Best online tool to draw circuit diagrams?

Mr. Man-wai Chang · Aug 15, 2013

Your suggestion?

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Helmut Wabnig · Aug 15, 2013

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
<toylet.toylet@gmail.com> wrote:

Your suggestion?

I use the free version of EAGLE
http://www.cadsoft.de/2011/08/eagle-simulation/

w.

Ken Moffett · Aug 15, 2013

Helmut Wabnig <hwabnig@.- --- -.dotat> wrote in
news:2cbp09lp52e4jjh5m1j8u20jlll5o6tq4f@4ax.com:

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
toylet.toylet@gmail.com> wrote:

Your suggestion?

I use the free version of EAGLE
http://www.cadsoft.de/2011/08/eagle-simulation/

w.

For just schematics I really like ExpressPCB. But for PBCs, you
are locked into their board service. Still not bad.

Ken

Rich Webb · Aug 15, 2013

On 15 Aug 2013 11:09:46 GMT, Ken Moffett <KLMoffett@comcast.net>
wrote:

Helmut Wabnig <hwabnig@.- --- -.dotat> wrote in
news:2cbp09lp52e4jjh5m1j8u20jlll5o6tq4f@4ax.com:

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
toylet.toylet@gmail.com> wrote:

Your suggestion?

I use the free version of EAGLE
http://www.cadsoft.de/2011/08/eagle-simulation/

w.

For just schematics I really like ExpressPCB. But for PBCs, you
are locked into their board service. Still not bad.

Kicad. FOSS, with official builds for Windows and Linux plus an
unofficial-but-supported Mac version. Does hierarchical schematics and
real Gerbers.
http://www.kicad-pcb.org/display/KICAD/KiCad+EDA+Software+Suite

John Larkin · Aug 15, 2013

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
<toylet.toylet@gmail.com> wrote:

Your suggestion?

Depends on what you want to do with them. Schematic entry for PCB layout has to
be integrated with the layout software.

If it's just for presentation/discussion/breadboarding, LT Spice is OK, and lets
you simulate, too.

--

John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom timing and laser controllers
Photonics and fiberoptic TTL data links
VME analog, thermocouple, LVDT, synchro, tachometer
Multichannel arbitrary waveform generators

JW · Aug 15, 2013

On Thu, 15 Aug 2013 06:45:49 -0700 John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in Message id:
<8omp09lp5ljcm7tk9f3g5c50cqtmtlcf5k@4ax.com>:

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
toylet.toylet@gmail.com> wrote:

Your suggestion?

Depends on what you want to do with them. Schematic entry for PCB layout has to
be integrated with the layout software.

If it's just for presentation/discussion/breadboarding, LT Spice is OK, and lets
you simulate, too.

Can you simulate a shorted LED?

Michael Black · Aug 15, 2013

On Thu, 15 Aug 2013, JW wrote:

On Thu, 15 Aug 2013 06:45:49 -0700 John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in Message id:
8omp09lp5ljcm7tk9f3g5c50cqtmtlcf5k@4ax.com>:

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
toylet.toylet@gmail.com> wrote:

Your suggestion?

Depends on what you want to do with them. Schematic entry for PCB layout has to
be integrated with the layout software.

If it's just for presentation/discussion/breadboarding, LT Spice is OK, and lets
you simulate, too.

Can you simulate a shorted LED?

No, but surely all he needs is program enough to draw an led in series
with a resistor.

Michael

Jim Thompson · Aug 15, 2013

On Thu, 15 Aug 2013 10:20:08 -0400, JW <none@dev.null> wrote:

On Thu, 15 Aug 2013 06:45:49 -0700 John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in Message id:
8omp09lp5ljcm7tk9f3g5c50cqtmtlcf5k@4ax.com>:

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
toylet.toylet@gmail.com> wrote:

Your suggestion?

Depends on what you want to do with them. Schematic entry for PCB layout has to
be integrated with the layout software.

If it's just for presentation/discussion/breadboarding, LT Spice is OK, and lets
you simulate, too.

Can you simulate a shorted LED?

Yes ;-) One of my patent-apps-in-progress is for a means for a
multi-channel LED driver (for electronic billboards) to recognize and
report shorted and open LED's.

Though I expect a challenge from Larkin, he'll claim he already
invented it when he was quite young and was not astonished >:-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice

John Fields · Aug 16, 2013

On Thu, 15 Aug 2013 08:04:14 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Thu, 15 Aug 2013 10:20:08 -0400, JW <none@dev.null> wrote:

On Thu, 15 Aug 2013 06:45:49 -0700 John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in Message id:
8omp09lp5ljcm7tk9f3g5c50cqtmtlcf5k@4ax.com>:

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
toylet.toylet@gmail.com> wrote:

Your suggestion?

Depends on what you want to do with them. Schematic entry for PCB layout has to
be integrated with the layout software.

If it's just for presentation/discussion/breadboarding, LT Spice is OK, and lets
you simulate, too.

Can you simulate a shorted LED?

Yes ;-) One of my patent-apps-in-progress is for a means for a
multi-channel LED driver (for electronic billboards) to recognize and
report shorted and open LED's.

---
Do an A/D on each switchpoint and compare its output to limits set by
a magnitude comparator?

Nice.

---

Though I expect a challenge from Larkin, he'll claim he already
invented it when he was quite young and was not astonished >:-}

---
Indeed.

Larkin seems to be operating under the premise that everything he's
discovered, or invented, was a priori.

--
JF

Jim Thompson · Aug 16, 2013

On Thu, 15 Aug 2013 16:33:33 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Thu, 15 Aug 2013 08:04:14 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Thu, 15 Aug 2013 10:20:08 -0400, JW <none@dev.null> wrote:

On Thu, 15 Aug 2013 06:45:49 -0700 John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in Message id:
8omp09lp5ljcm7tk9f3g5c50cqtmtlcf5k@4ax.com>:

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
toylet.toylet@gmail.com> wrote:

Your suggestion?

Depends on what you want to do with them. Schematic entry for PCB layout has to
be integrated with the layout software.

If it's just for presentation/discussion/breadboarding, LT Spice is OK, and lets
you simulate, too.

Can you simulate a shorted LED?

Yes ;-) One of my patent-apps-in-progress is for a means for a
multi-channel LED driver (for electronic billboards) to recognize and
report shorted and open LED's.

---
Do an A/D on each switchpoint and compare its output to limits set by
a magnitude comparator?

Nice.

Far more clever than that, but I can't discuss for awhile.

---

Though I expect a challenge from Larkin, he'll claim he already
invented it when he was quite young and was not astonished >:-}

---
Indeed.

Larkin seems to be operating under the premise that everything he's
discovered, or invented, was a priori.

John Larkin · Aug 16, 2013

On Thu, 15 Aug 2013 10:20:08 -0400, JW <none@dev.null> wrote:

On Thu, 15 Aug 2013 06:45:49 -0700 John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in Message id:
8omp09lp5ljcm7tk9f3g5c50cqtmtlcf5k@4ax.com>:

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
toylet.toylet@gmail.com> wrote:

Your suggestion?

Depends on what you want to do with them. Schematic entry for PCB layout has to
be integrated with the layout software.

If it's just for presentation/discussion/breadboarding, LT Spice is OK, and lets
you simulate, too.

Can you simulate a shorted LED?

It might take a while to author and validate a device model, but I
think it can be done.

--

John Larkin Highland Technology, Inc

jlarkin at highlandtechnology dot com
http://www.highlandtechnology.com

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom laser drivers and controllers
Photonics and fiberoptic TTL data links
VME thermocouple, LVDT, synchro acquisition and simulation

Jim Thompson · Aug 16, 2013

On Thu, 15 Aug 2013 15:30:15 -0700, John Larkin
<jlarkin@highlandtechnology.com> wrote:

On Thu, 15 Aug 2013 10:20:08 -0400, JW <none@dev.null> wrote:

On Thu, 15 Aug 2013 06:45:49 -0700 John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in Message id:
8omp09lp5ljcm7tk9f3g5c50cqtmtlcf5k@4ax.com>:

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
toylet.toylet@gmail.com> wrote:

Your suggestion?

Depends on what you want to do with them. Schematic entry for PCB layout has to
be integrated with the layout software.

If it's just for presentation/discussion/breadboarding, LT Spice is OK, and lets
you simulate, too.

Can you simulate a shorted LED?

It might take a while to author and validate a device model, but I
think it can be done.

Whatever that means. Bwahahahahahaha >:-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice

P E Schoen · Aug 16, 2013

"Jim Thompson" wrote in message
news:j8rp09tj4iusa12lguoe2t33qvpnopbtqj@4ax.com...

Yes ;-) One of my patent-apps-in-progress is for a means for a
multi-channel LED driver (for electronic billboards) to recognize and
report shorted and open LED's.

Well, you could just set up a camera which would locate the DEDs, but if one
of a string was open, the entire string would be dead.

It should be simple enough to detect the loss of current if one of a string
opened, or the voltage difference when one shorted.

You could attach two LEDs in series across each LED in the matrix, so if an
LED opened, the two LEDs would light instead.

It might be possible to use TDR
(http://en.wikipedia.org/wiki/Time-domain_reflectometer) to locate the open
or shorted LED by its signature on the return pulse waveform which should
differ from the normal LED, and the time will locate the offending device.

Though I expect a challenge from Larkin, he'll claim he already
invented it when he was quite young and was not astonished >:-}

It takes something truly remarkable these days to elicit astonishment, or to
obtain a patent. Most patents seem to be granted because of the applicant's
skill at technological obfuscation along with the patent examiner's lack of
comprehension or expertise in highly specialized and complex niches of
technology.

I like LTspice for schematics. And the Mentor Graphics PADS suite for PCBs
as well as overall assemblies. I print the schematics to PDF and convert
them to JPG or PNG format for presentation in a universally readable format,
like http://enginuitysystems.com/pix/12V_SLA_BMS_PIC12F1822_001.png.

Paul

Daniel Pitts · Aug 16, 2013

On 8/15/13 2:43 AM, Mr. Man-wai Chang wrote:

Your suggestion?

I haven't tried it in a while, but http://www.circuits.io/ seemed promising.

Jim Thompson · Aug 16, 2013

On Thu, 15 Aug 2013 17:43:37 +0800, "Mr. Man-wai Chang"
<toylet.toylet@gmail.com> wrote:

Your suggestion?

John Larkin · Aug 16, 2013

On Thu, 15 Aug 2013 21:28:32 -0400, "P E Schoen" <paul@peschoen.com>
wrote:

"Jim Thompson" wrote in message
news:j8rp09tj4iusa12lguoe2t33qvpnopbtqj@4ax.com...

Yes ;-) One of my patent-apps-in-progress is for a means for a
multi-channel LED driver (for electronic billboards) to recognize and
report shorted and open LED's.

Well, you could just set up a camera which would locate the DEDs, but if one
of a string was open, the entire string would be dead.

It should be simple enough to detect the loss of current if one of a string
opened, or the voltage difference when one shorted.

You could attach two LEDs in series across each LED in the matrix, so if an
LED opened, the two LEDs would light instead.

It might be possible to use TDR
(http://en.wikipedia.org/wiki/Time-domain_reflectometer) to locate the open
or shorted LED by its signature on the return pulse waveform which should
differ from the normal LED, and the time will locate the offending device.

Though I expect a challenge from Larkin, he'll claim he already
invented it when he was quite young and was not astonished >:-}

It takes something truly remarkable these days to elicit astonishment, or to
obtain a patent. Most patents seem to be granted because of the applicant's
skill at technological obfuscation along with the patent examiner's lack of
comprehension or expertise in highly specialized and complex niches of
technology.

I like LTspice for schematics. And the Mentor Graphics PADS suite for PCBs
as well as overall assemblies. I print the schematics to PDF and convert
them to JPG or PNG format for presentation in a universally readable format,
like http://enginuitysystems.com/pix/12V_SLA_BMS_PIC12F1822_001.png.

Paul

Kinda garish for my taste. And the caps are invisible.

This is from PADS:

https://dl.dropboxusercontent.com/u/53724080/Circuits/Z206.pdf

Nice dignified black and white.

--

John Larkin Highland Technology, Inc

jlarkin at highlandtechnology dot com
http://www.highlandtechnology.com

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom laser drivers and controllers
Photonics and fiberoptic TTL data links
VME thermocouple, LVDT, synchro acquisition and simulation

Jasen Betts · Aug 17, 2013

On 2013-08-15, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Thu, 15 Aug 2013 10:20:08 -0400, JW <none@dev.null> wrote:

Yes ;-) One of my patent-apps-in-progress is for a means for a
multi-channel LED driver (for electronic billboards) to recognize and
report shorted and open LED's.

Do you look at the voltage on the current source output,
or is it something non-obvious?

--
ââ 100% natural

--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

Mr. Man-wai Chang · Aug 17, 2013

Thank you all for the replies!

--
@~@ Remain silent. Nothing from soldiers and magicians is real!
/ v \ Simplicity is Beauty! May the Force and farces be with you!
/( _ )\ (Fedora 19 i686) Linux 3.10.6-200.fc19.i686
^ ^ 19:48:02 up 2 days 33 min 0 users load average: 0.00 0.01 0.05
ä¸ĺč˛¸! ä¸čŠé¨! ä¸ć´äş¤! ä¸ćäş¤! ä¸ćĺŤ! ä¸čŞćŽş! čŤčćŽçść´ (CSSA):
http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa

Jim Thompson · Aug 17, 2013

On 17 Aug 2013 08:11:21 GMT, Jasen Betts <jasen@xnet.co.nz> wrote:

On 2013-08-15, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:
On Thu, 15 Aug 2013 10:20:08 -0400, JW <none@dev.null> wrote:

Yes ;-) One of my patent-apps-in-progress is for a means for a
multi-channel LED driver (for electronic billboards) to recognize and
report shorted and open LED's.

Do you look at the voltage on the current source output,
or is it something non-obvious?

An observation of a subtle effect seen during simulation led (sic

me to an unusual, but quite accurate technique... Eureka >:-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice

Best online tool to draw circuit diagrams?

Mr. Man-wai Chang

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Helmut Wabnig

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Rich Webb

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John Larkin

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JW

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John Larkin

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