Flash circuit diagram with 555 circuit as the core

A low-frequency oscillation circuit made using a 555 time base circuit can form an interesting flashing light-emitting circuit. When the flash circuit with the 555 circuit as the core is working normally, the light-emitting diodes VD1 and VD2 will alternately flash in turn. The circuit principle is briefly described as follows: the time base circuit NE555 and R1, R2, and C1 form a low-frequency oscillator. After the circuit starts to oscillate, the potential of pin 3 of the time base circuit 555 changes continuously. When pin 3 is at high level, VD1 loses power and does not emit light, and VD2 is powered on and emits light; when pin 3 is at low level, VD1 is powered on and emits light, and VD2 loses power. Not glowing. Therefore, the two LEDs will flash and glow in turn. During specific production, the two light-emitting diodes are selected from red, green or yellow, and the difference can be more eye-catching.