2 diodki podłaczone do portu COM

Witam, czy przeszło by to by zrobić sobie taka niby lampke podłanczając LED do portu COM w komputerze. Jeśli tak to dysponuje ktos jakimś schematem i programeme do włanczania i wyłąnczanie takiej "lampki" ?

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Krzysztof. B.
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