Author Topic: MOSFETs instead of relays?  (Read 2019 times)

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Offline TrumpkinTopic starter

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MOSFETs instead of relays?
« on: February 10, 2009, 10:32:12 AM »
In the "Build Your Own Butler Robot" tutorial couldn't you use Power MOSFETs instead of relays? It seems like MOSFETs would be a lot smaller and cheaper than relays.
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Offline MaltiK

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Re: MOSFETs instead of relays?
« Reply #1 on: February 10, 2009, 02:26:10 PM »
MOSFETS capable of driving the motors he used were, as he mentioned, beyond his budget.

Also I dont know if you can connect MOSFETS directly to the output of the phidgets like what he did with the relays, I am not sure but I think you need a middleman, an MCU.
« Last Edit: February 10, 2009, 02:38:47 PM by MaltiK »
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Offline TrumpkinTopic starter

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Re: MOSFETs instead of relays?
« Reply #2 on: February 10, 2009, 02:37:59 PM »
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Offline MaltiK

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Re: MOSFETs instead of relays?
« Reply #3 on: February 10, 2009, 02:41:25 PM »
I always found it wierd that due to the small size of MOSFETs, it would be really hard for me atleast, to accept the fact that they can power motors with as high a current stall as 25amps...
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