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Discussion in 'General Electronics Discussion' started by marlou rentucan, Aug 27, 2017.

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  1. marlou rentucan

    marlou rentucan

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    Aug 27, 2017
    Guys anyone please help me. I am doing with a project that connects a bluetooth module to the arduino UNO r3 but my bluetooth module can only accept 1.8v (Integrate 3V, 1.8V LDO and Switching mode regulator) (http://www.datasheetspdf.com/PDF/IS1685S/938444/7) datasheet for my bluetooth module. and my arduino has only 5v out and 3.3v output. how can i "safely connect" these wires so that i will not damage my components ? i have a lot of resistors here but i dont know what to use. please help me. here are some pictures (https://ibb.co/jA3HXQ) (https://ibb.co/nnrAmk)
     
  2. Bluejets

    Bluejets

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    Oct 5, 2014
    Data sheet link comes up as noise reduction headset.
     
  3. marlou rentucan

    marlou rentucan

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    Aug 27, 2017
    so this is not a bluetooth module ?
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Check your links to make sure you have provided us with the correct datasheet.
     
  5. marlou rentucan

    marlou rentucan

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    Aug 27, 2017
    it is the correct datasheet. but my problem is how to step down the 3.3v from arduino to 1.8v so it can satisfy the label on the chip which says 1.8v. My friend told me to use tmp36 regulator but I don't have those components. I only have resistors (a lot of em). Maybe these resistors can help me step down the voltage ? What can i do ? :'(
     
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    OK, the first think you need to do is to locate the datasheet for the bluetooth adapter.
     
    Terry01 likes this.
  7. BobK

    BobK

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    Jan 5, 2010
    I am assuming the module uses this chip.

    You are misreading it. The supply voltage for the chip is listed at 4.3V max. It is intended to be powered by a lithium Ion battery and even has the charging circuitry for it built in.

    Bob
     
    [email protected] and JWHassler like this.
  8. marlou rentucan

    marlou rentucan

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    Aug 27, 2017
    UPDATE ! now i bought HC-05 bluetooth module because you guys technically preferred to it. but anyways since I already have one, how am I gonna "safely" connect this to my arduino? like i said i have a lot of resistors (complete like 3 cabinets full of resistors). I don't know anything about this module please help me. I hope my resistors this time could help. ------> https://www.elabpeers.com/bc417-bluetooth-to-serial-arduino.html (matched on my module). Here is a picture ---> https://ibb.co/hc4peF https://ibb.co/gy1D6v

    THANK YOU SO MUCH GUYS FOR THE PREVIOUS REPLIES :D APPRECIATED SO MUCH
     
  9. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Google for "Arduino hc05"

    There are plenty of tutorials. You don't need any resistors.
     
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