سلام دوستان عزیز
این فرستنده fm چند ویژگی داره :
1 تغییر باند فرکانسی فقط با تغییر مقدار سیم پیچ از 100 تا 430 مگاهرتز!!
2 اندازه فوق العاده کوچیک
3 ولتاژ کاری 3 ولت
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این هم توضیحات زبان اصلی برای تنظیمات بهتر
این فرستنده fm چند ویژگی داره :
1 تغییر باند فرکانسی فقط با تغییر مقدار سیم پیچ از 100 تا 430 مگاهرتز!!
2 اندازه فوق العاده کوچیک
3 ولتاژ کاری 3 ولت
[hide]
[/hide]
این هم توضیحات زبان اصلی برای تنظیمات بهتر
L1-4,5-5,5 vit wire 0.4-0.5 mm to 4 mm mandrel
All the elements-SMD, resistors and capacitors, size 0805 (except for the electrolyte)
Supply voltage-3c
Current consumption of 2, 5 mA
CR2032 lithium battery lasts for 6-8 hours of work
This scheme when the nominal frequency control elements (L1, C6, C7, C5) can operate over a wide frequency range. When specified in the scheme denominations frequency is about 100 MHz. With C5 = 2.2 pF, C6 = 6.8 pF, C7 = 18 pF, L1-2, 5 vit wire 0.4-0.5 mm mandrel 2mm frequency is 430 MHz.
Like that tune, I do not know! This scheme is collected several times in different variants showed good repeatability, launched the first time. Had only compression-stretching turns set the desired frequency. The signal is clean, without the "sticks" in the range of a good acoustic sensitivity.
Range (on a good receiver) to a range of 100 MHz-50-100m, 430-MHz 150-200m.
Antenna 70cm and 19 cm for the 100 MHz and 430 MHz, respectively.
The printed circuit board is made on a bilateral glass fiber thickness of 1.5 mm. Foil on the back side is connected to the "ground" by jumpers inserted into holes in the circuit board (the more, the better). To reduce the impact of foreign objects on the frequency of the signal elements mounted strongly recommend closing shield height of 4-6 mm.
All the elements-SMD, resistors and capacitors, size 0805 (except for the electrolyte)
Supply voltage-3c
Current consumption of 2, 5 mA
CR2032 lithium battery lasts for 6-8 hours of work
This scheme when the nominal frequency control elements (L1, C6, C7, C5) can operate over a wide frequency range. When specified in the scheme denominations frequency is about 100 MHz. With C5 = 2.2 pF, C6 = 6.8 pF, C7 = 18 pF, L1-2, 5 vit wire 0.4-0.5 mm mandrel 2mm frequency is 430 MHz.
Like that tune, I do not know! This scheme is collected several times in different variants showed good repeatability, launched the first time. Had only compression-stretching turns set the desired frequency. The signal is clean, without the "sticks" in the range of a good acoustic sensitivity.
Range (on a good receiver) to a range of 100 MHz-50-100m, 430-MHz 150-200m.
Antenna 70cm and 19 cm for the 100 MHz and 430 MHz, respectively.
The printed circuit board is made on a bilateral glass fiber thickness of 1.5 mm. Foil on the back side is connected to the "ground" by jumpers inserted into holes in the circuit board (the more, the better). To reduce the impact of foreign objects on the frequency of the signal elements mounted strongly recommend closing shield height of 4-6 mm.
