Multivibrator circuit composed of ne555

The function of the 555 timer is mainly determined by the two internal comparators A1 and A2. The output voltages of the two comparators control the state of the RS flip-flop and the discharge tube. Add a voltage between the power supply and ground. When pin 5 is left floating, the voltage at the non-inverting input terminal of voltage comparator A1 is 2VCC /3, and the voltage at the inverting input terminal of A2 is VCC /3. When forming a multivibrator, it is generally It can be left open or connected to a 0.01 microfarad capacitor to ground. As shown below.