555 Timer IC Pin Diagram, Modes, Circuit, Working, Datasheet
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
555 Timer Monostable Circuit Diagram
Introducing 555 Timer IC - Tutorial | Random Nerd Tutorials