pointing it out.
I will try in to resolder within next few hours and report back.
Viesturs
2012. gada 25. Jan. 19:19 "Kirk Wallace"
rakstīja:
> On Wed, 2012-01-25 at 19:52 +0200, Roland Jollivet wrote:
> ... snip
On Wed, 2012-01-25 at 10:17 -0800, Kirk Wallace wrote:
... snip
> I suppose the BD139 could be made to work, but I would need to build the
> circuit to say anything with confidence. See attached.
... snip
I suppose being able to use SPICE would help. Maybe I'll learn to use it
in another life.
ht
2012. gada 25. Jan. 19:39 "Roland Jollivet"
rakstīja:
>
> >
> Haha. Sorry, it's funny. The BD139 is a NPN, so the position was right,
but
> the symbol should have been changed from PNP to NPN. Otherwise, you can
> leave the new drawing as is, but label it as a BD138.
>
> The BD138 is PNP.
>
So do
2012. gada 25. Jan. 20:18 "Roland Jollivet"
rakstīja:
>
> 2012/1/25 Viesturs Lācis
>
> > 2012. gada 25. Jan. 19:39 "Roland Jollivet"
> > rakstīja:
> > >
> > > >
> > > Haha. Sorry, it's funny. The BD139 is a NPN, so the position was
right,
> > but
> > > the symbol should have been changed from PN
2012/1/25 Kirk Wallace :
> On Wed, 2012-01-25 at 21:16 +0200, Roland Jollivet wrote:
> ... snip
>> All I'm saying is;
>> BD138 is PNP
>> BD139 is NPN
>>
>> Just make sure that the symbol used matches the description, otherwise if
>> you automatically place the part, you'll have the wrong pin layout
On 25 January 2012 21:07, Viesturs Lācis wrote:
> Kirk, I am getting totally confused...
> What is the difference in schematics between both images in Your last
> email? I cannot see any...
The direction the arrow points in the transistor schematic symbol.
--
atp
The idea that there is no such
2012/1/25 andy pugh :
> On 25 January 2012 21:07, Viesturs Lācis wrote:
>
>> Kirk, I am getting totally confused...
>> What is the difference in schematics between both images in Your last
>> email? I cannot see any...
>
> The direction the arrow points in the transistor schematic symbol.
Ok, tha
On Wed, 2012-01-25 at 23:07 +0200, Viesturs Lācis wrote:
... snip
> Kirk, I am getting totally confused...
Sorry about that.
> What is the difference in schematics between both images in Your last
> email? I cannot see any...
NPN Not Pointing iN
|/ Collector
Base ---|
|\
On Wed, 2012-01-25 at 23:43 +0200, Viesturs Lācis wrote:
> 2012/1/25 andy pugh :
> > On 25 January 2012 21:07, Viesturs Lācis wrote:
> >
> >> Kirk, I am getting totally confused...
> >> What is the difference in schematics between both images in Your last
> >> email? I cannot see any...
> >
> > Th
2012/1/26 Kirk Wallace :
> On Wed, 2012-01-25 at 23:43 +0200, Viesturs Lācis wrote:
>> 2012/1/25 andy pugh :
>> > On 25 January 2012 21:07, Viesturs Lācis wrote:
>> >
>> >> Kirk, I am getting totally confused...
>> >> What is the difference in schematics between both images in Your last
>> >> emai
On 01/25/2012 01:43 PM, Viesturs Lācis wrote:
> 2012/1/25 andy pugh:
>> On 25 January 2012 21:07, Viesturs Lācis wrote:
>>
>>> Kirk, I am getting totally confused...
>>> What is the difference in schematics between both images in Your last
>>> email? I cannot see any...
>>
>> The direction the arr
On Thu, 2012-01-26 at 08:40 +0200, Viesturs Lācis wrote:
... snip
> Ground is shared on both sides, because 5V and 12V are supplied by PC's PSU.
> Is there a simple way I can drive that transistor without optoisolator?
I think you could add a smaller transistor in place of the
opto-isolator. See t
2012/1/26 Kirk Wallace :
> On Thu, 2012-01-26 at 08:40 +0200, Viesturs Lācis wrote:
>
> An off-the-shelf solid state relay might do the job too.
The relay was my first idea, but it turned out pretty quickly that
there are no such relays that could be driven directly by Mesa card -
even those with
Viesturs,
it seems to me that your laser diode is just acting as a "normal" LED,
not as a laser. This state is only achieved at a very distinct point up
on top of the voltage/current curve. The laser diode supply electronics
must take care of this which is a rather delicate controlling task. In
On Friday, January 27, 2012 10:07:52 AM Viesturs Lācis did opine:
> 2012/1/26 Kirk Wallace :
> > On Thu, 2012-01-26 at 08:40 +0200, Viesturs Lؤپcis wrote:
> > An off-the-shelf solid state relay might do the job too.
>
> The relay was my first idea, but it turned out pretty quickly that
> there a
2012/1/27 Peter Blodow :
> Viesturs,
> it seems to me that your laser diode is just acting as a "normal" LED,
> not as a laser. This state is only achieved at a very distinct point up
> on top of the voltage/current curve. The laser diode supply electronics
> must take care of this which is a rathe
On Friday, January 27, 2012 12:08:34 PM Viesturs Lācis did opine:
> 2012/1/27 Peter Blodow :
> > Viesturs,
> > it seems to me that your laser diode is just acting as a "normal" LED,
> > not as a laser. This state is only achieved at a very distinct point
> > up on top of the voltage/current curve.
On Fri, 2012-01-27 at 16:55 +0200, Viesturs Lācis wrote:
> 2012/1/26 Kirk Wallace :
> > On Thu, 2012-01-26 at 08:40 +0200, Viesturs Lācis wrote:
> >
> > An off-the-shelf solid state relay might do the job too.
>
> The relay was my first idea, but it turned out pretty quickly that
> there are no s
2012/1/27 gene heskett :
>
> Is there perchance an adjustment potentiometer? The LM317T is a linear
> regulator device and could be made adjustable so as to compensate for the
> wiring and switching loss in your controller.
>
Nope, I see 2 resistors in series for the middle leg.
>
> I'm sorry.
For those following this thread, just a reminder of what I think
Viesturs has.
eBay laser with controller:
http://www.ebay.com/itm/Industrial-808nm-800mw-Infrared-Focusable-Laser-Diode-Module-Cutter-w-TTL-/180781956841?pt=LH_DefaultDomain_0&hash=item2a1771bee9#ht_2189wt_1080
Short URL: http://al
On 27 January 2012 18:12, Kirk Wallace wrote:
> For those following this thread, just a reminder of what I think
> Viesturs has.
>
> eBay laser with controller:
> http://www.ebay.com/itm/Industrial-808nm-800mw-Infrared-Focusable-Laser-Diode-Module-Cutter-w-TTL-/180781956841
That sounds like it ne
2012/1/27 andy pugh :
> On 27 January 2012 18:12, Kirk Wallace wrote:
>> For those following this thread, just a reminder of what I think
>> Viesturs has.
>>
>> eBay laser with controller:
>> http://www.ebay.com/itm/Industrial-808nm-800mw-Infrared-Focusable-Laser-Diode-Module-Cutter-w-TTL-/1807819
On Friday, January 27, 2012 01:36:21 PM Viesturs Lācis did opine:
> 2012/1/27 gene heskett :
> > Is there perchance an adjustment potentiometer? The LM317T is a
> > linear regulator device and could be made adjustable so as to
> > compensate for the wiring and switching loss in your controller.
>
On Friday, January 27, 2012 01:50:53 PM Kirk Wallace did opine:
> For those following this thread, just a reminder of what I think
> Viesturs has.
>
> eBay laser with controller:
> http://www.ebay.com/itm/Industrial-808nm-800mw-Infrared-Focusable-Laser-
> Diode-Module-Cutter-w-TTL-/180781956841?p
On Friday, January 27, 2012 01:52:19 PM andy pugh did opine:
> On 27 January 2012 18:12, Kirk Wallace
wrote:
> > For those following this thread, just a reminder of what I think
> > Viesturs has.
> >
> > eBay laser with controller:
> > http://www.ebay.com/itm/Industrial-808nm-800mw-Infrared-Foc
On Friday, January 27, 2012 01:53:39 PM Viesturs Lācis did opine:
> 2012/1/27 andy pugh :
> > On 27 January 2012 18:12, Kirk Wallace
wrote:
> >> For those following this thread, just a reminder of what I think
> >> Viesturs has.
> >>
> >> eBay laser with controller:
> >> http://www.ebay.com/itm
2012/1/27 gene heskett :
>
> That depends. Can, if you just short your device, burn wood? If not, or
> only very much slower than you expected, then the wire is too small.
I could. Now it seems that my diy stopped working again - laser
receives ~3V DC regardless of the state of gpio output pin.
2012/1/27 gene heskett :
> On Friday, January 27, 2012 01:53:39 PM Viesturs Lācis did opine:
>
>> 2012/1/27 andy pugh :
>> > On 27 January 2012 18:12, Kirk Wallace
> wrote:
>> >> For those following this thread, just a reminder of what I think
>> >> Viesturs has.
>> >>
>> >> eBay laser with contro
On Friday, January 27, 2012 02:29:30 PM Viesturs Lācis did opine:
> 2012/1/27 gene heskett :
> > That depends. Can, if you just short your device, burn wood? If not,
> > or only very much slower than you expected, then the wire is too
> > small.
>
> I could. Now it seems that my diy stopped wor
On Friday, January 27, 2012 02:31:36 PM Viesturs Lācis did opine:
> 2012/1/27 gene heskett :
> > On Friday, January 27, 2012 01:53:39 PM Viesturs Lؤپcis did opine:
> >> 2012/1/27 andy pugh :
> >> > On 27 January 2012 18:12, Kirk Wallace
> >> >
> >
> > wrote:
> >> >> For those following this thre
On Fri, 2012-01-27 at 12:26 -0500, gene heskett wrote:
> The LM317T is a linear regulator device
> and could be made adjustable so as to compensate for the wiring and
> switching loss in your controller.
Judging from Viesturs' description in a later message:
> Nope, I see 2 resistors in series
On Fri, 2012-01-27 at 21:18 -0500, Ed Nisley wrote:
... snip
> At the risk of sounding like an Olde Farte, the easiest way to get this
> contraption working is a small mechanical relay: a few tens of mA in
> will switch an amp of DC on the output. No voltage drops, no muss, no
> fuss.
>
> The opto
On 01/27/2012 11:07 AM, Viesturs Lācis wrote:
> 2012/1/27 gene heskett:
>>
>> That depends. Can, if you just short your device, burn wood? If not, or
>> only very much slower than you expected, then the wire is too small.
>
> I could. Now it seems that my diy stopped working again - laser
> recei
2012/1/28 Rafael Skodlar :
>
> Of course that won't work with most if not all the suggestions I've seen
> so far. If I understand it correctly, your "laser" already has a circuit
> to drive it at reasonable current to do it's magic.
>
> Circuit I suggested earlier was under assumption you have a ba
On 28 January 2012 06:23, Viesturs Lācis wrote:
> BTW client was happy, when he saw the first hand-burned lines in the
> wood that I managed to do last night in that small moment, when the
> laser was working...
Can I suggest two other options?
1) Put the existing laser into "stock" for a futur
On 01/27/2012 10:23 PM, Viesturs Lācis wrote:
> 2012/1/28 Rafael Skodlar:
>>
>> Of course that won't work with most if not all the suggestions I've seen
>> so far. If I understand it correctly, your "laser" already has a circuit
>> to drive it at reasonable current to do it's magic.
>>
>> Circuit I
Viesturs,
if your laser seems too bulky - have you tried transporting the beam to
the work head via optic fibres? In the laser division of my former
company, we had several powerful (many, say, 50 watts output) gold vapor
ans other lasers that weighed about a ton each and filled a whole
labrato
2012/1/29 Peter Blodow :
> Viesturs,
> if your laser seems too bulky - have you tried transporting the beam to
> the work head via optic fibres?
The laser itself is less than 100g, so that is not the problem.
The machine itself has heavy construction as its primary task is wood routing.
That is wh
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