The illustrated LED flash unit can serve as an attractive decoration for flower pots, fish tanks, or even toys. It is based on a standard astable multivibrator circuit, which allows the LEDs to flash continuously without any external trigger. When the third pin (pin 3) of the 555 timer is high, LED2 lights up while LED1 remains off. Conversely, when pin 3 is low, LED1 turns on and LED2 goes out. This creates a rhythmic flashing effect between the two LEDs. By adjusting the W potentiometer, you can easily modify the flashing frequency, giving you control over how fast or slow the LEDs blink. The voltage at pin 3 fluctuates between 0V and 6V, depending on the timing components connected to the circuit. This simple yet effective design is perfect for beginners looking to explore the basics of electronics and LED circuits. Whether you're building a fun project or just learning about oscillators, this circuit offers a great hands-on experience. Cixi Xinke Electronic Technology Co., Ltd. , https://www.cxxinke.com