2PCS NE555 Adjustable Square Wave Module Pulse Frequency LM358 Duty Cycle
1,99 €
The main chip: LM358. 2 PCS Square Wave NE555 Pulse Module LM358 Duty Cycle Frequency Adjustable Module. The board has four the shorting cap can select the frequency. Inserted 0 short-circuit cap, the longest cycle upwards to 0.3 s.
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