3Pcs Pulse Square Wave NE555 Frequency Duty Cycle Adjustable Module Signal bq
3,08 €
3Pcs Square Wave NE555 Duty Cycle Adjustable Module Frequency Pulse Signal. Main chip: NE555;. Generate adjustable pulse for MCU. Output with LED indication (low level,LED will on; high level, LED will off; low frequency, the LED flashes);.
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