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EEEEE IC kit 161 pcs, 20 Models Chip Assortment Set Analog Integrated Circuits Electronics Parts Opamp Pack, 555 Timer Components, Op Amp, Oscillator, Pwm, IC Plier Included UA741 LM358 and More.: Amazon.com:
HiLetgo 5pcs NE555 Pulse Frequency Square Wave Rectangular Wave Signal Generator Signal Generator Module Stepper Motor Driver DC 5V-15V Powered: Amazon.com: Industrial & Scientific
Amazon.com: Juried Engineering NE555P NE555 555 Single Precision Timer Breadboard-Friendly IC DIP-8 (Pack of 5) : Industrial & Scientific
Amazon.com: Juried Engineering NE555P NE555 555 Single Precision Timer Breadboard-Friendly IC DIP-8 (Pack of 5) : Industrial & Scientific