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Imi construiesc niste fotocelule (bariere infrarosu). Deocamdata am emitorul de o parte si receptorul de cealalta, dar as vrea sa le pun de aceeasi parte, si sa folosesc o oglinda pentru reflectarea razei. Am vazut la cineva ca folosea o catadioptrie pentru lucrul asta, alinierea facandu-se mult mai usor in acest caz. Aveti idee de unde as putea cumpara niste catadioptrii?

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