Published:2011-5-11 4:20:00 Author:Ecco | Keyword: electronic physical therapy device | From:SeekIC
Physical therapy device circuit diagram is shown as the chart. The complementary type square-wave generator is composed of transistor VT1, VT2, and space multiplier is boosted by transformer T, then output by at a and b ports by BP2. H stands for NH - 416 type neon bulb. When the circuitry works, it will shine, indicate working status. RP1 is a type of frequency adjust potentiometer which can adjust the oscillation frequency, and we can see it from the shine of H. RP2 is a type of output strength adjust potentiometer(with switch). T could use output transformer in common transistor radios, the original 8 Ω terminal connects connentor VT2. VT1 requires that β≥100, and VT2 requires β≥50. It needs a pair of pars of multimeter when using it, and one connects to port a of the machine, and the other one connects to port b. When paients have a headache, they could handle a par, and the other one connects to temple or frontal headache site, then open the power supply. Firstly, RP1 is put in the middle position, and make and gradually increase of RP2 until the skin contact par has the sense of acupuncture or movement. The strength of first physical shoulds not be too strong. It can be make paients feel good by adjusting PR1 to change the frequency. General physical therapy should be proper in 2 ~ 5 minutes, headache instantly disappears. If invalid, it need to be changed the frequency and appropriately increase strength, if we physiotherapy 5 minutes again, still have a headache, we will not have to try, and that explains this physical therapy device is not suitable for you.
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