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  1. Cantplaypiano

    MOSFET as switch

    I have some 7-segment LED displays which require ~9 volts to run. I want to control them using a TTL digital logic circuit which works perfectly on it's own when 5-volt displays are used. I need a way to power the 9 V displays from 5 V logic via a BCD-to-7seg decoder chip. I anticipate having to...

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