Post by thread:[OT]:Infra RED light

Just a quick question. I have a cctv camera recording the house, but in near darkness the picture isnt very good, The camera's big sister had a ring of Infra red emitters attached around the lense, there didnt appear to be a focusing lense around the led's If i got a series of Infra red emiitiers and devised a circuit to fit around the lense would this help the viewing at night of the camera. The camera is a bullet type Komco camera aprox 3cm x10 long. Thanks in advance Paul Tyrer Kind Regards, Best Wishes. Paul Tyrer. Mob 07779956086 http://www.paultyrer.com/ -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Infra-red torches are quite commonly sold as accessories for low-light viewing. Quite easy to make for yourself, or you can buy a kit from an electronic store. Make a bank of 16, 25, however many you want, IR LEDs, perhaps drive it with pulses for better range. Jaycar, for example, have one in their catalogue http://www.jaycar.com.au Click on Our Catalogue, Video Surveillance, Product Code AA0290 for the IR torch or QC3468 to see a small b/w cammera with IR illumination Try a Google search for +"IR illuminator" +circuit - plenty of hits for suppliers/kits, maybe a free circuit or two in there =============================================== I've only had need to record at night once. It was the great Which Neighbourhood Cat Is Peeing On The Stove In The Middle Of The Night Mystery. Solved with a webcam, a couple of IR LEDs and an 8-hour tape -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

AFAIK, black and white CCD sensors have an IR filter in front of it, but I do not know how difficult is to remove it. Francisco Paul Tyrer wrote: {Quote hidden}>Just a quick question. >I have a cctv camera recording the house, but in near darkness the picture >isnt very good, The camera's big sister had a ring of Infra red emitters >attached around the lense, there didnt appear to be a focusing lense >around the led's >If i got a series of Infra red emiitiers and devised a circuit to fit >around the lense would this help the viewing at night of the camera. The >camera is a bullet type Komco camera aprox 3cm x10 long. >Thanks in advance >Paul Tyrer > > > >Kind Regards, Best Wishes. > > >Paul Tyrer. >Mob 07779956086 >http://www.paultyrer.com/ > >-- >http://www.piclist.com hint: The list server can filter out subtopics >(like ads or off topics) for you. See http://www.piclist.com/#topics > > > > > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

If you need ir led's check ebay I just got 160 new for $9.00 cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1727321586 he may have more That's what I was planning to do with them. I have an ir filter made to replace the glass in a flashlight but the ir comes out in a very narrow beam making it very hard to tell what your looking at. Jim {Original Message removed}

On Thu, 23 May 2002, Jim wrote: > That's what I was planning to do with them. I have an ir filter made > to replace the glass in a flashlight but the ir comes out in a very narrow > beam making it very hard to tell what your looking at. So point some of the LEDs off center, spread the beam out some... Dale -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

"you are" => "your" now? IIRC it used to be "you're". Jim (Sorry - but THIS one really gets to me ...) > On Thu, 23 May 2002, Jim wrote: > > > That's what I was planning to do with them. I have an ir filter made > > to replace the glass in a flashlight but the ir comes out in a very narrow > > beam making it very hard to tell what your looking at. > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

I'm thinkin ur rite -----Original Message----- From: Jim <spam_OUTjvpollTakeThisOuTDALLAS.NET> To: .....PICLISTKILLspam@spam@MITVMA.MIT.EDU <PICLISTKILLspamMITVMA.MIT.EDU> Date: Thursday, May 23, 2002 4:43 PM Subject: Re: [OT]:Infra RED light {Quote hidden}>"you are" => "your" now? > >IIRC it used to be "you're". > >Jim > >(Sorry - but THIS one really gets to me ...) > > >> On Thu, 23 May 2002, Jim wrote: >> >> > That's what I was planning to do with them. I have an ir filter made >> > to replace the glass in a flashlight but the ir comes out in a very >narrow >> > beam making it very hard to tell what your looking at. >> > >-- >http://www.piclist.com hint: The list server can filter out subtopics >(like ads or off topics) for you. See http://www.piclist.com/#topics > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

On Thu, 23 May 2002, Jim wrote: >If you need ir led's check ebay I just got 160 new for $9.00 >cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1727321586 >he may have more >That's what I was planning to do with them. I have an ir filter made >to replace the glass in a flashlight but the ir comes out in a very narrow >beam making it very hard to tell what your looking at. >Jim Use a divergent lens. Peter -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

Yes, make a string of IRED leds and connect them to +12V through a resistor. Do not expect this to replace proper lighting. Peter On Fri, 24 May 2002, Paul Tyrer wrote: {Quote hidden}>Just a quick question. >I have a cctv camera recording the house, but in near darkness the picture >isnt very good, The camera's big sister had a ring of Infra red emitters >attached around the lense, there didnt appear to be a focusing lense >around the led's >If i got a series of Infra red emiitiers and devised a circuit to fit >around the lense would this help the viewing at night of the camera. The >camera is a bullet type Komco camera aprox 3cm x10 long. >Thanks in advance >Paul Tyrer > > > >Kind Regards, Best Wishes. > > >Paul Tyrer. >Mob 07779956086 >http://www.paultyrer.com/ > >-- >http://www.piclist.com hint: The list server can filter out subtopics >(like ads or off topics) for you. See http://www.piclist.com/#topics > > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

On Thu, 23 May 2002, Francisco Ares wrote: >AFAIK, black and white CCD sensors have an IR filter in front of it, but >I do not know how difficult is to remove it. No, color ones have one. B/W usually don't unless they are high end. Peter -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

>No, color ones have one. B/W usually don't unless they are high end. There was an item on a TV cop show here recently where a surveillance camera had been put in a room, and on the monitor you could see the TV remote IR led being operated by the "baddie". This would seem to bear this out, as I would doubt they removed an IR filter for the program. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

On Fri, 24 May 2002, Alan B. Pearce wrote: >>No, color ones have one. B/W usually don't unless they are high end. > >There was an item on a TV cop show here recently where a surveillance camera >had been put in a room, and on the monitor you could see the TV remote IR >led being operated by the "baddie". This would seem to bear this out, as I >would doubt they removed an IR filter for the program. 'Standard' testing of non-pulsed IR sources such as small lasers and IR optocoupler alignment in equipment involves a CCTV camera and a monitor. Any other way is a waste of time (I am not talking about tiny reflective or transmissive off the shelf sensors). The cheapest CCD and CMOS cameras work great for this. Peter -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

Most cameras made today use sensors that are HIGHLY sensitive to infrared, and in fact have infrared blocking filters installed to compensate. You can try adding IR LEDs to illuminate the scene, it will improve the performance somewhat, however the best solution (it you are willing to deal with the false colours produced during daytime) is opening the camera and removing the IR filter. I have done this to quite a few cameras and the result is stunning. A completely dark room is almost as bright as day when you use an IR remote (with only ONE LED) as a flashlight. It is quite remarkable. TTYL > {Original Message removed}

LOL -----Original Message----- From: michael brown <.....n5qmgKILLspam.....AMSAT.ORG> To: EraseMEPICLISTspam_OUTTakeThisOuTMITVMA.MIT.EDU <PICLISTspam_OUTMITVMA.MIT.EDU> Date: Friday, May 24, 2002 5:11 AM Subject: Re: [OT]:Infra RED light >> I'm thinkin ur rite > >I think that would be u'r. ;-) > >-- >http://www.piclist.com hint: The PICList is archived three different >ways. See http://www.piclist.com/#archives for details. > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.