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somebody help me !

Discussion in 'General Electronics Chat' started by marlzz, Aug 26, 2017.

  1. marlzz

    marlzz New Member

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    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. Pommie

    Pommie Well-Known Member Most Helpful Member

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    That is a very complex chip. The question you ask suggests you're fairly new to electronics. Maybe you should start with a simpler module such as the HC-05 or HC-06. Apologies if I'm telling Granny how to suck eggs.

    Mike.
     
  3. marlzz

    marlzz New Member

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    no, 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 ? :'(
     
  4. dave

    Dave New Member

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  5. be80be

    be80be Well-Known Member

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    Resistors not going to work. And i think you need read the data sheet
    You can run it from the arduino supply It's made to use Lithium-ion battery it has it's own regulators.

     
  6. marlzz

    marlzz New Member

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    So you're saying that I can connect Tx and Rx from module to arduino but I power the Module separately using batteries ? this module is an old bluetooth headphones that comes with li-ion batteries. OR from the arduino power supply (3.3v) to the battery input of the module?[​IMG] please see this --->> https://ibb.co/bS3gRk
     
  7. be80be

    be80be Well-Known Member

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    You have to hook up the ground to the arduino if you use the battery
     
  8. marlzz

    marlzz New Member

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    there are 2 grounds from the module, the negative from the battery and the GND mark of the module which of the two should i connect ? or should i connect both ?
     
  9. marlzz

    marlzz New Member

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    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
     

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