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  1. #1
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    powering a mini pump using a GPIO pin

    hi everyone. My raspberry GPIO pin generate 3v 40ma and i am wondring if i can use a booster step up to power up a mini pump (12v 0.5a) using the GPIO pin with this booster step up without using the relay and a new outside power source ? if its impossible can anybody tell me if there is a way to power my mini pump with the GPIO pin without using an other power outside source ?

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  2. #2
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    Re: powering a mini pump using a GPIO pin

    No, it can't be done.

    Power is what matters. Using the formula Watts = Volts x Amps, the GPIO can produce at most 3V at 0.04A = 0.12W
    Your pump needs 12V at 0.5A = 6W.

    Additionally, the GPIO pin voltage will be slightly lower than 3V at full 40mA load and the booster will not be 100% efficient (think of about 75% as a ball park figure) so you actually need even more power than 6W to run the pump.

    You can still use the GPIO to control the pump but not to power it directly.

    Brian.
    PLEASE - no friends requests or private emails, I simply don't have time to reply to them all.
    It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.


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