IR Blaster Operating Voltage

Discussion in 'Electronics Resources' started by Scott Burns, Apr 10, 2015.

  1. Scott Burns

    Thread Starter New Member

    Apr 9, 2015
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    Pictured below is an IR Emitter (Blaster) with a standard 3.5mm connector. Can anybody tell me the input voltage of this component? I can't find this information anywhere. Thank you in advance.


    upload_2015-4-10_13-32-11.jpeg
     
  2. GopherT

    AAC Fanatic!

    Nov 23, 2012
    5,992
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    Open it up to see if it is a bare IR emitter or if there is a current limiting resistor. Generally, IR emitters that look like 5mm indicator LEDs are rated for 20 mA to 100 mA so keep it less. Anything else you know about this - is it normally connected to audio jack or how is it used?
     
  3. Scott Burns

    Thread Starter New Member

    Apr 9, 2015
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    I can't open it. I haven't bought it yet.

    An IR blaster lets a PC or smart phone send out infrared signals, basically letting it act like a remote control. You use it to let the PC/smart phone control a cable box, satellite receiver, or something like that.
     
  4. Papabravo

    Expert

    Feb 24, 2006
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    OK. If it is used by a PC, which has +5, +12, and -12, then depending on the current limiting resistor in series with the IR emitter any voltage at all could be used form 2.8 Volts up to say 12.0 volts. A negative voltage would be possible but improbable. You could always buy one and measure the voltage. That would be the quickest way to find an answer. Where would you be plugging it into the PC?
     
  5. Scott Burns

    Thread Starter New Member

    Apr 9, 2015
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    Actually, I don't want to plug it into anything. I want to remove the 3.5mm plug and connect it directly to a 3.3 volt power source. That's why I need to know the input voltage.
     
  6. Papabravo

    Expert

    Feb 24, 2006
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    They must intend for you to plug it in somewhere, and you can't possibly know that unless you can get the manufacturer to tell you, or you open it up and reverse engineer it. What is stopping from doing either of those things? I'd order two and plan on destroying one.
     
  7. Scott Burns

    Thread Starter New Member

    Apr 9, 2015
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    I haven't been able to get the information from any manufacturers. That's why I asked the question here.
     
  8. Papabravo

    Expert

    Feb 24, 2006
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    I don't know what you expect from us and I'm sorry you can't get the answer you're looking for. It's not like there is an obvious answer for your question.
     
  9. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Can you post a link to the item? Does it have any code number to identify it?
     
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