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Argha Chakraborty
Argha Chakraborty
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I want to build an Arduino Project to control a DC load(DC 5V water pump ampere rating is not known) and using a transistor with PWM to control speed. There is a need to shrink down the project and I have chosen Digistump ATTiny85. But read that Digistump board can't source enough current in the transistor to turn it on. An extensive search reveals people suggesting to use a logic level MOSFET instead for the purpose.

Even Digistump sells a MOSFET shield which has a logic level MOSFET(fqp30n06lFQP30N06L). But this part is unavailable in nearby stores.

I am trying to read the datasheet of other available MOSFET(stp90n03lSTP90NF03l) and understand whether it would suffice my purpose. What should I look for in the datasheet?

Digital IO pins in Digistump outputs 3.3V-5V. So the voltage threshold for the MOSFET to turn on would be less than 3.3V line(~2.5V say) so that I may test it with both my Arduino and Digistump board.

I want to build an Arduino Project to control a DC load(DC 5V water pump ampere rating is not known) and using a transistor with PWM to control speed. There is a need to shrink down the project and I have chosen Digistump ATTiny85. But read that Digistump board can't source enough current in the transistor to turn it on. An extensive search reveals people suggesting to use a logic level MOSFET instead for the purpose.

Even Digistump sells a MOSFET shield which has a logic level MOSFET(fqp30n06l). But this part is unavailable in nearby stores.

I am trying to read the datasheet of other available MOSFET(stp90n03l) and understand whether it would suffice my purpose. What should I look for in the datasheet?

Digital IO pins in Digistump outputs 3.3V-5V. So the voltage threshold for the MOSFET to turn on would be less than 3.3V line(~2.5V say) so that I may test it with both my Arduino and Digistump board.

I want to build an Arduino Project to control a DC load(DC 5V water pump ampere rating is not known) and using a transistor with PWM to control speed. There is a need to shrink down the project and I have chosen Digistump ATTiny85. But read that Digistump board can't source enough current in the transistor to turn it on. An extensive search reveals people suggesting to use a logic level MOSFET instead for the purpose.

Even Digistump sells a MOSFET shield which has a logic level MOSFET(FQP30N06L). But this part is unavailable in nearby stores.

I am trying to read the datasheet of other available MOSFET(STP90NF03l) and understand whether it would suffice my purpose. What should I look for in the datasheet?

Digital IO pins in Digistump outputs 3.3V-5V. So the voltage threshold for the MOSFET to turn on would be less than 3.3V line(~2.5V say) so that I may test it with both my Arduino and Digistump board.

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Argha Chakraborty
Argha Chakraborty
  • 43
  • 7

Understanding gate threshold voltage of logic level mosfets from datasheet

I want to build an Arduino Project to control a DC load(DC 5V water pump ampere rating is not known) and using a transistor with PWM to control speed. There is a need to shrink down the project and I have chosen Digistump ATTiny85. But read that Digistump board can't source enough current in the transistor to turn it on. An extensive search reveals people suggesting to use a logic level MOSFET instead for the purpose.

Even Digistump sells a MOSFET shield which has a logic level MOSFET(fqp30n06l). But this part is unavailable in nearby stores.

I am trying to read the datasheet of other available MOSFET(stp90n03l) and understand whether it would suffice my purpose. What should I look for in the datasheet?

Digital IO pins in Digistump outputs 3.3V-5V. So the voltage threshold for the MOSFET to turn on would be less than 3.3V line(~2.5V say) so that I may test it with both my Arduino and Digistump board.