Stretch 0.5sec pulse to 6sec

John Fields · Feb 7, 2013

On Tue, 05 Feb 2013 10:07:35 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Sort of an off-the-wall thought...

Count the 'lerts >:-}

...Jim Thompson

What I was musing over...

Your pulse sets a flop, the flop applies the drive to the 3904.

"Listen" to three alerts, then reset the flop.

No timer required. No TC's. No critical time matching to ensure only
three 'lerts.

...Jim Thompson
---

Clever!

In the same vein, I've been trying to come up with a single-chip
solution (no glue logic or external components allowed) which could
get rid of the flop by using an asynchronously presettable down-
counter using the 0.5s pulse to do the broadside load, the "alert"
signal to do the clocking, and the counter's Terminal Count output to
freeze the counter, kill the output to the walkie-talkie, and wait for
the next input pulse to start the cycle anew.

So far, I think all of the 74XX and CD40XX parts need glue logic to
interface with the OP's device, but he never really gave us much
information as to the polarities required of its inputs and outputs.

Comments?

--
JF

Jim Thompson · Feb 7, 2013

On Thu, 07 Feb 2013 16:54:38 -0600, John Fields
<jfields@austininstruments.com> wrote:

On Tue, 05 Feb 2013 10:07:35 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Sort of an off-the-wall thought...

Count the 'lerts >:-}

...Jim Thompson

What I was musing over...

Your pulse sets a flop, the flop applies the drive to the 3904.

"Listen" to three alerts, then reset the flop.

No timer required. No TC's. No critical time matching to ensure only
three 'lerts.

...Jim Thompson
---
Clever!

In the same vein, I've been trying to come up with a single-chip
solution (no glue logic or external components allowed) which could
get rid of the flop by using an asynchronously presettable down-
counter using the 0.5s pulse to do the broadside load, the "alert"
signal to do the clocking, and the counter's Terminal Count output to
freeze the counter, kill the output to the walkie-talkie, and wait for
the next input pulse to start the cycle anew.

So far, I think all of the 74XX and CD40XX parts need glue logic to
interface with the OP's device, but he never really gave us much
information as to the polarities required of its inputs and outputs.

Comments?

Since the OP apparently hardwires into the walkie-talkie buttons, it
should be no additional heartburn to wire into the audio. I'd guess
it would be necessary to determine the 'lert frequency.

Isn't a lert somewhat like a tern... as in, "Leave no tern unstoned"
?

John Fields · Feb 8, 2013

On Thu, 07 Feb 2013 16:33:14 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Thu, 07 Feb 2013 16:54:38 -0600, John Fields
jfields@austininstruments.com> wrote:

On Tue, 05 Feb 2013 10:07:35 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Sort of an off-the-wall thought...

Count the 'lerts >:-}

...Jim Thompson

What I was musing over...

Your pulse sets a flop, the flop applies the drive to the 3904.

"Listen" to three alerts, then reset the flop.

No timer required. No TC's. No critical time matching to ensure only
three 'lerts.

...Jim Thompson
---
Clever!

In the same vein, I've been trying to come up with a single-chip
solution (no glue logic or external components allowed) which could
get rid of the flop by using an asynchronously presettable down-
counter using the 0.5s pulse to do the broadside load, the "alert"
signal to do the clocking, and the counter's Terminal Count output to
freeze the counter, kill the output to the walkie-talkie, and wait for
the next input pulse to start the cycle anew.

So far, I think all of the 74XX and CD40XX parts need glue logic to
interface with the OP's device, but he never really gave us much
information as to the polarities required of its inputs and outputs.

Comments?

Since the OP apparently hardwires into the walkie-talkie buttons, it
should be no additional heartburn to wire into the audio. I'd guess
it would be necessary to determine the 'lert frequency.

---
I don't think so since, from his post, he wants a 1/2 second pulse
(ostensibly detected from a remote transmission) from the receiver to
be stretched into a pulse long enough to allow three "alert" signals
to be generated by the receiver.

Since the stretched pulse is DC, the implication is that as long as
it's active the receiver will continue to generate the "alert" signal
in the form of tone bursts.

If that's true, then the frequency of the "alert" tone will be
irrelevant, while the number of tone burst packets - counted using
your idea - will be important.

---

Isn't a lert somewhat like a tern... as in, "Leave no tern unstoned"
?

---
No.
--
JF

amdx · Feb 11, 2013

On 2/10/2013 10:26 AM, Jim Thompson wrote:

On Sun, 10 Feb 2013 06:19:11 -0600, John Fields
jfields@austininstruments.com> wrote:

On Sat, 09 Feb 2013 22:57:27 -0600, amdx <amdx@knologynotthis.net
wrote:

On 2/8/2013 4:01 PM, John Fields wrote:
On Thu, 07 Feb 2013 16:33:14 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Thu, 07 Feb 2013 16:54:38 -0600, John Fields
jfields@austininstruments.com> wrote:

On Tue, 05 Feb 2013 10:07:35 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Sort of an off-the-wall thought...

Count the 'lerts >:-}

...Jim Thompson

What I was musing over...

Your pulse sets a flop, the flop applies the drive to the 3904.

"Listen" to three alerts, then reset the flop.

No timer required. No TC's. No critical time matching to ensure only
three 'lerts.

...Jim Thompson
---
Clever!

In the same vein, I've been trying to come up with a single-chip
solution (no glue logic or external components allowed) which could
get rid of the flop by using an asynchronously presettable down-
counter using the 0.5s pulse to do the broadside load, the "alert"
signal to do the clocking, and the counter's Terminal Count output to
freeze the counter, kill the output to the walkie-talkie, and wait for
the next input pulse to start the cycle anew.

So far, I think all of the 74XX and CD40XX parts need glue logic to
interface with the OP's device, but he never really gave us much
information as to the polarities required of its inputs and outputs.

Comments?

Since the OP apparently hardwires into the walkie-talkie buttons, it
should be no additional heartburn to wire into the audio. I'd guess
it would be necessary to determine the 'lert frequency.

---
I don't think so since, from his post, he wants a 1/2 second pulse
(ostensibly detected from a remote transmission) from the receiver to
be stretched into a pulse long enough to allow three "alert" signals
to be generated by the receiver.

Since the stretched pulse is DC, the implication is that as long as
it's active the receiver will continue to generate the "alert" signal
in the form of tone bursts.

If that's true, then the frequency of the "alert" tone will be
irrelevant, while the number of tone burst packets - counted using
your idea - will be important.

Well said John, and also correct.

Mikek

---
Thank you!

Is there a counter chip that has hysteresis on the CLK input? Main
problem I see on a one-chip solution is counting the packets due to
ratty risetime.

...Jim Thompson

The walk/talk has (ICs) on the board that have potting over them.

Mikek

John Fields · Feb 11, 2013

On Sun, 10 Feb 2013 19:05:01 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Sun, 10 Feb 2013 14:55:40 -0600, John Fields
jfields@austininstruments.com> wrote:

On Sun, 10 Feb 2013 13:27:28 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Stop feeding Ian a way to have a podium.

---
Why should I attract my prey according to your vagaries?

Well? Then EAT Ian and put him out of his misery.

---
I'm not coprophagous.
---

At the moment I don't note
anyone giving Ian any nevermind except you and Larkin. Everyone else
recognizes the dumb-ass and ignores him.

---
More's the pity, since he should be apprised of his idiocy and given a
chance to recant.

Gawwwd! Recant? You think yourself a monk ?:-}

...Jim Thompson
---

Nope.

Poor choice of words, since idiocy is involuntary.

Thanks,

--
JF

John Fields · Feb 11, 2013

On Sun, 10 Feb 2013 21:31:46 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:cd1gh89pfiuc5glc6jv7ec6622mbmuodv2@4ax.com...
On Sun, 10 Feb 2013 13:27:28 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Stop feeding Ian a way to have a podium.

---
Why should I attract my prey according to your vagaries?

Well at least you're leaving someone else alone!

---
No one else is as deserving of ridicule as you.

--
JF

John Fields · Feb 11, 2013

On Sun, 10 Feb 2013 21:34:38 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:490gh8h8f851ojm325r630pbk6ti0d29d1@4ax.com...
On Sun, 10 Feb 2013 19:53:14 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:c4mfh8t431e9ni44seiu5m04816nnj8eiv@4ax.com...
On Sun, 10 Feb 2013 09:26:07 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Sun, 10 Feb 2013 06:19:11 -0600, John Fields
jfields@austininstruments.com> wrote:

On Sat, 09 Feb 2013 22:57:27 -0600, amdx <amdx@knologynotthis.net
wrote:

On 2/8/2013 4:01 PM, John Fields wrote:
On Thu, 07 Feb 2013 16:33:14 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Thu, 07 Feb 2013 16:54:38 -0600, John Fields
jfields@austininstruments.com> wrote:

On Tue, 05 Feb 2013 10:07:35 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Sort of an off-the-wall thought...

Count the 'lerts >:-}

...Jim Thompson

What I was musing over...

Your pulse sets a flop, the flop applies the drive to the 3904.

"Listen" to three alerts, then reset the flop.

No timer required. No TC's. No critical time matching to ensure
only
three 'lerts.

...Jim Thompson
---
Clever!

In the same vein, I've been trying to come up with a single-chip
solution (no glue logic or external components allowed) which
could
get rid of the flop by using an asynchronously presettable down-
counter using the 0.5s pulse to do the broadside load, the "alert"
signal to do the clocking, and the counter's Terminal Count output
to
freeze the counter, kill the output to the walkie-talkie, and wait
for
the next input pulse to start the cycle anew.

So far, I think all of the 74XX and CD40XX parts need glue logic
to
interface with the OP's device, but he never really gave us much
information as to the polarities required of its inputs and
outputs.

Comments?

Since the OP apparently hardwires into the walkie-talkie buttons,
it
should be no additional heartburn to wire into the audio. I'd
guess
it would be necessary to determine the 'lert frequency.

---
I don't think so since, from his post, he wants a 1/2 second pulse
(ostensibly detected from a remote transmission) from the receiver
to
be stretched into a pulse long enough to allow three "alert" signals
to be generated by the receiver.

Since the stretched pulse is DC, the implication is that as long as
it's active the receiver will continue to generate the "alert"
signal
in the form of tone bursts.

If that's true, then the frequency of the "alert" tone will be
irrelevant, while the number of tone burst packets - counted using
your idea - will be important.

Well said John, and also correct.

Mikek

---
Thank you!

Is there a counter chip that has hysteresis on the CLK input?

Main problem I see on a one-chip solution is counting the packets due to
ratty risetime.

...Jim Thompson
---
---
I don't know of any counters with Schmitt triggers on the clock
inputs,

I know of the next best thing - but you'd only start an argument if I told
you!

---
Then, to keep from wasting everyone's time, shut the fuck up.

My information is accurate - I can't be held responsible for you whining
because you're too incompetent to use it!

---
Yeah, like there really _are_ thermistor based PIR motion detectors
and all Fresnel lenses are transparent only to IR?

--
JF

Ian Field · Feb 11, 2013

"John Fields" <jfields@austininstruments.com> wrote in message
news:1t7hh8dr4ulo3sphli5o9689cu31cbgu7o@4ax.com...

On Sun, 10 Feb 2013 21:31:46 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:cd1gh89pfiuc5glc6jv7ec6622mbmuodv2@4ax.com...
On Sun, 10 Feb 2013 13:27:28 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Stop feeding Ian a way to have a podium.

---
Why should I attract my prey according to your vagaries?

Well at least you're leaving someone else alone!

---
No one else is as deserving of ridicule as you.

FFS - do you ever stop whining!

Ian Field · Feb 11, 2013

"John Fields" <jfields@austininstruments.com> wrote in message
news:mb8hh89gsagqefn6qk4cjcvhlidgailmic@4ax.com...

On Sun, 10 Feb 2013 21:34:38 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:490gh8h8f851ojm325r630pbk6ti0d29d1@4ax.com...
On Sun, 10 Feb 2013 19:53:14 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:c4mfh8t431e9ni44seiu5m04816nnj8eiv@4ax.com...
On Sun, 10 Feb 2013 09:26:07 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Sun, 10 Feb 2013 06:19:11 -0600, John Fields
jfields@austininstruments.com> wrote:

On Sat, 09 Feb 2013 22:57:27 -0600, amdx <amdx@knologynotthis.net
wrote:

On 2/8/2013 4:01 PM, John Fields wrote:
On Thu, 07 Feb 2013 16:33:14 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Thu, 07 Feb 2013 16:54:38 -0600, John Fields
jfields@austininstruments.com> wrote:

On Tue, 05 Feb 2013 10:07:35 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Sort of an off-the-wall thought...

Count the 'lerts >:-}

...Jim Thompson

What I was musing over...

Your pulse sets a flop, the flop applies the drive to the 3904.

"Listen" to three alerts, then reset the flop.

No timer required. No TC's. No critical time matching to
ensure
only
three 'lerts.

...Jim Thompson
---
Clever!

In the same vein, I've been trying to come up with a single-chip
solution (no glue logic or external components allowed) which
could
get rid of the flop by using an asynchronously presettable down-
counter using the 0.5s pulse to do the broadside load, the
"alert"
signal to do the clocking, and the counter's Terminal Count
output
to
freeze the counter, kill the output to the walkie-talkie, and
wait
for
the next input pulse to start the cycle anew.

So far, I think all of the 74XX and CD40XX parts need glue logic
to
interface with the OP's device, but he never really gave us much
information as to the polarities required of its inputs and
outputs.

Comments?

Since the OP apparently hardwires into the walkie-talkie buttons,
it
should be no additional heartburn to wire into the audio. I'd
guess
it would be necessary to determine the 'lert frequency.

---
I don't think so since, from his post, he wants a 1/2 second
pulse
(ostensibly detected from a remote transmission) from the receiver
to
be stretched into a pulse long enough to allow three "alert"
signals
to be generated by the receiver.

Since the stretched pulse is DC, the implication is that as long
as
it's active the receiver will continue to generate the "alert"
signal
in the form of tone bursts.

If that's true, then the frequency of the "alert" tone will be
irrelevant, while the number of tone burst packets - counted using
your idea - will be important.

Well said John, and also correct.

Mikek

---
Thank you!

Is there a counter chip that has hysteresis on the CLK input?

Main problem I see on a one-chip solution is counting the packets due
to
ratty risetime.

...Jim Thompson
---
---
I don't know of any counters with Schmitt triggers on the clock
inputs,

I know of the next best thing - but you'd only start an argument if I
told
you!

---
Then, to keep from wasting everyone's time, shut the fuck up.

My information is accurate - I can't be held responsible for you whining
because you're too incompetent to use it!

---
Yeah, like there really _are_ thermistor based PIR motion detectors
and all Fresnel lenses are transparent only to IR?

Its your primary school reading level that led you to think I said they were
thermistors.

And/or deviant twisting what I said.

I'll dumb it down so even you can understand - I was citing an example of
the fast response of thin film technology.

So quit whining and STFU.

John Fields · Feb 23, 2013

On Thu, 07 Feb 2013 16:54:38 -0600, John Fields
<jfields@austininstruments.com> wrote:

On Tue, 05 Feb 2013 10:07:35 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Sort of an off-the-wall thought...

Count the 'lerts >:-}

...Jim Thompson

What I was musing over...

Your pulse sets a flop, the flop applies the drive to the 3904.

"Listen" to three alerts, then reset the flop.

No timer required. No TC's. No critical time matching to ensure only
three 'lerts.

...Jim Thompson
---
Clever!

In the same vein, I've been trying to come up with a single-chip
solution (no glue logic or external components allowed) which could
get rid of the flop by using an asynchronously presettable down-
counter using the 0.5s pulse to do the broadside load, the "alert"
signal to do the clocking, and the counter's Terminal Count output to
freeze the counter, kill the output to the walkie-talkie, and wait for
the next input pulse to start the cycle anew.

So far, I think all of the 74XX and CD40XX parts need glue logic to
interface with the OP's device, but he never really gave us much
information as to the polarities required of its inputs and outputs.

Comments?
--

JF

John Fields · Feb 24, 2013

On Mon, 11 Feb 2013 18:07:23 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:1t7hh8dr4ulo3sphli5o9689cu31cbgu7o@4ax.com...
On Sun, 10 Feb 2013 21:31:46 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:cd1gh89pfiuc5glc6jv7ec6622mbmuodv2@4ax.com...
On Sun, 10 Feb 2013 13:27:28 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Stop feeding Ian a way to have a podium.

---
Why should I attract my prey according to your vagaries?

Well at least you're leaving someone else alone!

---
No one else is as deserving of ridicule as you.

FFS - do you ever stop whining!

---
An attack is hardly whining, and an interrogative sentence should be
terminated with an eroteme.

--
JF

Ian Field · Feb 24, 2013

"John Fields" <jfields@austininstruments.com> wrote in message
news:lc3li8hfgv23loqja17l97vtr3bt9egp59@4ax.com...

On Mon, 11 Feb 2013 18:07:23 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:1t7hh8dr4ulo3sphli5o9689cu31cbgu7o@4ax.com...
On Sun, 10 Feb 2013 21:31:46 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:cd1gh89pfiuc5glc6jv7ec6622mbmuodv2@4ax.com...
On Sun, 10 Feb 2013 13:27:28 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Stop feeding Ian a way to have a podium.

---
Why should I attract my prey according to your vagaries?

Well at least you're leaving someone else alone!

---
No one else is as deserving of ridicule as you.

FFS - do you ever stop whining!

---
An attack is hardly whining, and an interrogative sentence should be
terminated with an eroteme.

It took you a whole week to think up a reply!!!!!!!

Ian Field · Feb 25, 2013

"John Fields" <jfields@austininstruments.com> wrote in message
news:s55li8dicmfbmiov6ntcm4jucvqvq9cklc@4ax.com...

On Sun, 24 Feb 2013 22:26:53 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:lc3li8hfgv23loqja17l97vtr3bt9egp59@4ax.com...
On Mon, 11 Feb 2013 18:07:23 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:1t7hh8dr4ulo3sphli5o9689cu31cbgu7o@4ax.com...
On Sun, 10 Feb 2013 21:31:46 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:cd1gh89pfiuc5glc6jv7ec6622mbmuodv2@4ax.com...
On Sun, 10 Feb 2013 13:27:28 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Stop feeding Ian a way to have a podium.

---
Why should I attract my prey according to your vagaries?

Well at least you're leaving someone else alone!

---
No one else is as deserving of ridicule as you.

FFS - do you ever stop whining!

---
An attack is hardly whining, and an interrogative sentence should be
terminated with an eroteme.

It took you a whole week to think up a reply!!!!!!!

---
Nope, I just put your trash on the back burner and grace you with
replies at my leisure.

A "whole week" was it?

At least - a keyboard rambo slacking on the job - that'll never do!

Ian Field · Feb 25, 2013

"amdx" <amdx@knologynotthis.net> wrote in message
news:80172$512abd3e$18ec6dd7$28579@KNOLOGY.NET...

On 2/24/2013 5:32 PM, krw@attt.bizz wrote:
On Sun, 24 Feb 2013 22:26:53 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:lc3li8hfgv23loqja17l97vtr3bt9egp59@4ax.com...
On Mon, 11 Feb 2013 18:07:23 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:1t7hh8dr4ulo3sphli5o9689cu31cbgu7o@4ax.com...
On Sun, 10 Feb 2013 21:31:46 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:cd1gh89pfiuc5glc6jv7ec6622mbmuodv2@4ax.com...
On Sun, 10 Feb 2013 13:27:28 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Stop feeding Ian a way to have a podium.

---
Why should I attract my prey according to your vagaries?

Well at least you're leaving someone else alone!

---
No one else is as deserving of ridicule as you.

FFS - do you ever stop whining!

---
An attack is hardly whining, and an interrogative sentence should be
terminated with an eroteme.

It took you a whole week to think up a reply!!!!!!!

Two. He is slow.

You all will be happy to know that my alert system has been installed and
working *flawlessly for about two weeks. I have not seen any misses with
the infrared sensor unit and the walkie talkie has all the range I need
for my walks around the marina.

* I did have another alert on a bird, but I'll take it.

If your driveway sensor is a PIR - allegedly even large moths can set them
off.

Ian Field · Feb 25, 2013

<krw@attt.bizz> wrote in message
news:do8li8tqpfj748gd0oodb66t2cdad5uik7@4ax.com...

On Sun, 24 Feb 2013 22:26:53 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:lc3li8hfgv23loqja17l97vtr3bt9egp59@4ax.com...
On Mon, 11 Feb 2013 18:07:23 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:1t7hh8dr4ulo3sphli5o9689cu31cbgu7o@4ax.com...
On Sun, 10 Feb 2013 21:31:46 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:cd1gh89pfiuc5glc6jv7ec6622mbmuodv2@4ax.com...
On Sun, 10 Feb 2013 13:27:28 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Stop feeding Ian a way to have a podium.

---
Why should I attract my prey according to your vagaries?

Well at least you're leaving someone else alone!

---
No one else is as deserving of ridicule as you.

FFS - do you ever stop whining!

---
An attack is hardly whining, and an interrogative sentence should be
terminated with an eroteme.

It took you a whole week to think up a reply!!!!!!!

Two. He is slow.

He had to search all the book stores for an encyclopedia of insults.

amdx · Feb 25, 2013

On 2/25/2013 11:52 AM, Ian Field wrote:

"amdx" <amdx@knologynotthis.net> wrote in message
news:80172$512abd3e$18ec6dd7$28579@KNOLOGY.NET...
On 2/24/2013 5:32 PM, krw@attt.bizz wrote:
On Sun, 24 Feb 2013 22:26:53 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:lc3li8hfgv23loqja17l97vtr3bt9egp59@4ax.com...
On Mon, 11 Feb 2013 18:07:23 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:1t7hh8dr4ulo3sphli5o9689cu31cbgu7o@4ax.com...
On Sun, 10 Feb 2013 21:31:46 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:cd1gh89pfiuc5glc6jv7ec6622mbmuodv2@4ax.com...
On Sun, 10 Feb 2013 13:27:28 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

Stop feeding Ian a way to have a podium.

---
Why should I attract my prey according to your vagaries?

Well at least you're leaving someone else alone!

---
No one else is as deserving of ridicule as you.

FFS - do you ever stop whining!

---
An attack is hardly whining, and an interrogative sentence should be
terminated with an eroteme.

It took you a whole week to think up a reply!!!!!!!

Two. He is slow.

You all will be happy to know that my alert system has been installed
and working *flawlessly for about two weeks. I have not seen any
misses with the infrared sensor unit and the walkie talkie has all the
range I need for my walks around the marina.

* I did have another alert on a bird, but I'll take it.

If your driveway sensor is a PIR - allegedly even large moths can set
them off.

How about this? My sensor points towards a part off a 2' x 3'
Aluminum plate, (part of a drain cover) I have people in a position
where I think they are out of the PIR site area, but they still cause an
alarm. Is a reflection possible off of the aluminum that wouls trigger a
PIR. This particular situation does not always happen, I have not pinned
it down as to sun position or temperature.
Or am I just wrong about where I think my PIR points?

Mikek

Michael A. Terrell · Feb 25, 2013

amdx wrote:

How about this? My sensor points towards a part off a 2' x 3'
Aluminum plate, (part of a drain cover) I have people in a position
where I think they are out of the PIR site area, but they still cause an
alarm. Is a reflection possible off of the aluminum that wouls trigger a
PIR. This particular situation does not always happen, I have not pinned
it down as to sun position or temperature.
Or am I just wrong about where I think my PIR points?

How are they aimed? The center isn't the hot spot, you have to be
angled away so you can cause an imbalance in the two sensors. How wide
(in degrees) is your sensor?

amdx · Feb 25, 2013

On 2/25/2013 4:01 PM, Michael A. Terrell wrote:

amdx wrote:

How about this? My sensor points towards a part off a 2' x 3'
Aluminum plate, (part of a drain cover) I have people in a position
where I think they are out of the PIR site area, but they still cause an
alarm. Is a reflection possible off of the aluminum that wouls trigger a
PIR. This particular situation does not always happen, I have not pinned
it down as to sun position or temperature.
Or am I just wrong about where I think my PIR points?

How are they aimed? The center isn't the hot spot, you have to be
angled away so you can cause an imbalance in the two sensors. How wide
(in degrees) is your sensor?

I have the PIR site area limited by looking through a ~3/4" hole.
So I really can't tell you how wide the site area is. If it wasn't
raining I could do some testing and figure out the angle it sees.
But, I still wonder can IR reflect of a piece of aluminum?
That seems to happen on occasion.
Mikek

Michael A. Terrell · Feb 26, 2013

amdx wrote:

On 2/25/2013 4:01 PM, Michael A. Terrell wrote:

amdx wrote:

How about this? My sensor points towards a part off a 2' x 3'
Aluminum plate, (part of a drain cover) I have people in a position
where I think they are out of the PIR site area, but they still cause an
alarm. Is a reflection possible off of the aluminum that wouls trigger a
PIR. This particular situation does not always happen, I have not pinned
it down as to sun position or temperature.
Or am I just wrong about where I think my PIR points?

How are they aimed? The center isn't the hot spot, you have to be
angled away so you can cause an imbalance in the two sensors. How wide
(in degrees) is your sensor?

I have the PIR site area limited by looking through a ~3/4" hole.
So I really can't tell you how wide the site area is. If it wasn't
raining I could do some testing and figure out the angle it sees.
But, I still wonder can IR reflect of a piece of aluminum?
That seems to happen on occasion.

Yes, it can, and that is why you need to be very careful to get the
maximum sensitivity where you need it. If it is outdoors, clouds
passing over can drive it nuts. Sometimes it's better to mount it where
it points down across the area you are interested in. Another way is a
video camera and motion sensing software. It is difficult to use PIR or
ultrasonic sensors in places with unstable environments. Another choice
would be a microwave motion sensor which are fairly immune to these
problems..

amdx · Feb 26, 2013

On 2/25/2013 7:01 PM, Michael A. Terrell wrote:

amdx wrote:

On 2/25/2013 4:01 PM, Michael A. Terrell wrote:

amdx wrote:

How about this? My sensor points towards a part off a 2' x 3'
Aluminum plate, (part of a drain cover) I have people in a position
where I think they are out of the PIR site area, but they still cause an
alarm. Is a reflection possible off of the aluminum that wouls trigger a
PIR. This particular situation does not always happen, I have not pinned
it down as to sun position or temperature.
Or am I just wrong about where I think my PIR points?

How are they aimed? The center isn't the hot spot, you have to be
angled away so you can cause an imbalance in the two sensors. How wide
(in degrees) is your sensor?

I have the PIR site area limited by looking through a ~3/4" hole.
So I really can't tell you how wide the site area is. If it wasn't
raining I could do some testing and figure out the angle it sees.
But, I still wonder can IR reflect of a piece of aluminum?
That seems to happen on occasion.

Yes, it can, and that is why you need to be very careful to get the
maximum sensitivity where you need it. If it is outdoors, clouds
passing over can drive it nuts. Sometimes it's better to mount it where
it points down across the area you are interested in. Another way is a
video camera and motion sensing software. It is difficult to use PIR or
ultrasonic sensors in places with unstable environments. Another choice
would be a microwave motion sensor which are fairly immune to these
problems..

Ya, I limited it's area severely, I mounted it under a wide step so it

points at a concrete wall at an angle. The IR hits at about 4 feet away
to about 9 feet. The false alarms are not really a problem, sense it
triggered when the customer walked down the step, I'm outside waiting on
them while they move around and possibly retriggering the alarm.
The rain stopped so I did a short experiment and I don't think the IR
is hitting the aluminum panel.

So know I wonder can IR reflect off a concrete wall.

I haven't been able to cause a false trigger, but I know it has
happened, always seems to be when I have two or more people in the area.
It's a very minor annoyance, I'm just curious about the cause of the
problem.

I recently received a few of these PIR sensors,

http://www.mpja.com/PIR-Motion-Detector-Module-Mini/productinfo/19517%20SC/

I little testing and I could get my own answers.
Mikek

Stretch 0.5sec pulse to 6sec

John Fields

Guest

Jim Thompson

Guest

John Fields

Guest

amdx

Guest

John Fields

Guest

John Fields

Guest

John Fields

Guest

Ian Field

Guest

Ian Field

Guest

John Fields

Guest

John Fields

Guest

Ian Field

Guest

Ian Field

Guest

Ian Field

Guest

Ian Field

Guest

amdx

Guest

Michael A. Terrell

Guest

amdx

Guest

Michael A. Terrell

Guest

amdx

Guest

Log in

Welcome to EDABoard.com

Sponsor