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Need circuit for one or two IR led illuminator

Discussion in 'General Electronics Discussion' started by mrel, Aug 29, 2020.

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  1. mrel

    mrel

    109
    0
    Jul 2, 2008
    Hi

    Older outdoor security camera use ring style IR Led for infrared illuminator night vision.

    Attach is pictures of ring style infrared illuminator.

    More newer outdoor camera use one or two Ir led plus one photocell to turn on the IR led for night vision.

    Look on google can not find any circuit using one or to two Ir led plus one photocell using 12 volt.

    Anyone need help find circuit for one or two ir led plus photocell to use on outdoor camera using 12 volt.

    mrel IMG_20200829_025427.jpg IMG_20200829_035230.jpg
     
  2. AnalogKid

    AnalogKid

    2,515
    718
    Jun 10, 2015
    Datasheet for the LED's?
    Datasheet for the photocell?

    This can be done with two transistors, or one opamp plus a driver transistor, or one logic gate plus a driver transistor. Which approach best fits your available parts and your skill set?

    ak
     
  3. mrel

    mrel

    109
    0
    Jul 2, 2008
    Where would i find parts list and schematic to hookup parts.
    mrel
     
  4. AnalogKid

    AnalogKid

    2,515
    718
    Jun 10, 2015
    The schematic and parts list depend on the characteristics of the LEDs being powered and the characteristics of the photocell. Have you selected these parts yet?

    ak
     
  5. mrel

    mrel

    109
    0
    Jul 2, 2008
    Analog kid
    Have not select any parts ,because have no schematic and parts list.
    I post this thread so maybe someone can point to website that have schematic and parts list for two ir leds with photocell circuit.
    This ir led is to be use on security camera for night vision.
    mrel
     
  6. mrel

    mrel

    109
    0
    Jul 2, 2008
    Hi Analog kid
    See attach picture.
    This picture is ptz camera has two ir led and one photocell.
    That circuit got burn out, so the ir led don't work anymore.
    I need circuit to put two ir led and photocell in spot where burn out ir led and photocell is locate,

    mrel

    IMG_20200901_031637.jpg
     
    Last edited by a moderator: Sep 2, 2020
  7. Harald Kapp

    Harald Kapp Moderator Moderator

    11,662
    2,697
    Nov 17, 2011
    What's wrong with the photocell that is already present?
    upload_2020-9-2_9-20-54.png

    Simple circuits for a dark activated LED can be found on the internet by the dozen, e.g. this very simple one. Using a power transistor (e.g. a darlington from this selection table) you can easily drive the ring of IR LEDs or equivalently a pair of high power IR-LEDs.
     
  8. mrel

    mrel

    109
    0
    Jul 2, 2008
    You ask What's wrong with the photocell that is already present.
    The picture i post has 40 pcs of infrared emitters ,need circuit that has only two infrared emitters for the camera picture i post.
    The picture of the camera i post has two infrared emitters ,the circuit on that camera burnout.
    So need circuit that contain two infrared emitters and photocell to turn on infrared the emitter at night.
    mrel
     
  9. Sunnysky

    Sunnysky

    488
    126
    Jul 15, 2016
    Without datasheets or partial schematic of Before and addon, with available power source or some Measureable specs on desired changes, I have no idea what you want
     
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