NE555 Duty Cycle and Frequency Adjustable Square Wave Module DIY Kit
1,02 €
The main chip: NE555;. -Low-frequency stall: 1Hz ~ 50Hz. -IF stall: 50Hz ~ 1kHz. -In the high-frequency stall: 1KHz ~ 10kHz. -High-frequency stall: 10kHz ~ 200kHz. -Output with LED indication, there is no output LED quantity (low straightforward, high level LED off relatively low frequency LED flashes);.
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