Using the 555 Timer IC in Special or Unusual Circuits | Nuts & Volts Magazine
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555 TIMER PROJECTS: Great Collection of DIY Projects Using 555 Timer IC eBook : PATHAN, MAJID: Amazon.co.uk: Books
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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