[TriEmbed] TriEmbed Digest, Vol 39, Issue 20
Chip McClelland
chip at mcclellands.org
Wed Aug 24 22:57:27 CDT 2016
Shane,
That makes a lot of sense. By looking at a specific time and for a specific carrier frequency (38 kHz), I can better see the signal against the background noise.
So, instead of a phototransistor circuit, I would use an IR receiver sensor such as this one - http://www.vishay.com/docs/82474/tssp4p38.pdf <http://www.vishay.com/docs/82474/tssp4p38.pdf>
To reduce the duty cycle, I would only run the 38kHz signal in bursts or 10-12 pulses.
Will check this out.
Chi
> On Aug 24, 2016, at 7:58 PM, triembed-request at triembed.org wrote:
>
> Send TriEmbed mailing list submissions to
> triembed at triembed.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
> or, via email, send a message with subject or body 'help' to
> triembed-request at triembed.org
>
> You can reach the person managing the list at
> triembed-owner at triembed.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of TriEmbed digest..."
>
>
> Today's Topics:
>
> 1. Re: TriEmbed Digest, Vol 39, Issue 19 (Chip McClelland)
> 2. Re: TriEmbed Digest, Vol 39, Issue 18 (Shane Trent)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 24 Aug 2016 18:55:27 -0700
> From: Chip McClelland <chip at mcclellands.org>
> To: triembed at triembed.org
> Subject: Re: [TriEmbed] TriEmbed Digest, Vol 39, Issue 19
> Message-ID: <F773AEFC-0708-49C4-BD44-D975746435E7 at mcclellands.org>
> Content-Type: text/plain; charset=us-ascii
>
> Alex,
>
> VERY COOL! I am definitely going to buy one of these. Two problems:
> - the pedestrians are walking perpendicular to the sensor so not as much of a doppler shift
> - at 37mA, it is way over my energy budget. I can only afford 2-3mA max.
>
> Still, cool.
>
> Chip
>
>
>> On Aug 24, 2016, at 6:49 PM, triembed-request at triembed.org wrote:
>>
>> Send TriEmbed mailing list submissions to
>> triembed at triembed.org
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>> or, via email, send a message with subject or body 'help' to
>> triembed-request at triembed.org
>>
>> You can reach the person managing the list at
>> triembed-owner at triembed.org
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of TriEmbed digest..."
>>
>>
>> Today's Topics:
>>
>> 1. Re: TriEmbed Digest, Vol 39, Issue 18 (Alex Davis)
>> 2. Re: TriEmbed Digest, Vol 39, Issue 18 (Chip McClelland)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Wed, 24 Aug 2016 13:33:20 -0400
>> From: Alex Davis <alexd at matrixwide.com>
>> To: triembed at triembed.org
>> Subject: Re: [TriEmbed] TriEmbed Digest, Vol 39, Issue 18
>> Message-ID:
>> <1472060000.2642054.704996873.58776D1D at webmail.messagingengine.com>
>> Content-Type: text/plain; charset="ISO-8859-1"
>>
>> tent-Type: text/plain; charset="utf-8"
>>>
>>> If you decide to use 38kHz carrier, you will either use a lot of energy
>>> or
>>> limit your distance.
>>> Here's my suggestion:
>>> 1. set IR LED's current to 100mA or higher (up to 1A,)
>>> 2. send 1us-5us pulses, 10 to 50 per second,
>>> 3. use pin interrupt and timer to detect and count missing pulses
>>> 4. use lens (LED) and IR filter (detector)
>>
>> I wonder if you could adapt these cheapo microwave doppler sensors -
>> maybe mount them in a 'cantenna' to make them directional?
>>
>> http://www.aliexpress.com/item/wholesale-HB100-5pcs-Wireless-Doppler-Radar-Microwave-Motion-Sensor-Module-and-microwave-motion-detector/545656348.html?ws_ab_test=searchweb201556_0,searchweb201602_5_10057_10056_10065_10055_10054_10059_10058_10017_107_10060_10061_10052_414_10062_10053_10050_10051,searchweb201603_7&btsid=f21587b3-a261-46b7-9e49-7bd3216a3d33
>>
>> You've probably got to accept a degree of false positives with those.
>>
>> Alex
>>
>>
>> --
>> "The theater of noise is proof of our potential."
>> |\ | (? \/ |?\ |V| |\ ?|? |?) | \/ | | | |?\ (? /? /\ |V|
>> |-||_ (_ /\ |_/ @| | |-| | | \ | /\ |^| | |_/ (_ . \_ \/ | |
>>
>> You won't find me on Facebook.
>>
>>
>>
>> ------------------------------
>>
>> Message: 2
>> Date: Wed, 24 Aug 2016 18:32:37 -0700
>> From: Chip McClelland <chip at mcclellands.org>
>> To: triembed at triembed.org
>> Subject: Re: [TriEmbed] TriEmbed Digest, Vol 39, Issue 18
>> Message-ID: <6C64A6AA-A568-45D8-83D1-88C5ED12E091 at mcclellands.org>
>> Content-Type: text/plain; charset="utf-8"
>>
>> Robert and all,
>>
>> So, here is what I am thinking, please let me know if there is a better way.
>>
>> 1) Transmitter - use a LMC555 timer to deliver 10 , 1uSec pulses a second in Astable mode. The data sheet <http://www.ti.com/lit/ds/symlink/lmc555.pdf> for the LMC555 timer says it can handle . This circuit will be turned on and off by the Arduino but that is all no PWM or triggering required. It will drive a 100mA 850nm emitter <http://www.marktechopto.com/pdf/products/datasheet/MTPS8085P_2015-05-07.pdf> with a very focused beam.
>>
>> 2) Receiver - I will use a matched 850nm phototransistor <http://www.vishay.com/docs/81527/bpw77n.pdf> wired as a common emitter amplifier. That way, the received pulse will cause the interrupt pin to go LOW and wake the Arduino.
>>
>> 3) Software, I will create a simple interrupt service routine that will register a pulse and determine how many if any pulses have been missed. I can use a running average smoothing function to get rid of noise so I don?t count a falling leaf.
>>
>>
>>
>> I hope I am not missing something. Is there a better way to do this? Will I run into issues with changing ambient light or rain / snow causing problems? Will see but any heads up are appreciated.
>>
>> Thanks,
>>
>> Chip
>>
>>
>>
>>> On Aug 24, 2016, at 10:00 AM, triembed-request at triembed.org wrote:
>>>
>>> Send TriEmbed mailing list submissions to
>>> triembed at triembed.org
>>>
>>> To subscribe or unsubscribe via the World Wide Web, visit
>>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>> or, via email, send a message with subject or body 'help' to
>>> triembed-request at triembed.org
>>>
>>> You can reach the person managing the list at
>>> triembed-owner at triembed.org
>>>
>>> When replying, please edit your Subject line so it is more specific
>>> than "Re: Contents of TriEmbed digest..."
>>>
>>>
>>> Today's Topics:
>>>
>>> 1. Re: TriEmbed Digest, Vol 39, Issue 16 (Robert Gasiorowski)
>>>
>>>
>>> ----------------------------------------------------------------------
>>>
>>> Message: 1
>>> Date: Tue, 23 Aug 2016 16:16:57 -0400
>>> From: Robert Gasiorowski <rgresume at gmail.com>
>>> To: Chip McClelland <chip at mcclellands.org>
>>> Cc: "triembed at triembed.org" <triembed at triembed.org>
>>> Subject: Re: [TriEmbed] TriEmbed Digest, Vol 39, Issue 16
>>> Message-ID:
>>> <CAEU50hUQ+S3f4_KTHTAXRCEmMx_tGiuGeb1k61Wq1atiCf12dw at mail.gmail.com>
>>> Content-Type: text/plain; charset="utf-8"
>>>
>>> If you decide to use 38kHz carrier, you will either use a lot of energy or
>>> limit your distance.
>>> Here's my suggestion:
>>> 1. set IR LED's current to 100mA or higher (up to 1A,)
>>> 2. send 1us-5us pulses, 10 to 50 per second,
>>> 3. use pin interrupt and timer to detect and count missing pulses
>>> 4. use lens (LED) and IR filter (detector)
>>>
>>> Alternatively, you could use short bursts of 38kHz carrier (also at higher
>>> current, but probably not as high as above.) This way, you could use one of
>>> Vishay's detectors, which usually come with IR filters.
>>>
>>> On Tue, Aug 23, 2016 at 1:23 PM, Chip McClelland via TriEmbed <
>>> triembed at triembed.org> wrote:
>>>
>>>> Alex, yes, bought and tested that one. But humans are not reflective sir
>>>> only about 12'. Cars to 30' easy so will eventually use it to replace the
>>>> pneumatic tubes across the road.
>>>>
>>>> Bought a matched pair of IR emitter and phototransistor yesterday. Will
>>>> see if I can build my own circuit as this seems to be a new and novel
>>>> application (!?).
>>>>
>>>> Thanks, chip
>>>>
>>>> On Tuesday, August 23, 2016, <triembed-request at triembed.org> wrote:
>>>>
>>>>> Send TriEmbed mailing list submissions to
>>>>> triembed at triembed.org
>>>>>
>>>>> To subscribe or unsubscribe via the World Wide Web, visit
>>>>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>>>> or, via email, send a message with subject or body 'help' to
>>>>> triembed-request at triembed.org
>>>>>
>>>>> You can reach the person managing the list at
>>>>> triembed-owner at triembed.org
>>>>>
>>>>> When replying, please edit your Subject line so it is more specific
>>>>> than "Re: Contents of TriEmbed digest..."
>>>>>
>>>>>
>>>>> Today's Topics:
>>>>>
>>>>> 1. Re: TriEmbed Digest, Vol 39, Issue 15 (Alex Davis)
>>>>>
>>>>>
>>>>> ----------------------------------------------------------------------
>>>>>
>>>>> Message: 1
>>>>> Date: Mon, 22 Aug 2016 13:28:21 -0400
>>>>> From: Alex Davis <alexd at matrixwide.com>
>>>>> To: triembed at triembed.org
>>>>> Subject: Re: [TriEmbed] TriEmbed Digest, Vol 39, Issue 15
>>>>> Message-ID:
>>>>> <1471886901.1337427.702662641.4268E605 at webmail.
>>>>> messagingengine.com>
>>>>> Content-Type: text/plain; charset="ISO-8859-1"
>>>>>
>>>>>
>>>>>> All, any ideas on a low power (5mA and 3.3-5V) IR beam sensor
>>>>>> (transmitter
>>>>>> and reflector) I could use in an outdoor setting? Need to count
>>>>>> pedestrians walking on a gravel road and the width - 30' - is too great
>>>>>> for
>>>>>> ultrasonic. Ideally, could buy the sensor components directly and
>>>>>> integrate
>>>>>> them with my data logger board.
>>>>>
>>>>> Chip,
>>>>>
>>>>> looks like this one (https://www.sparkfun.com/products/11724) can be had
>>>>> in a 10-meter version, and uses 2.9 mA average, so maybe ultrasonic
>>>>> would work.
>>>>>
>>>>> I think decent-range beam-break is going to take some decent current.
>>>>>
>>>>> Alex
>>>>>
>>>>> --
>>>>> "The theater of noise is proof of our potential."
>>>>> |\ | (? \/ |?\ |V| |\ ?|? |?) | \/ | | | |?\ (? /? /\ |V|
>>>>> |-||_ (_ /\ |_/ @| | |-| | | \ | /\ |^| | |_/ (_ . \_ \/ | |
>>>>>
>>>>> You won't find me on Facebook.
>>>>>
>>>>>
>>>>>
>>>>> ------------------------------
>>>>>
>>>>> Subject: Digest Footer
>>>>>
>>>>> _______________________________________________
>>>>> TriEmbed mailing list
>>>>> TriEmbed at triembed.org
>>>>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>>>>
>>>>>
>>>>> ------------------------------
>>>>>
>>>>> End of TriEmbed Digest, Vol 39, Issue 16
>>>>> ****************************************
>>>>>
>>>>
>>>>
>>>> --
>>>> Sent from my iPhone - please excuse the typos
>>>>
>>>> _______________________________________________
>>>> Triangle, NC Embedded Computing mailing list
>>>> TriEmbed at triembed.org
>>>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>>> TriEmbed web site: http://TriEmbed.org
>>>>
>>>>
>>> -------------- next part --------------
>>> An HTML attachment was scrubbed...
>>> URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20160823/8522d6a3/attachment-0001.html>
>>>
>>> ------------------------------
>>>
>>> Subject: Digest Footer
>>>
>>> _______________________________________________
>>> TriEmbed mailing list
>>> TriEmbed at triembed.org
>>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>>
>>>
>>> ------------------------------
>>>
>>> End of TriEmbed Digest, Vol 39, Issue 18
>>> ****************************************
>>
>> -------------- next part --------------
>> An HTML attachment was scrubbed...
>> URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20160824/b9db988b/attachment.html>
>> -------------- next part --------------
>> A non-text attachment was scrubbed...
>> Name: Screen Shot 2016-08-24 at 6.28.22 PM.png
>> Type: image/png
>> Size: 46926 bytes
>> Desc: not available
>> URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20160824/b9db988b/attachment.png>
>> -------------- next part --------------
>> A non-text attachment was scrubbed...
>> Name: Screen Shot 2016-08-24 at 6.27.39 PM.png
>> Type: image/png
>> Size: 18620 bytes
>> Desc: not available
>> URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20160824/b9db988b/attachment-0001.png>
>>
>> ------------------------------
>>
>> Subject: Digest Footer
>>
>> _______________________________________________
>> TriEmbed mailing list
>> TriEmbed at triembed.org
>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>
>>
>> ------------------------------
>>
>> End of TriEmbed Digest, Vol 39, Issue 19
>> ****************************************
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Thu, 25 Aug 2016 02:53:58 +0000
> From: Shane Trent <shanedtrent at gmail.com>
> To: Chip McClelland <chip at mcclellands.org>, triembed at triembed.org
> Subject: Re: [TriEmbed] TriEmbed Digest, Vol 39, Issue 18
> Message-ID:
> <CAAFjd3rs3=XRP9sNps_gevNupt=WVxzP3nSLJpQEOPBqQFXTUA at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Chip,
>
> You may have a hard time differentiating your pulses from ambient solar IR.
> And getting the level just right to trigger an interrupt reliability under
> changing solar brightness conditions may be a challenge. Good shielding of
> your receiver will help.
>
> You may need a modulated carrier to help pull your signal from the
> background IR. Some demodulators (IR detector) can lock on to the carrier
> in 10 cycles or so. In theory this means a demodulator could detect a
> packet of 38 kHz pulses that contains 10 pulses and have a total length of
> around 0.26 milliseconds.
>
> So you could gate your 555 timer (or just use a timer on the uController to
> generate the 38 kHz carrier) to generate packets of IR at high current but
> at a low repeat rate and use the output of your demodulator to trigger your
> interrupt. Using a 50% on/off ratio on a 38 kHz carrier you could sample
> your IR optical path for completion at a rate of 1.9 kHz (= 0.5 * 38 kHz /
> 10 pulses).
>
> So just figure out how quickly you need to sample to not miss an any
> objects and you are set. So if you decide you can sample at 38 Hz and catch
> everything you want, I believe you would be running at about a 1%
> duty-cycle on your IR emitter.
>
> You would set a timer to fire every 26 milliseconds and generate 10 cycles
> (may want to make it 11 or 12?) of 38 kHz (taking 0.26 milliseconds) and
> after the end of the last pulse check to see for a interrupt from the IR
> detector set the "detected" flag and go back to sleep until the 26
> millisecond timer fires again. Or would that make the LED duty-cycle 0.5%
> since it is only on for half of the 0.26 milliseconds? Anyway you can
> really hammer on the LED since your duty-cycle is so low. And you will sill
> have a low average current on the transmitter.
>
> Shane
>
> On Wed, Aug 24, 2016 at 9:49 PM Chip McClelland via TriEmbed <
> triembed at triembed.org> wrote:
>
>> Robert and all,
>>
>> So, here is what I am thinking, please let me know if there is a better
>> way.
>>
>> 1) Transmitter - use a LMC555 timer to deliver 10 , 1uSec pulses a second
>> in Astable mode. The data sheet
>> <http://www.ti.com/lit/ds/symlink/lmc555.pdf> for the LMC555 timer says
>> it can handle . This circuit will be turned on and off by the Arduino but
>> that is all no PWM or triggering required. It will drive a 100mA 850nm
>> emitter
>> <http://www.marktechopto.com/pdf/products/datasheet/MTPS8085P_2015-05-07.pdf> with
>> a very focused beam.
>>
>> 2) Receiver - I will use a matched 850nm phototransistor
>> <http://www.vishay.com/docs/81527/bpw77n.pdf> wired as a common emitter
>> amplifier. That way, the received pulse will cause the interrupt pin to go
>> LOW and wake the Arduino.
>>
>> 3) Software, I will create a simple interrupt service routine that will
>> register a pulse and determine how many if any pulses have been missed. I
>> can use a running average smoothing function to get rid of noise so I don?t
>> count a falling leaf.
>>
>>
>> I hope I am not missing something. Is there a better way to do this?
>> Will I run into issues with changing ambient light or rain / snow causing
>> problems? Will see but any heads up are appreciated.
>>
>> Thanks,
>>
>> Chip
>>
>>
>>
>> On Aug 24, 2016, at 10:00 AM, triembed-request at triembed.org wrote:
>>
>> Send TriEmbed mailing list submissions to
>> triembed at triembed.org
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>> or, via email, send a message with subject or body 'help' to
>> triembed-request at triembed.org
>>
>> You can reach the person managing the list at
>> triembed-owner at triembed.org
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of TriEmbed digest..."
>>
>>
>> Today's Topics:
>>
>> 1. Re: TriEmbed Digest, Vol 39, Issue 16 (Robert Gasiorowski)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Tue, 23 Aug 2016 16:16:57 -0400
>> From: Robert Gasiorowski <rgresume at gmail.com>
>> To: Chip McClelland <chip at mcclellands.org>
>> Cc: "triembed at triembed.org" <triembed at triembed.org>
>> Subject: Re: [TriEmbed] TriEmbed Digest, Vol 39, Issue 16
>> Message-ID:
>> <CAEU50hUQ+S3f4_KTHTAXRCEmMx_tGiuGeb1k61Wq1atiCf12dw at mail.gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>>
>>
>> If you decide to use 38kHz carrier, you will either use a lot of energy or
>> limit your distance.
>> Here's my suggestion:
>> 1. set IR LED's current to 100mA or higher (up to 1A,)
>> 2. send 1us-5us pulses, 10 to 50 per second,
>> 3. use pin interrupt and timer to detect and count missing pulses
>> 4. use lens (LED) and IR filter (detector)
>>
>> Alternatively, you could use short bursts of 38kHz carrier (also at higher
>> current, but probably not as high as above.) This way, you could use one of
>> Vishay's detectors, which usually come with IR filters.
>>
>> On Tue, Aug 23, 2016 at 1:23 PM, Chip McClelland via TriEmbed <
>> triembed at triembed.org> wrote:
>>
>> Alex, yes, bought and tested that one. But humans are not reflective sir
>> only about 12'. Cars to 30' easy so will eventually use it to replace the
>> pneumatic tubes across the road.
>>
>> Bought a matched pair of IR emitter and phototransistor yesterday. Will
>> see if I can build my own circuit as this seems to be a new and novel
>> application (!?).
>>
>> Thanks, chip
>>
>> On Tuesday, August 23, 2016, <triembed-request at triembed.org> wrote:
>>
>> Send TriEmbed mailing list submissions to
>> triembed at triembed.org
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>> or, via email, send a message with subject or body 'help' to
>> triembed-request at triembed.org
>>
>> You can reach the person managing the list at
>> triembed-owner at triembed.org
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of TriEmbed digest..."
>>
>>
>> Today's Topics:
>>
>> 1. Re: TriEmbed Digest, Vol 39, Issue 15 (Alex Davis)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Mon, 22 Aug 2016 13:28:21 -0400
>> From: Alex Davis <alexd at matrixwide.com>
>> To: triembed at triembed.org
>> Subject: Re: [TriEmbed] TriEmbed Digest, Vol 39, Issue 15
>> Message-ID:
>> <1471886901.1337427.702662641.4268E605 at webmail.
>> messagingengine.com>
>> Content-Type: text/plain; charset="ISO-8859-1"
>>
>>
>> All, any ideas on a low power (5mA and 3.3-5V) IR beam sensor
>> (transmitter
>> and reflector) I could use in an outdoor setting? Need to count
>> pedestrians walking on a gravel road and the width - 30' - is too great
>> for
>> ultrasonic. Ideally, could buy the sensor components directly and
>> integrate
>> them with my data logger board.
>>
>>
>> Chip,
>>
>> looks like this one (https://www.sparkfun.com/products/11724) can be had
>> in a 10-meter version, and uses 2.9 mA average, so maybe ultrasonic
>> would work.
>>
>> I think decent-range beam-break is going to take some decent current.
>>
>>
>>
>> Alex
>>
>> --
>> "The theater of noise is proof of our potential."
>>
>> |\ | (? \/ |?\ |V| |\ ?|? |?) | \/ | | | |?\ (? /? /\ |V|
>>
>>
>> |-||_ (_ /\ |_/ @| | |-| | | \ | /\ |^| | |_/ (_ . \_ \/ | |
>>
>> You won't find me on Facebook.
>>
>>
>>
>> ------------------------------
>>
>> Subject: Digest Footer
>>
>> _______________________________________________
>> TriEmbed mailing list
>> TriEmbed at triembed.org
>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>
>>
>> ------------------------------
>>
>> End of TriEmbed Digest, Vol 39, Issue 16
>> ****************************************
>>
>>
>>
>> --
>> Sent from my iPhone - please excuse the typos
>>
>>
>>
>> _______________________________________________
>> Triangle, NC Embedded Computing mailing list
>> TriEmbed at triembed.org
>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>> TriEmbed web site: http://TriEmbed.org
>>
>>
>> -------------- next part --------------
>> An HTML attachment was scrubbed...
>> URL: <
>> http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20160823/8522d6a3/attachment-0001.html
>>>
>>
>> ------------------------------
>>
>> Subject: Digest Footer
>>
>> _______________________________________________
>> TriEmbed mailing list
>> TriEmbed at triembed.org
>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>>
>>
>> ------------------------------
>>
>> End of TriEmbed Digest, Vol 39, Issue 18
>> ****************************************
>>
>>
>> _______________________________________________
>> Triangle, NC Embedded Computing mailing list
>> TriEmbed at triembed.org
>> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>> TriEmbed web site: http://TriEmbed.org
>>
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20160825/d551821d/attachment.html>
> -------------- next part --------------
> A non-text attachment was scrubbed...
> Name: Screen Shot 2016-08-24 at 6.28.22 PM.png
> Type: image/png
> Size: 46926 bytes
> Desc: not available
> URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20160825/d551821d/attachment.png>
> -------------- next part --------------
> A non-text attachment was scrubbed...
> Name: Screen Shot 2016-08-24 at 6.27.39 PM.png
> Type: image/png
> Size: 18620 bytes
> Desc: not available
> URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20160825/d551821d/attachment-0001.png>
> -------------- next part --------------
> A non-text attachment was scrubbed...
> Name: Screen Shot 2016-08-24 at 6.28.22 PM.png
> Type: image/png
> Size: 46926 bytes
> Desc: not available
> URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20160825/d551821d/attachment-0002.png>
> -------------- next part --------------
> A non-text attachment was scrubbed...
> Name: Screen Shot 2016-08-24 at 6.27.39 PM.png
> Type: image/png
> Size: 18620 bytes
> Desc: not available
> URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20160825/d551821d/attachment-0003.png>
>
> ------------------------------
>
> Subject: Digest Footer
>
> _______________________________________________
> TriEmbed mailing list
> TriEmbed at triembed.org
> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
>
>
> ------------------------------
>
> End of TriEmbed Digest, Vol 39, Issue 20
> ****************************************
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20160824/fbf95328/attachment.htm>
More information about the TriEmbed
mailing list