Analog device Vitafon. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Analog device Vitafon. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Electronics in medicine

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This design was created after analyzing the scheme of Vlad Pomelov radioam.nm.ru/schemes.html and some study of the proprietary device:

Analog device Vitafon

This is a conventional generator that produces a range of frequencies from 60 Hz to 12,5 kHz, assembled on conventional TTL microcircuits. This design could be assembled on both analog elements and PIC controllers, but I simply used parts that had been lying in my desk for a long time without any movement.

A signal with a frequency of 50 kHz from the generator D1 goes to the divider D3 and from it a 25 kHz meander goes to counters D5, D6 and a 16 kHz meander to D7, D8. From the outputs of the counters, the signals go to the inputs of the multiplexer D10. The multiplexer switches its channels according to the signals from the counter D9. The signal with a frequency of 12 Hz from the generator D2 goes to D4.

Here, 155IE8 is used as a divider by 64, since it is difficult to obtain a stable generation of 0,2 Hz. At first I used ZP-3 as a radiator, but then I installed a TK-67 telephone capsule and the radiation power increased greatly despite the loss of radiation energy in the high frequency region. I removed the top cover from the primer and secured the membrane with electrical tape around the edges.

The device is used in our family and really helps against boils, colds, back pain, etc.

Chip-output frequency Hz
D5-3 12500
2 6000
6 3000
7 1500
D6-3 800
2 400
6 200
7 100
D7-12 8000
9 4000
8 2000
11 1000
D8-12 500
9 250
8 120
11 60

Author: Alexander Zhavoronkov, alexander@skylark.omsk.su; Publication: vitafon.ru

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