555 Timer IC Pin Diagram, Modes, Circuit, Working, Datasheet
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555 Timer IC Pin Diagram, Modes, Circuit, Working, Datasheet
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TLC551 IC Timer - CMOS 555 with 1V to 15V power, up to 1.8MHz [TLC551CP] : ID 5222 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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555 Timer Tutorial - How To Configure a 555 Timer IC