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On-board STM32F105RCT6 chips
They're everywhere and they're a lot of fun
1x Component Storage Box Plastic Adjustable Makeup Medicine Organizer
000-count screen
555 Timer Ic Ne555 Lm555 Timer Ic DC 5V On-board STM32F105RCT6 chipsThe 555 is a highly stable device for generating accurate time delays or oscillation. Additional terminals are provided for triggering or resetting if desired. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For astable operation as an oscillator, the free running frequency and duty cycle are accurately controlled with two external resistors and one capacitor. The circuit may be triggered