555 simple electronic massager circuit diagram

The circuit is composed of a 555 oscillator and a power amplifier driver stage as shown in the figure.

555 and R1, R2, RP1, C1, etc. form a multivibrator. Its frequency can be adjusted through RP1, that is, f=1.44/(R1+R2+RP1) C1. The frequency range given by the parameters in the figure is 2~106Hz .

The low-frequency pulse output by 555 is inverted and added to the input end of IC 2 through VT1, and is driven by power amplification to pulse transformer T. Its secondary CZ socket is connected to the metal plate electrode of the massager to massage or care for the strained parts of the human body. The LED emits indicator light in synchronization with the oscillation frequency. RP1 is used to adjust the frequency, RP2 adjusts the massage intensity; SA uses a spiral potentiometer with a switch.

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