Time Delay Relay Module Trigger Cycle Timming Circuit Switch LCD USB Board 5V
6,68 €
Nano Sheild. Relay module delay power off and trigger delay cycle timing circuit switch. P7: Signal hold function: The signal is maintained, the timing is cleared, and the relay conduction; when the signal disappears, the relay disconnects after the timing OP; during the timing, there is another signal and the timing is cleared;.
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