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precision avatar precision commented on May 3, 2024

Ack, I'm sorry about that. Totally right, I somehow missed the -a, fixed #ac56ce7b53226c5225d86ff9335a8d6a6e8cf149

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precision avatar precision commented on May 3, 2024

You should be able to restore the defaults with a 'usermod -a -G sudo, dialout,video pi'

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pettib avatar pettib commented on May 3, 2024

Thanks for clarifying. :-)
Can you tell me witch MOSFets you are using to control the Ledstrip from gpio.
I tried with 30N06L but they are built to work with 5v logic so they wont work. Need to find some that work nice with 3.3v logic.

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thatch avatar thatch commented on May 3, 2024

Hi pettib, I'm the board designer. It has DNM3023L (SOT-23 ~6A N-Channel) on it, but it depends on how much current draw your strip needs. precision's strip draws about 300mA, so this is much more than we need. I also went surface-mount to keep things small. These are about 38 cents each from digikey.

Did you try your 30N06L though? Since you're only driving say 1A, given the V_GS_th of 1.0 to 2.5V I think it's possible that it will work on 3.3 without overheating. Note Figure 3 in the datasheet and extrapolate another curve the same distance to the top-left. I suspect the y-intercept will only be about 40 or 50 mOhm.

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