Radio control range 433 Mhz

A simple receiver control signals airborne feli first transmitter model rockets. It used distribution of stranjonnyj receiving radio 433 Mhz range.

In [1] and [2] describes the device registration strirujushhie mod New Delhi flight options. To monitor their status led is used of improvementsto indie mirrored tonal links on (around 1000 Hz), NE redavaemymi via airborne feli PTP 433 Mhz range for science. Upon completion of flight this transmitter serves as a beacon for search system described in [3]. When this device jomnoe system has designed antenna and line-in gain-jomno tract that would be molded by listening to define the direction of the signal source is prizemlivshuju SJ model rockets.

The use of radio is very convenient for remote control the status of missiles at the start. However, as described in [3] the receiver proved to be not very suitable due to Gro mozdkosti design. Suggest a simpler receiver, is th only to listen to the radio signal rockets exactly on the starting position, from her removal. In these circumstances, no antenna Tre requires focus, its role can be played by Chet long wires cut one quarter wavelength. Monitor the level of Whitefish NALA at launch rockets is not necessary, therefore the receiver contains a qualifier which eliminates his changes.

Figure. 1

Receiver circuit is shown in Figure 1. 1. U1 — the same receiving range 433 Mhz Duhl mod XY-MK-5V, as in [3]. But there the output signal with an intermediate point was filmed receiving Trak TA, where his level is proportional to the amplitude of the input RF signal. In RAS smatrivaemoj design module used without refinement. The output signal is removed from the DATA output fashion la (two such conclusions, they ravnoprav), where it has a high logic level if the input RF signal amplitude and low enough in his absence. When receiving amplitude-shift keyed signal re sensor output signal rocket has the appearance of pulses of constant amplitude, following with the frequency manipulation.

Power output signal fashion la is enough for letting his head using a cus stereote phone market connected to connector X 3. When shown on a diagram connecting the left and right slots contacts those telephones are connected by therefore, which increases the resistance of the load with the Nations exit module U1.

Capacitor C1 allows only the variable component of the output signal, and a permanent component of the delay. Variable resistor R1 provides volume control, combined power switch SA1. If you are using headphones with integrated volume control, AC resistor R1 in jomnike can be eliminated by connecting the upper (schema) contact connector XS directly with sub-zero obklad coy capacitor C1.

Battery GB1 — three galvanic cells AAA type common voltage 4.5 in.

Приёмник собран в корпусе из от­резка пластикового электромонтажного короба 40×25 мм длиной 140 мм. Ан­тенной служит отрезок монтажного про­вода длиной 170 мм. Печатная плата для устройства не разрабатывалась, все де­тали размещены на фрагменте макетной платы размерами 45×30 мм. Перемен­ный резистор R1 с выключателем взят из неисправных компьютерных головных телефонов. Напротив разъёма Х3 и регу­лятора громкости в стенке короба сде­ланы отверстия нужного размера. В короб удачно вписался стандартный держатель для трёх гальванических элементов типоразмера ААА. Внешний вид конструкции показан на рис. 2.

Fig. 2

Чтобы пользоваться приёмником, достаточно подключить к нему головные телефоны, включить питание и поло­жить приёмник в карман. Его габариты позволяют это сделать. Включив радио­оборудование модели ракеты, можно свободно перемещаться по стартовой площадке и вблизи неё, всегда зная о состоянии ракеты. Поскольку чувстви­тельность приёмника невелика, даль­ность приёма не превышает 20…30 м, чего вполне достаточно для задач, для которых он предназначен. Тем не менее однажды этот приёмник помог мне най­ти ракету, зарывшуюся в снег при при­землении.

LITERATURE

1. Pakhomov a. Barograph for model rockets. — Radio, 2017, no. 1, pp. 52-54.
2. Pakhomov a. electronic unit for MOE New Delhi. — Radio, 2017, N? p. 54-56.
3. Pakhomov a. Finder to suit model rockets. — Radio, 2016, no. 10, pp. 50-52.

Author: A. PAHOMOV, Vladimir