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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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  • Thanks for your answers!

     

    The motors don't run from the 5V connection from the Arduino ;-)

     

    But no capacitor is there for the motors. I'll try to add them.

     

    Btw, the motors sort of run at 5V, but I might still be buying the step up module soon!

     

    Thanks!

     

    Tim

  • in reply to tim687

    It is probably not a good idea to run the motors from the Arduino 5 volt power. Motors usually take more current than the Arduino  can supply. Also it will be a good idea to put a diode across the motor to protect the rest of your circuit from Inductive spikes. Check out "Flyback Diode or Freewheeling Diode". The Capacitor that Mark recommended will not help the motor run but it will help prevent the motor from resetting the Arduino. Your best approach is to use the Arduino to control a MOSFET or a Transistor and use the Transistor to control a higher voltage that is being used to drive the motors.

    John

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  • in reply to tim687

    It is probably not a good idea to run the motors from the Arduino 5 volt power. Motors usually take more current than the Arduino  can supply. Also it will be a good idea to put a diode across the motor to protect the rest of your circuit from Inductive spikes. Check out "Flyback Diode or Freewheeling Diode". The Capacitor that Mark recommended will not help the motor run but it will help prevent the motor from resetting the Arduino. Your best approach is to use the Arduino to control a MOSFET or a Transistor and use the Transistor to control a higher voltage that is being used to drive the motors.

    John

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