Microcomputer low frequency electrotherapy instrument circuit diagram

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Microcomputer low-frequency electrotherapy instrument circuit diagram Microcomputer low-frequency electrotherapy instrument schematic, micro-computer low-frequency therapy instrument low-frequency pulse current mainly has three physiological and therapeutic effects: 1, excitatory neuromuscular tissue 2, promote local blood circulation 3, analgesia these three important roles. In recent years, many low frequency therapeutic devices have appeared on the market. The circuit can output a variety of simulated human hand massage techniques, adjustable intensity, and a variety of modes to choose from. All kinds of components are common components on the market, and the inductance is a common color ring inductance. The output is preferably a patch dedicated to the treatment device. As shown in the figure, the chip adopts the EMC78P156 of ELAN, and the power supply can be powered by three batteries. Working principle: In the circuit, the P5.0 and P5.1 ports of EM78P156 are used to control the waveform change, P5.2 is used to drive the boost of the boost circuit, and P5.3 is the signal for receiving the output-free automatic stop circuit. .P6.0 to P6.3 to automatically enter the SLEEP state are used for key detection, and P6.4 to P6.7 are used for mode display. The circuit is divided into four parts. The control circuit consists of a button, a single chip, and an indicator light. Press the corresponding button, the corresponding function output, the indicator light is on, the mode is adjustable, and the indicator is used to display the current mode when used in multiple modes. of. The strength is adjustable, and the general output intensity is suitable for tolerance, and should not be too strong. Second, the booster circuit outputs a square wave of a certain pulse width and frequency at the P5.2 port, which is used to make Q1 in a switching state, and the power supply passes through a boost circuit composed of L1, Q1, D1, and C1, at both ends of the capacitor C1. A voltage several times higher than the power supply is generated. Instead of always outputting the signal, let it keep boosting, just boost the voltage before the output, and stop the output, the boost circuit stops. If you want to strengthen the intensity, just widen the output signal time, for example, the first gear, the signal output 1MS, the second gear output 2MS, which second gear is much stronger than the first gear strength, it is recommended that the intensity change does not Too big, a little stronger, otherwise, the human body will be unbearable. Third, when the waveform control and output circuit output, let the boost circuit work, boost, and then, P5.0, P5.1 output separately, (note, the two ports can not be output at the same time), the output P5.0 and P5 The waveform of the .1 output is the same, except that the phases are 180 degrees out of phase. In this way, you can get the same feeling on the output side of the two outputs. There is no such thing as one port has a feeling and the other port has no feeling. In these two ports, you can control the on/off of this output circuit and the voltage of the above booster circuit to simulate various massage techniques. You can also refer to the modulation intermediate frequency, dense wave, thinning wave, and inter-literal on the Physiotherapy. Waves such as waves produce therapeutic functions such as analgesia and weight loss. Fourth, no output automatic stop circuit This circuit is in the case of no load output, no current flows through D3, D4, there is no voltage drop on it, Q6 has no base voltage, is in the off state, P53 port gets high level, when High time exceeds 5 seconds, indicating no load, automatic stop. If there is load, there is current flowing, D3, D4, Q6 have base voltage, in conduction state, P53 port gets low level, indicating load . The basic principle of the low-frequency therapy device is first mentioned here. Next time, we will discuss the program flow and the human body's perception of different waveforms. What kind of waveforms have therapeutic effects on the human body.