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Powering JY-MCU HC06 Bluetooth adapter from the digital pin of an Arduino ??

neilk

I'm doing a lot of experiments with Arduino, Android and a JY-MCU HC06 Bluetooth adapter.


I'm becoming increasingly frustrated by the frequent need to reset the HC06, before it will accept a connection from the Android device. The easiest way to reset the HC06 is to briefly disconnect the +5V supply.

 

According to a spec of the HC06, which I found via Google, the HC06 draws 20-30mA when pairing up and 8mA in normal use. Since an Arduino Uno digital pin can supply 40 mA, wondered if I could power the HC06 from a digital pin, allowing me to reset the HC06 via software control of the digital pin.

 

Please can anyone offer any help or advice in this area?

 

Many thanks


Neil

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  • 0

    The digital pins were not meant to supply 5V power. So you set high in code to "turn on" bluetooth?

    This is the point where I began calling on the collective knowledge of the internet. FollowTHIS Instructable. With a few changes, it is what I did. For the voltage divider I used a 2.2k Ohm and a 1k Ohm + 100 Ohm resistor. It worked fine. I checked it with the volt meter and it came out to about 3.1v.HERE is the voltage divider calculator I used. Be sure you use that on the Bluetooth Rx/ Arduino Tx side or else you could fry your Bluetooth module. The ATmega 2560 will accept 3.3v so the Arduino Rx is fine by itself (sort of. I wouldn't put this on anything too important, but worst you will get false data). Someday I'll get a real logic level converter. For convenience, I used the Serial1 pins on my Arduino Mega 2560.

     

    I see by this, the voltage should be around 3.3V not 5V. Also the TTL logic is also 3.3V. This may be the reason for the frequent resets from over driving the voltage on the IC.

     

    Just my two cents worth,

    Clem

  • 0 in reply to clem57

    Thanks Clem

     

    Yes my idea is to set the pin high in code to turn on the HC06 and could then set the pin low and then high again to reset it.

     

    I had seen the post you snipped in, but didn't find it helpful because my board  has VCC Power: 3.6-6V quite clearly printed on it and I already have a resistive voltage divider on the BluetoothRx/ArduinoTx side.

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  • 0 in reply to clem57

    Thanks Clem

     

    Yes my idea is to set the pin high in code to turn on the HC06 and could then set the pin low and then high again to reset it.

     

    I had seen the post you snipped in, but didn't find it helpful because my board  has VCC Power: 3.6-6V quite clearly printed on it and I already have a resistive voltage divider on the BluetoothRx/ArduinoTx side.

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