430 mg diet plan. Radioamator designs for sales of radio equipment. Preparation of a handmade payment

In the middle of spring, bad things began to happen with our old intercom and, having changed in the camp “before it was repaired”, I guessed about my long-standing task and put it in a new cell. I got a power supply at the link with the zim - how to transfer the image to the apartment? Pull darts - you don’t really want to. You can, obviously, buy a 1.2 or 2.4 GHz Chinese camera without a dart, but only I and those people can marvel at the signal, so they can buy devices, but don’t sell the stench of expensive cameras. You can, obviously, buy one receiver, and, according to the decision of the “subscribers”, spread the image with a cable, but in this variant, you have your own problems.

At the same time, the idea of ​​creating a low-power video transmitter fell on my mind, before that I had the opportunity to create similar outbuildings in my life. Nathnennyy idea, I became a topic on the Internet, trying to know the scheme of what is simple and universal, until I stumbled upon the site www.vrtp.ru and specifically the topic of the forum assigned to 430 MHz (channel 59). The author, under the nickname "CyLLlKA", has developed a small transmitter on a PAR-resonator. I took the HF part of this circuit as a basis, so that enough people repeated it at the forum with positive results. CyLLlKA and other lads (especially "Mikhalych2" 🙂 have done a great job for improving the induced scheme. GREAT RESPECT for them!

Video transmission scheme

The only thing I need to change in this scheme is the circuit breaker-modulator. So, as far as I know, that such power-modulators are more “capricious”, sensitive to the input support and equal to the input signal, as well as the coefficient of transistor strength. "Encyclopedia of electronic circuits" Count that Shiitsa yaku was already choosing and maw dosvіd її nalashtuvannya. Axis scho in me vyyshlo:

Scheme of experimental video transmission 430 MHz.

A small theoretical entry…

What parts and tools are needed

Video transmitter I chose SMD-components, that I should work with them, and the stench is ideal for HF devices. You can buy them in shops or solder off old boards. A good source of details is to pay for old car phones of different standards (NMT-450, GSM) Motorolla, Bosch, Siemens and others like them. The price of high-yield inductances, high-frequency transistors, quartz and other drib'yazku. Otzhe, for picking I will add you to know:

• Soldering iron with a thin tip and regulated temperature, neutral flux, solder with a thickness of 0.25 mm, soft, thin penzlik for applying the flux;
• Foil sklotekstolit zavtovshki 1 mm (0.8 mm, 0.5 mm), chloride-free for etching;
• Scalpel, tweezers, wire cutters;
• Magnifying glass (at the request);
• Dovіdnik z marking SMD-components;
• RF transistors: BFR93A, 2SC3357(56), BFG135 or analogues close to the parameters;
• LF transistors: BC847 (BCW60, other similar ones), BC327 or similar pnp, BCP56;
• SMD resistors (1206);
• SMD capacitors (0805);
• PAR resonator 420-450 MHz(0604 or in any other building);
• Enameling wire diameter 0.3-0.35 mm.;
• Substroyuvalni resistors 1 kOhm, Small;
• Stabilization of life 6V;
• Tester;
• HF receiver, radio station;
• Oscilloscope, frequency - I did not win;
• Beer, kava and sandwiches are stale with a glass of tea!

Preparation of a handmade payment

Drukovana board - the basis of any electronic add-on. I prepare payments for laser waste technology (LUT). Description of technology in the Internet. It can be said that this technology has changed the world of radio amateurs. Now, in one evening, it has become possible to make ready-made folding boards from household minds. Briefly, let's talk about the main points of technology. We can charge a fee for additional help of special programs or vector editors. I, for example, am using the Visio program (little ones pay for the Visio format). The image of the conductors on the other board is handed over to the mirror image and it is printed on a laser printer on a glossy (created) paper (magazines).

Ready to foil sklotekstolit - cleaned with fine emery paper and degreased with alcohol or acetone. On the preparation of the textolite, we impose a charge on the image of a hand-drawn payment - with a toner to a copper foil and the whole sandwich is curved with dekilkom sheets (an old newspaper 5-7 balls). I'm going to make an old book in a soft case for this process - I just put a plate with a stencil in the middle. Let's make a maximum of prasko and proglazhuyemo our "sandwich" push hard to finish! I work 2-3 times 15-20 seconds. After the first approach, it is necessary to control the position of the stencil on the foil - it is not your fault… During the procedure, the toner melts and is transferred from the surface of the paper to the mid-foil. And because of the fact that the toner does not dissolve in water, we can use this process for making boards.

After that, the fee was cooled by placing it in a container with warm water for 15 hvilin. Afterwards, when the papers are wet, and mi yogo we can gently jump with our fingers. On the board, there are more than one translation of the tracks. The board is ready before pickling. Travimo near the hot rich chlorine spray, so that the hour of etching is minimally shortened. We wash the board in running water and wash the toner with acetone - the board is ready before noon.

In principle, as a matter of fact, the majority of other boards for high-frequency circuitry can be made only by chemical methods, or by zanurennym at melting from distant "blowing" of excess solder. But if you work carefully and do not hurry, then at home you can work as well. You need a soldering iron, garny flux (neutral) and solder with a diameter of 0.25 mm. We cover the board with flux and warm up the tracks with a soldering iron tip minimal amount of solder. "Tovstiy" solder for such small boards is not a good idea. Shvidko z'yavlyayutsya excess solder on the plate. And try to tidy them up and sound to overheat that winding track.

I will ring out I prepare 2-3 pay especially as the stench is small and I strongly recommend it to you. Navit if one board is to go wrong when etched or luzhennі (such as other buvaє), then you will have a “strategic” reserve.

Attachment installation

There is nothing collapsible for mounting SMD elements. Є kіlka ways їх soldering. I sound as if I'm coming: I place the element on a drukovanu board, attaching the element with tweezers, I apply flux on the contact with a thin soft pencil. After that, I warm it up for one day, and the wines are soldered to pay for the rahunok with solder for a day. After that, if necessary, I add the element and then I solder it with thin solder.

The board was disassembled under the multi-turnover change resistors of Murat (blue), and in the process of installation, a couple of other “pidstroєchniki” were known. I had a chance to work a jumper and pay a fee.

After the installation of the elements is completed, the board is washed with a soft pencil near warm water from Fairy or similar. The result is to be blamed, as in the photograph, pointing lower or similar.

Transmission

The installation of the annex is made up of two stages. At the first stage, it is necessary to reconsider, that having ordered the RF generator and at the end I will add a “good” frequency that you are carrying. For which food is served on the emitter of the transistor BCP56 and we try to accept a carrier frequency (I won’t 433.440 MHz) to the receiver or TV set mode search channels. Sound the unmodulated frequency, which you carry, “appears” on the television as a black screen (not breeches). For nalashtuvannya I vikoristovuvav portable radio station Yaesu VX-6 - to control the carrier frequency in AM mode and in parallel with CIM, receiving the Icom IC-R3 signal in NTSC mode.

After that, I ordered the HF part, I started to adjust the modulator and applied a new signal from the DVD-programmer to the new one. Matviy marveling at cartoons, and I’ll build Luntik for a good time. In order to pick up a working point of the BC327 transistor, I had a chance to put a 1K change resistor in it and shunt it with a capacitor. After that, the modulator was installed and at the output, the add-on showed up modulated by the amplitude frequency.

Strum spodzhivaniyam pristroєm - 160-180mA. The quality of the video signal is like on the drones. Changing the resistors in the video modulator allows you to adjust it practically for all parameters (linearity, linearity and depth of modulation). Signal intensity (approximated by hvilemir, approximately 100-150 mW). On the IC-R3, the signal is received near the yard, with a long antenna, the transmission is 10 cm.

Gnativ Vasyl.

Berezen, 2009.

Micropower radio station in the range of 430 MHz.

Igor Nechaev ( U.A. 3 WIA ), m. Kursk

"Magazine" Radio No. 4; 2006"

About the development of special microcircuits TX5000 and RX5000 for the system of radio detection of home creatures, its power and basic parameters, has already been published in the Radio magazine (Nechaev I. "Radio beacon detection in the 433 MHz band", 2005 No. 8). ). The first of them is a transmitter, and the other is a receiver and is recognized for inducing radio exchange of digital data in the UHF band at a frequency of 433.92 MHz.

Digital microcircuits can be used not only for direct recognition, but also for encouraging low-power amateur transceivers with a fixed frequency in the range of 430 MHz. Removal of attachments to secure calls at small distances (hundreds of meters) and need for walks, repairs, etc.

The scheme of the proponated transiver is shown in fig. one.

The transmission part is selected on the DA1 TX5000 microcircuit, as well as the VT3 transistors (external transmission cascade) and VT5 (microphone input). For the implementation of amplitude modulation of vicoristan, the possibility of smooth regulation of the output tension of the TX5000 microcircuit. Graph of the latency of the external tension in the struma through the introduction of the 8th line of the microcircuit of indications in fig. 2.

If you want to send a signal from a microphone or a microphone microphone, you can select amplitude modulation. At the primary part of vicoristan, there is an RX5000 (D A2) microcircuit, so that we can directly strengthen and replace the ultrasonic mud filter on the surface of the acoustic winds. It is designed to see the demodulation of AM and IM signals and may have a marginal sensitivity of 1 ... 2 μV. For її increase at the input, an additional UHF was installed on a low-noise transistor VT1

On transistors VT2, VT4, the AGC pickup was selected. With an increase in the input signal on the output of the microcircuit 5, the constant voltage increases and if it reaches the value of 1.3 ... 1.5 V, the transistors VT2, VT4 turn on and the voltage on the output 3 changes. With this, the gain coefficient of the DA2 microcircuit changes and the signal from AM is detected without delay. Sensitivity of the receiver to become close to 0.4 μV; and the maximum input signal that can be received without interruption is 20...30 mV.

UZCH is selected by the DA3 microcircuit. The adjustment of the density is controlled by the resistor R17, which is taken from the vimikachem of life.

Transmit-receive jumper - SA1. With this SA1.1 contact, connect the antenna to the output of the transmission or to the input of the receiver, enter the storage of narrow lances of the receiver (C1L1C2) and transmission (C1L2C6).

To live attachments in the form of two galvanic elements with a coiled voltage of 3 or three batteries. It does not work at a voltage of 2.7 ... 4 V. The strum, which slows down the transmitting, is close to 20 mA, we take it at low voltage - close to 12 mA, with which the ultrasonic frequency is slowed down by 5 ... 6 mA

For small dimensions, I will add in a new installation in the main element for surface mounting - permanent resistors P1-12, tantalum oxidizers, oxide and ceramic K10-17v, or similar imported ones. Pobudovnі capacitors also for surface mounting, substring resistor R10 - SPZ-19, change R17 - SPZ Sv.

All coils are wound with PEV-2 0.3 wire, L1 and L2 on a mandrel with a diameter of 2 mm and 3 and 4 turns in a straight line, and coils L3, L4 - on a mandrel with a diameter of 4 mm and a 4 and 7 turns in a line. PD19 jamming switch 2 microphone - electric CZ-036 or a similar dynamic head can be played as small-sized, bagged with a support of 50 ohms. Socket XW1 - be it high-frequency small-sized, for example SMA As an antenna, you can twist the cable (without a screen) for a quarter of a day's wind.

Most of the transfer details are placed on a double-sided drukovaniy board made of foil-coated cloth with a thickness of 1 - 1.5 mm, a sketch of the indications in fig. four

(Scale 2:1). The other side is devoid of metal and is connected behind the contour at a few places with a fire wire on the first side. There is a high-frequency jack XW1 on the board.

For ease of installation of the microcircuit to її visnovkіv, solder the wires of a thin mounting rod.

The details of the receiver are located on the other board, the sketch of which is shown in fig. 3 (scale 2:1),

for the design, there is a similar transfer fee. I fold the insults and pay at once and solder along the contour, and then we install a jumper. So there is a single design, which is located at the case of a double-width expansion, a resistor R17, a dynamic head, are attached to the walls. It is also necessary to open the housing for a microphone, a dynamic head and a high-frequency plug.

The taxes are repaired from the transmission. Yogo vihіd pіdklyuchayut to vimіryuvаcha potuzhnostі or voltmeter z uzgodzhenim navantazhennyam. Resistor R10 is used to establish the highest modulation with a minimum of damping. Nalashtuvannya need to repeat the kіlka razіv. If so, you can connect the antenna and, if necessary, adjust the maximum field strength.

Let's try to catch up. Changing the inductance of the coil L1 and L4, as well as the capacitance of the capacitor C2, reach the maximum sensitivity. In the author's version, in the process of adjusting, it turned out that the capacitor C2 was installed in the position of the least capacity, because of the switching off.

For the scheme "Super-regenerative primer at 90 ... 150 MHz"

Radio receiver Over regenerative for 90 ... 150 MHz L1 - 2 turns, L2 - 4 turns of a frame with a diameter of 8 mm, PEL wire 0.8. Throttle 60 turns to the wire PEL 0.1 on resistor MLT 0.5. - use of intestinal radio receiver. Mounting on "piatachki" according to the technique of Zhutyaev. ("73 Magazine", Feb.1974, p.100)

For the circuit "Receiver on microcircuit TDA7000 (174XA42)"

Radio receiver Radio receiver on a microcircuit drukovanoї pay side by side elements Literature: 1. K174XA42 - single-chip emergency rescue. Radio N 1 1997 r.2. Single-chip emergency receiver. Radio N 2 1997 r.3. Radio receiving attachments on microcircuits K174XA42A. Radio N 5 1997

For the scheme "Super-regenerative primer at 144 MHz"

Radio receiverSuperregenerative at 144 MHzPointed lower scheme a supra-regenerative primer can be used as a warehouse part of a simple portable radio station on the 144 MHz band. Scheme dosit is simple that features can not be. The sensitivity of the receiver is approximately 10...15 µV. scheme engraved on another plate. It’s a pity, the little ones of the drukovanoї pay after її folded I didn’t save (NB). Coil L1 to sweep 3 turns with a "blank" with a diameter of 0.8 mm, without a frame - on a mandrel with a diameter of 6 mm, a winding length of 4 mm. DR1 - standard 25 μg. Dr2 - to avenge 250 turns of PEV 0.1 on a ferite ring H1000 with a diameter of 8 mm. Transformer Tr is the output of the transistor radio, if high-resistance telephones are installed, then wine is not needed. Transistors should be more saturated.

For the scheme "Experimental Detector UKKh-VHF Receivers"

Experimental detector VHF-VHF receiver Detector for the range of 100-200 MHz Scheme priymacha, induced in Fig. 1, vicor line, which is tuned in the body, soldered from midi or foil-coated sclotextolite. Coil L2 revenge 4 turns of silver dart. The internal diameter of the coil is 12 mm, the winding length is 12 mm. Vіdvedennya virobleno vіd middle. Coil L1 is vikonan at the sight of one turn over L2. Capacitor C2 made with a copper plate with a size of 25x50 mm with a Teflon gasket with a thickness of 0.125 mm. You can zastosuvat zvichayny RF reference capacitor. Primach corisny at nalashtuvanni HF equipment yak hvilemir. The radioamator UA3ZNW has been converted to a direct conversion (Fig. 2). Capacitor C2 is the side of a double-sided slab of a resonator. Triac ts112 and circuits on a new one When using a local oscillator and a ULF from V. Polyakov's book "Adoptions of direct conversion for an amateur connection" (M.DOSAAF 1981, p. two-transistor UHF on field transistors KP303! The local oscillator was selected on the walls of the resonator. At

For the scheme "UKH priymach іz emergency situations on a special micro-storage room КХА058"

For the scheme "Priymach direct conversion"

For the "Simple KB Primach" scheme

For the scheme "SIMPLE UKB FM RECEIVER"

For the scheme "Theft indicator"

The proponation of attachments is made up of a miniature UKH-transmitter, which lives in the form of a battery, that emergency radio receiver with a prefix at the apartment of the car's sergeant. A miniature transmitter (small. 1) is installed in front of the car park at night at such a place, so that you won’t see a vikradach. ES-priymach can be prepared by yourself for any given scheme, or let’s get used to it, what can the UKH range do. at the output of the emergency receiver there is no signal and the voltage on the secondary winding of the transformer T1 is daily. Transistor VT1 is open, relay K1 is on. If the machine can see a sprat of meters, the tightness of the UKH transmission becomes insufficient for the noise suppression of the receiver, which causes noise to appear. At the output of the transformer T1, the voltage changes, as it is rectified by the VD1 diode and filtered by the capacitor C8. VT1 is activated, relay K1 is activated and normally open contacts turn on the audible alarm. Yakovlev, m. Nizhnyovartovsk...

The first of them is a transmitter, and the other is a receiver, and is recognized for encouraging radio exchange of digital data in the UHF band at a frequency of 433.92 MHz.

Digital microcircuits can be used not only for direct recognition, but also for encouraging low-power amateur transceivers with a fixed frequency in the range of 430 MHz. Removal of attachments to secure calls at small distances (hundreds of meters) and need for walks, repairs, etc.

The scheme of the proponated transiver is shown in fig. 1. The transmission part is selected on the DA1 TX5000 microcircuit, as well as on the VT3 transistors (output transmission stage) and VT5 (microphone microphone). For the implementation of amplitude modulation, it is possible to smoothly regulate the output tension of the TX5000 microcircuit. Graph of the fallout of the external tightness of the struma through the visnovok 8 lines of the microcircuit of indications in fig. 2. If you apply a signal from a microphone or a microphone subwoofer to this visnovok, you can remove the amplitude modulation.

At the primary part of the vicoristan there is an RX5000 (DA2) microcircuit, so we will accept direct reinforcement and replace the ultrasonic mugo filter on the surface acoustic fibers. It is possible to see and demodulate signals AM and ІМ and may have a boundary sensitivity of 1 ... 2 μV. For її promotion at the input, an additional UHF was installed on a low-noise transistor VT1.

On transistors VT2, VT4, the AGC pickup was selected. With an increase in the input signal on the output of the microcircuit 5, the constant voltage increases and if it reaches the value of 1.3 ... 1.5 V, the transistors VT2, VT4 turn on and the voltage on the output 3 changes. With this, the gain coefficient of the DA2 microcircuit changes and the AM signal is detected without a pause. The sensitivity of the receiver should be close to 0.4 μV, and the maximum input signal, which can be received without interruption, is 20 ... 30 mV.

The node is selected on the microcircuit DA3. The regulation of the density is controlled by the resistor R17, the summation of the vimikachem of life.

Transmit-receive jumper - SA1. With this SA1.1 contact, connect the antenna to the output of the transmission or to the input of the receiver, enter the warehouse of the receiver's lanyards (C1, L1, C2) and transmission (C1, L2, C6).

To live attachments in the form of two galvanic elements with a coiled voltage of 3 or three batteries. It does not work at a voltage of 2.7 ... 4 V. The strum, which transmits delays, is close to 20 mA, we accept at a low frequency - close to 12 mA, with which UZCH, it slows down 5 ... 6 mA.

For small dimensions, I will add in a new installation in the main element for surface mounting - permanent resistors P1-12, tantalum oxidizers, oxide and ceramic K10-17v, or similar imported ones. Bud_vnichi condensers are also for surface mounting, substroyuvalny resistor R10 - SP3-19, change R17 - SP3-3v.

All coils are wound with PEV-2 0.3 wire, L1 and L2 on a mandrel with a diameter of 2 mm and 3 and 4 turns in a straight line, and coils L3, L4 - on a mandrel with a diameter of 4 mm and a 4 and 7 turns in a line. PD19-2 jamming switch, microphone - electric CZ-036 or analogous, dynamic head can be played as compact, bagged with 50 ohm support. Nest XW1 - be it high-frequency small-sized, for example, SMA. Like an antenna, you can twist a cable (without a screen) for a quarter of a long time.

Most of the transfer details are placed on a double-sided drukovaniy board made of foil-coated cloth with a thickness of 1 - 1.5 mm, a sketch of the indications in fig. 3 (scale 2:1). The other side is devoid of metal and is connected behind the contour at a few places with a fire wire on the first side. There is a high-frequency jack XW1 on the board.

For ease of installation of the microcircuit to її visnovkіv, solder the wires of a thin mounting rod.

The details of the receiver are located on the other board, the sketch of which is shown in fig. 4 (scale 2:1), the design is similar to the transfer fee. Offset payments are folded at once and soldered to the circuit, and then we install a jumper. So there is a single design, which is located at the case of a double-width expansion, a resistor R17 is attached to the walls, a dynamic head. It is also necessary to open the housing for a microphone, a dynamic head and a high-frequency plug.

The taxes are repaired from the transmission. Yogo vihіd pіdklyuchayut to vimіryuvаcha potuzhnostі or voltmeter z uzgodzhenim navantazhennyam. Changing the inductance of the coil L2 (roaming the turns) and the capacity of the capacitors C1, C2, reach the maximum output tension. Resistor R10 is used to establish the highest modulation with a minimum of damping. Nalashtuvannya need to repeat the kіlka razіv. If so, you can connect the antenna and, if necessary, adjust the maximum field strength.

Let's try to catch up. Changing the inductance of the coil L1 and L4, as well as the capacitance of the capacitor C2, reach the maximum sensitivity. In the author's version, in the process of adjusting, it turned out that the capacitor C2 was set to the minimum capacity position, which is due to switching off.

"Radio", №4, 2006 Igor NECHAYEV (UA3WIA), m. Kursk