555 intermittent ozone generator circuit diagram

The ozone generating circuit is shown in the figure, which includes a low-voltage power supply circuit, an ultra-low frequency pulse oscillation circuit, a high-frequency multivibrator, a high-frequency pulse excitation stage, etc. IC 2 (555) and R1, R2, D1, D2, RP1, C3, etc. form a low-frequency multivibrator, whose oscillation frequency is f=1.44/(R1+R2+RP1)C3.

The oscillation frequency of the parameters shown in the figure is about 0.025Hz, that is, the oscillation period is about 40 seconds. Adjusting RP1 can change the duty cycle of the oscillation pulse. If the duty cycle is set to 1:1, the positive and negative level durations are about 20 seconds each. During the duration of the positive pulse, the subsequent stage IC3 is powered to work; during the low level period, IC3 is forced to reset and does not work, that is, it provides working power to IC3 intermittently. IC3 (555) and R5, R6, C5, etc. form a controllable multivibrator with an oscillation frequency of f=1.44/(R5+2R6)C5.

The parameters shown in the figure work around 30kHz. Since the voltage at pin 4 of the forced reset terminal of IC3 is controlled by the output level of IC2, when the pulse is low level (less than 0.5V), IC3 is forced to reset and does not oscillate. Therefore, by adjusting RP1, the pulse duty cycle of IC2 can be adjusted, thereby changing the pulse oscillation time of IC 3 to adjust the time of ozone generation, thereby achieving the purpose of changing the ozone concentration in the air.

The driving power tube can be TIP42, 3 CD 10B, etc.