Medical coil on PIC-controller (12V)

2017-11-20

Medical coil on PIC-controller . The brightest representative of the different variations of the is a version of the PIC controller. It covers about 80% of all the healing frequencies [1,2], allows you to select, configure, and maintain 0 individual treatment programs. The complexity of its manufacture is not much higher than that , and the possibility of orders of magnitude more. This version of the coil has a frequency accuracy of modulation is not more than 0.04% over the entire operating range — from 0 to 0 Hz, and is determined by a quartz resonator. The step size is 0 Hz in the range 0-10 Hz, 0 Hz, in the range of 0-100 Hz and 0 Hz in the range 0-1250 Hz. And in increments of 0 Hz it is possible to obtain the maximum possible modulation frequency of 0 kHz. The circuit is powered from any power supply with 12V voltage and consumes only 0 watts of power. . The heart of this version of the coil is the DD0 microcontroller — . Despite its small external dimensions and relatively low cost, it has fairly broad capabilities: generates a frequency in the range 0-10000 Hz, controls the generator field coil on VT0 sound signal and 0-digit display . Thus it has low power consumption quartz frequency stabilization and non-volatile memory. The control scheme of only three buttons — SA0-SA0 . Work schemes are well documented in previous versions of , the difference between this — only modulation control: here she is using a microcontroller. . Details. The following is a list used in the unit circuits, diodes and two modes. In parentheses are possible replacements:

DD0 —
DA0 —
VT0 —
HG0 — on 74HC555
BA0 — Active voltage is 5V
ZQ0 — 20MHz
VD0, VD0 —
HL0, HL0 — any led voltage is 3V and the power below 1W
SA0-SA0 — any push-buttons
L0 — on 220мкГн, calculated for a current below 0 A
XS0 — any for Your adapter to 12V

. All capacitors circuits — ceramic or polypropylene, with a nominal value of deviation of no more than 5%. Any low power resistors with a nominal deviation of not more than 20%. The coil itself is wound in any of the ways suggested or . . The file for the firmware of the microcontroller can . About how it is stitched, read the article: "". User management to the coil, see . . Constructive. For coil Assembly will fit a small plastic box: with a window under an indicator or with . Box of metal — not suitable! The scheme is simple, so her details can be placed on the breadboard. The transistor VT0 must be installed on a small heatsink. Some of the Assembly steps shown in the following photo:.

Setting. If the circuit is assembled correctly and the microcontroller stitched, the entire coil starts working immediately without configuring. The only thing that you need to adjust the current from the power source. It is adjusted by trimming resistor R0 should be about 100mA at the maximum frequency on the display. .

Production version: PCB (open)

The production option provides a set of documentation for manufacturing a printed circuit board in production: GERBER file for PCB, BOM file of the specification of components and a schematic diagram showing the values of the elements. All this allows you to immediately order a PCB, for example, here, and then quickly assemble it.

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