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Humidifier power button bypass

Discussion in 'Power Electronics' started by C137, Aug 18, 2018.

  1. C137

    C137

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    0
    Aug 18, 2018
    Hi there. These are the insides of a humidifier. It has a touch sensitive button up front. The unit turns off after desired humidity is reached, but I need it to stay on. What can I do to keep it on all the time?

    thank you
     

    Attached Files:

  2. dave9

    dave9

    809
    188
    Mar 5, 2017
    Your pictures were inadequate to determine how the circuit is set up so the answer is setting it to a lower humidity level than it would reach.

    However the generic answer is bypass the sensing subcircuit so the compressor/fan/etc always gets power.
     
  3. Externet

    Externet

    710
    145
    Aug 24, 2009
    Try shorting or disconnecting the humidity sensor that tells it the humidity preset has been reached.
     
  4. dave9

    dave9

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    188
    Mar 5, 2017
    Heh, I wrote compressor because I somehow read humidifier but thought dehumidifier. If you link to the product it might help, but might be a matter of just putting jumper wire between power input and the motor. Include a switch on the wire if you'd like to turn that feature off.
     
  5. C137

    C137

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    Aug 18, 2018
    I can get better pictures if needed. The 'humidity sensor' is a separate device, it delivers power to the humidifier, which should always be "on". How can I bypass that switch?
    blues-crane-humidifiers-ee-5951-64_1000.jpg
     
  6. C137

    C137

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    Aug 18, 2018
    Hope these pictures help, thank you all for your replies!
     

    Attached Files:

  7. dave9

    dave9

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    188
    Mar 5, 2017
    Like any switch you'd just jumper wire around it. Measure power to the motor or piezo component, whatever is driving the moisture, and compare to the portion of the circuit where that power is produced and jumper around the detection subcircuit.
     
  8. C137

    C137

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    0
    Aug 18, 2018
    damn I am not good with electronics. Fried two of those things last week. There is a fan and the atomizer, so its not that simple..
     
  9. dave9

    dave9

    809
    188
    Mar 5, 2017
    You need one of those robots with live streaming video and remote control arm movements over the internet (RCAMIPWTFBBQ) so I can disassemble and probe it remotely.

    Kidding aside, we can probably figure this out if your pictures were more intuitive, for example a picture of the unit then successive pics as it's being disassembled, but as far as what I have to go on, I would measure for voltage on the red wire plugged into the "CNI ColorLED", the red wire on the 4 pin connector next to it, and the red wire on the connector towards the other side of the board.

    I would set the unit up to run and be measuring which of those 3 have power while running, and which of those 3 cease having power when it stops, and jumper between one of those to the one that stops having power when it stops running.

    There is something missing though, I don't see a transformer (or a battery bay) and seeing it on Amazon it supposedly runs off 120VAC. You seem to have withheld vital information for some mysterious reason and left the topic dragging out.

    We need the robot!
     
  10. dave9

    dave9

    809
    188
    Mar 5, 2017
    Keep something in mind. All you really need to do is put a piece of tape over the humidity sensor, when the humidity is low of course. :D

    If the sensor has cracks/gaps/seams in the casing then you might need to seal those too with tape/epoxy/wax/hot glue/bubblegum/etc.
     
  11. C137

    C137

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    0
    Aug 18, 2018
    Thanks dave, I will order one of those robots to make it easy on us :)
    Meanwhile I will take any picture you desire. I am just scared cause I fried two of those things last week trying to get the "humidity sensor" to work. So yes, it is powered by a 110v/ 24volt adapter which is plugged into the humidity sensor ( a separate unit -WILLHI WH1436H), the power circuit sits across the power/0ff/on circuit and you can clearly see four wires coming out of it ( white, black red and green)
     
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