Signal Generator Ne555 Duty Cycle Adjustable Module Frequency Square Wave Puls

Signal Generator Ne555 Duty Cycle Adjustable Module Frequency Square Wave Puls. Main chip: NE555;. 1 x NE555 Duty Cycle and Frequency Adjustable Module Square Wave Rectangular Wave. Output with LED indication (low level ,LED will on; high level, LED will off; low frequency, the LED flashes);.. Condition:： New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is applicable). If the item comes direct from a manufacturer, it may be delivered in non-retail packaging, such as a plain or unprinted box or plastic bag. See the seller's listing for full details. See all condition definitions ： Brand: ： Unbranded/Generic ， EAN: ： Does not apply： MPN: ： Does not apply ， Amount: ： 1PCS： UPC: ： Does not apply ， 。