8x Digitale Röhre + 8x Schlüssel + 8x Zweifarbiges LED Modul TM1638 für AVR Arduino
8,12 €
1 Channel 5V Relay Module Shield. Due to the different display and different light, the picture may not reflect the actual color of the item. In a word, it is a way of short circuit trigger between signal input and GND negative pole.
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