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Boost 5V (4.7v) to 9V

tim687

I've got a 5V (4.7v) powerbank, and I need 9V to run my Arduino and the dc motors.

 

I couldn't find any circuit online.

 

Can somebody help me?

 

 

Thanks in advance,

 

Tim

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  • Tim

    John is quite right.

     

    There is one thing to consider though.

    You haven't specified what the ratings are for the 9v motors.

     

    All motors will tend to draw twice the running current when starting, and this spike on the voltage line can cause the Arduino to reset.

     

    You may wish to consider separating the motor voltage (9v) from the 5v for the Arduino.

    I'd also add a large capacitor to the 9v side, and fit 0.1uF caps across the motor.

     

    Mark

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  • Tim

    John is quite right.

     

    There is one thing to consider though.

    You haven't specified what the ratings are for the 9v motors.

     

    All motors will tend to draw twice the running current when starting, and this spike on the voltage line can cause the Arduino to reset.

     

    You may wish to consider separating the motor voltage (9v) from the 5v for the Arduino.

    I'd also add a large capacitor to the 9v side, and fit 0.1uF caps across the motor.

     

    Mark

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