Activate PIR xmtr

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Suggestions please.

Taking a driveway PIR xmtr to modify for other purposes with no actual  
internal mods.

Thinking of using some emitter taped to the PIR window to activate the xmtr.

Something as simple as a blinking LED to keep the xmtr transmitting  
while the LED is blinking.

Using one of these.
   4VWIN Wireless Home Security Driveway Alarm
  
https://www.amazon.com/4VWIN-Wireless-Security-Driveway-Receiver/dp/B01JRASCDU/ref=sr_1_129?ie=UTF8&qid15%37407005&sr=8-129&keywords=garage+door+monitor

or
   Harbor Freight Home Security Driveway Alarm
     https://www.harborfreight.com/wireless-security-alert-system-62447.html

Suggestions please.
Switch State
    Open - LED off and no PIR activation
    Closed - LED blinks to maintain PIR activation.

Option 1:
    blinking LED and switch and battery.

Option 2:
    555 timer, LED, switch and battery.

Or ???

What is needed to activate the PIR.  LED color or type ?

Receiver will just be the reeiver's flashing LED with the audio function  
disabled.
I think it is a transducer that I can either smother or cut out of the  
circuit if it is not part of the receiver function.

What do you think?

Activate PIR xmtr
You parachute in here with an unknown nym and keep asking for help with this super-sketchy-sounding project.  Alarm bells go off all round--IED, booby trap, legitimate application, or what?  

Plausible details about your project and yourself, please--otherwise no help from me, for one.

Cheers

Phil Hobbs  

Re: Activate PIR xmtr
On Sun, 23 Sep 2018 13:41:23 -0700, pcdhobbs wrote:

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It's a sad state of affairs we have today with this 'presumption of ill-
intent' on the part of group towards outsiders seeking help. It never  
used to be this way. :(




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Re: Activate PIR xmtr
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If he were asking for advice on a crystal set, a MCU, or a TIA, there would be no such issue.  

If he were more forthcoming about himself and his application, even a motion-detector might pass muster. But as things are, no way, oh-jay.  

Cheers

Phil Hobbs

Re: Activate PIR xmtr
On Wed, 26 Sep 2018 08:52:32 -0400, Neon John wrote:

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It's not!

This suspiciousness has gone too far for my liking. Nat West refused to  
open a bank account for me cos they think I'm a money lauderer; likewise  
two German banks before that. The tax people keep asking for evidence of  
this and evidence of that and clearly have me down as a tax-dodger. And  
only today because I wanted to buy 2 packets of paracetamol I had to be  
grilled by the pharmacist as to why I wanted the second packet! World's  
gone mad. You know what it is: we haven't had a major war in decades and  
everyone has lost their sense of perspective and proportion. :(




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Re: Activate PIR xmtr
On Sunday, 23 September 2018 22:05:07 UTC+1, Cursitor Doom  wrote:
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,


I don't presume guilt. I don't presume innocence either. Reality is there a
re people building IEDs and more that want to. I want no part of enabling t
hem to do it. FWIW this comes across more like a crude way to defeat securi
ty systems, which might be for similar purposes, or regular crime or organi
sed crime. Either way the OP can forget it.

There are a veritable bunch of red flags in the OP. I hope it's just some k
id with too much time on their hands, but it could just as well be somethin
g else entirely.

There is also law against providing dual use technology to foreign countrie
s, and while some here might not be aware of it I don't think the authoriti
es would in any way take kindly to providing people with info enabling them
 to kill. I wouldn't help even if the name & project sounded plausible, tho
se prove nothing.


NT

Re: Activate PIR xmtr
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changing thermal infrared  
small 100 ohm resistor fed by 1Hz 5V square wave

--  
     ?

Re: Activate PIR xmtr
When looking for the LED, what description do I look for ?
I have never seen anything called a thermal LED.
DigiKey have them.  Their on-line catalog is impossible to find anything  
especially LEDs.
Any part number for me ?

I am trying to build a garage door monitor.
My new garage door opener does not have a lock function like my previous  
so I need a way to monitor the door state in my house,

The driveway monitor is almost all I need and if I had a schematic I  
could modify it internally.  Looking at the circuit board does not give  
enough info.



Jasen Betts wrote:
 >> Suggestions please.
 >>
 >> Taking a driveway PIR xmtr to modify for other purposes with no actual
 >> internal mods.
 >
 >
 >> What is needed to activate the PIR.  LED color or type ?
 >
 > changing thermal infrared
 > small 100 ohm resistor fed by 1Hz 5V square wave
 >




Jasen Betts wrote:
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Re: Activate PIR xmtr
On 24/09/2018 9:07 AM, OGER wrote:
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You could pick off a signal from the down limit switch to drive a  
transmitter or direct wire to a led inside the home or whatever.

Re: Activate PIR xmtr
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you need a heat emitter, not a light emitter, use a small heat source, like
a small lamp or a resistor

an LM555 powered by 5V blinking a 0.3W 6V lamp would probably do the trick

digikey part number CM756-ND is a 14V lamp but using lower voltage
will make it last longer and produce more infrared than a 5V lamp

Wire the 555 discharge and output pins in parallel, this lamp is
borderline max load for a 555 so combining the two outputs will help..

                             ----+-----------------+--  +5V
                    1Meg         |                 |
                   +-[R1]--------|--------+--(@)---+                                
                   |             |        |                                
                   |    +--------+        |  lamp                                    
                   |    |        |        |                                
                   |    | . . . .|. . . . |                                
                   |    | .   VCC(8)    . |    
                   |    | .             . |
                   |    +--RES(4) OUT(3)--+
                   |      .    LM555    . |                              
                   +-------TH(6)  DIS(7)--+
                   |      .             .                                
                   +-------TR(2)   CV(5)-----+                                
               1uF |      .             .    |                              
                 =====    .   GND(1)    .    |                              
                   |      . . . .|. . . .  ===== 100nf                              
                   |             |           |                            
                   +-------------+           |
                         |           |
                 +-----------+
                                 |                                        
                              ---+-- 0V                                      
                                                                        

       run frequency is about 1.4Hz
        



--  

Bye.
   Jasen



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Re: Activate PIR xmtr

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I must be missing something. Why do you need the PIR to achieve that
objective?

In my burglar alarm wiring loop I included an improvised microswitch
toggled by the state of the garage door.

Terry, East Grinstead, UK

Re: Activate PIR xmtr
Because it is there !
The least mod to the driveway monitor is desired.
That way if in the future the PIR xmtr fails I can simply replace it or  
the receiver if it fails.

So making the PIR detect something and activating the transmitter so the  
receiver will flash as it normally would.



Terry Pinnell wrote:
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Re: Activate PIR xmtr

<snip>

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I'm obviously missing something. Why do you need the PIR to achieve
that?

In my burglar alarm wiring loop I included an improvised microswitch
mechanically toggled by the state of the garage door.

Terry, East Grinstead, UK

Re: Activate PIR xmtr
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AIUI it's because the PIR has the radio transmitter and there no wire
to hook into.


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--  
     ?

Re: Activate PIR xmtr

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I'm assuming, perhaps wrongly, that the useful options for "door state"
must be either Fully or partially Open   OR    Closed? A microswitch
fixed carefully at the Closed position would therefore determine one of
those two states.

Or is there perhaps another state, Closed and Locked, that must be
determined?

Terry, East Grinstead, UK


Re: Activate PIR xmtr


Active Passive? PIRs don't transmit.



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--  

John Larkin         Highland Technology, Inc

lunatic fringe electronics  


Re: Activate PIR xmtr
On 9/23/2018 2:11 PM, OGER wrote:
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The why did you post that you needed a schematic?

Re: Activate PIR xmtr
On Wednesday, 26 September 2018 14:41:13 UTC+1, John S  wrote:
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none of it adds up. He just wants to know how to render security PIRs unusable.  


NT

Re: Activate PIR xmtr

Obviuosly so I could see if I could remove the PIR detector and  
substitute a mercury switch for garage door tilt up.

Modify the receiver to eliminate the sounder and substitute brighter  
LEDs for the three that currently are part of the design.

John S wrote:
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Re: Activate PIR xmtr
On 9/27/2018 1:34 PM, OGER wrote:
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That was never mentioned until now. How could it be obvious? I'm  
thinking you are a troll.

*plonk*

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