Negotiation attachment (intercom) from the ULF from the old TV (K174UN14). Negotiation attachment (intercom) from ULF from old TV (K174UN14) Low frequency substation on microcircuits
Chip TDA 2003 is a typical low-frequency power supply unit, which takes the power out of a unipolar power unit, it is cheap and wide-spread in the amateur radio environment. Zustrіti yogo can be majzhe at all old car radios. Vytchiznyanimi analog є microcircuit k174un14
This micro-storage allows you to choose a simple sound frequency substation, with a minimum of sound radio elements. With this scheme, the high voltage gain on the stream is up to 3.5 A and insignificant equal harmonics and crossovers. Careless robot podsilyuvacha bezpechuetsya zahisty in the form of a short zamikannya on the change that fast strum, thermal protection and switching on the voltage during a surge of voltage equal to 40 Volts.
The design is to achieve a simple sub-low frequency, the basis of which is the TDA2003 microcircuit. The input signal is sent to the microstore through an electric capacitor 10 uF. The strongest low-frequency signal from the fourth wave reaches the speaker through a capacitance of 470 microfarads. The circuit takes life from 12 volts to the life block.
The scheme on the TDA2003 chip is striking in its simplicity and superiority. Volodya has a wide range of voltages and is highly popular among the first generation of radioamators.
Regardless of the simplicity, the design can be conceived, only forgettable to install a microcircuit on the radiator.
On DA1, a stable multivibrator is used, the frequency of which can be found in the capacitance of the capacitor C3 is approximately 4 kHz in the stun mode and increases in an unwound state up to 7 kHz. At the output of the DA2 chip, the signal is identical to the signal from the output of the DA1 multivibrator, but at the prolongation phase.
If there is a low level signal at the output of the first booster, the capacity of C4 is charged through VD1 of the revitalizing level, minus the drop on VD1 diodes. If the voltage at the output DA1 becomes positive, then the output voltage will reach the vital one and charge the capacity C4, C5 through VD2 to the potential, which is higher for the voltage of life.
In this article, I’ll tell you how to choose not a foldable and small-sized audio frequency driver on a TDA2003 (ILA2003) microcircuit, an analogue of K174UN14 (I have my time in yoga in a sirnikov box). The substation of appointments for vikoristannya in any design, as the main or additional ultrasonic frequency, I vikoristav yogo as subsilyuvach for the phone, taking a column like a computer and placing subsilyuvach in it. Tsey podsiluvach may have the following parameters:
Operating frequency range…………………………………………………………………………………………20-20000 Hz.;
Maximum output pressure, (Rн = 4 Ohm, КНІ = 10%) not less than ………………….5 W.;
Life voltage range………………………………………………………………………………6…18
The scheme of the pidsiluvach is even simpler and even more nadive. May have a wide range of voltage and is practically not driven in. Maє zahist vіd navantazhennya (having changed on a short zamikannі, propratsyuvshi hvilini 3, the microcircuit heated up like an infection, but it didn’t go out of tune, or better not to experiment). When buying all the details of this ULF, you will get here for $ 2-3.
Pіdsilyuvach nalashtovuєtsya by selection of support R2 for the minimum creations at maximum density. However, I did not recommend that you apply a too large signal to the input (with an amplitude greater than 1 Volt), so that the overwhelm at the input and the far output of the microcircuit is out of tune. In principle, RxCx can not be installed, as without it there is no self-excitation of the booster at high frequencies.
The axis looks like this microcircuit:
I chose my first pidsiluvach simply by soldering all the elements between myself (trochs after poking around on the computer know yoga photo).
My first pidsiluvach at TDA2003 😀
Just don't write about what you can pick up on a different payment. At that time, I didn’t have time to take care of the cash payment, and it’s so rich swidshe :)
Tse zvichayno your right de vi yogo will vikoristovuvat, ale I rozpovim like zastosuva yogo I. Nadali pіdsilyuvach buv vіshcheny v hull dynamіk vіd vіd kom'yyuyte іz dvoma batteries mobile phone. Batteries ran out for about a year 2 listening to music in voice and in good quality, and then the trochs died, then I robbed the trochs quieter and more years 1.5 I could hear. The axis of the photo is in the analysis of what I have seen, like you stick everything together with adhesive tape, but it’s better to work (thank you for the quality of the photos)
Sound frequency substation, selection on the radian microcircuit k174un14. Chip 174un14 for factory data є podsilyuvach low frequency rated power of 4.5 watts. Por_vnyannі z k174un7 may have more good and thoughtfulness in case of overheating and overheating, in case of short flickering at the exit, and also in case of changing the polarity of the voltage of life. I know in my own pockets a microcircuit on a hust, having reverified it, it worked, and I wanted to give a look and compactness of the circuit, virushiv її reshape it for myself. We look at the scheme below:
Knowing at the merezhі druk - pіdkoriguvav in such a rank that the rozmіri came out 30x35 mm, proruyv khustka and zіbrav (), on the back, as if not worthy of a sound - zamikavsya and buv quiet. There is a 22 Ohm resistor in the circuit for the radian microcircuits - this is a clear enumeration! There maw stand 2.2 ohms! Having joked around with a resistor and know it on the 10th - having soldered it, the situation significantly improved in terms of sound.
Then it was decided to take two resistors of 1 ohm each, imported, and then install them in sequence on the host. We clean and thicken the sound of viishovs, whatever is necessary!
ULF speaker 5gd and 3gd are good. I installed the microcircuit on the old cooling radiator, on which it was out, smearing it with thermal grease between the microcircuit and the radiator. Having screwed the board and the radiator together with a self-tight screw, for reliability, now nothing is hit, and the radiator comes out mechanically from the radiator - the lining is not needed, so it’s a minus for the microcircuit of transfers to the connection with the case.
I live the ULF circuit as a pulse, with the capacitor on the board 1000 microfarads, the cycle is running, the voltage is 12.5 volts. In the figures, as I apply to the article, you can look at the typical included and typical factory parameters of the microcircuit.
The input is fed through an electric capacitor at 22 microfarads, the plan was to increase the input with a resistor of 10-20 to the ground, so that without seeing the background, if the plug is plugged in, so be it, I’ll check it without a connected signal. The temperature of the microcircuit in the range of norms is approximately 45-50 degrees after 30 minutes of work and at 80% tension. With you buv redmoon.
The selected books were divided by S. A. Gavrilov “The art of circuitry. Just about folding.
Proceedings
Read the beginning here:
Low frequency substation on microcircuits
Scheme on K174UN14
Microcircuits in low-frequency power supplies are stuck in a double order - otherwise warehouse part pіdsilyuvacha, or yak pіdsilyuvach as a whole. Let's use the butt of another concept - the K174UN14 microcircuit (a foreign analogue). Qia five microcircuit in the TO-220 case (in such cases the KT818-KT819 transistors are packed) we are preparing it for the first time until it is used, until it is necessary to add a sprat of binding elements. The scheme of such a pidsiluvach is shown in fig. 11.22.
Vaughn є typical and induced in the description of this microcircuit. I really want to give the reader one joy in the future - with unknown microcircuits, always choose your first design for typical scheme, so that without proper proof of work with this or that other microcircuit, you cannot determine how critical for the work is the type and/or denomination of that and the other element of the typical circuit.
Pay . Pіdsilyuvach zіbraniya drukovanіy platі z odnobіchny sclotekstoіtu zavtovshki 1.5 mm razmіr 22.5×30 mm. Breeding pay in mirror imageі you can take a scheme for the distribution of parts. Available with a demonstration of the robotic assistant.
There are no particular details that could be changed, but the working voltage was not lower than the voltage of the microcircuit. Starry look pіdsilyuvacha is presented in fig. 11.23.
Scheme on K157UD1
The butt of the zastosuvannya of the microcircuit as a warehouse part of the structure is a subsiluvach, the scheme of which is shown in fig. 11.24. The basis of the scheme is straining operational assistant K157UD1, until the output of any connection of a two-stage induction of tension on complementary pairs of VT1, VT2 and VT3, VT4.
The great reserve of the op-amp's tension, allowing it to get stuck in the power transistors with ordinary characteristics, and the great margin of strength - to get stuck in the output cascade mode C without additional power flow.
Pay . Pіdsilyuvach z_brany on drukovaniy platі z unilateral sklotstolitat zavtovshki 1.5 mm size 27.5 × 45 mm. The distribution of the other payment in the mirror image, that scheme of the distribution of details can be enchanted. there is a video from the demonstration of the work of the pilot.
Zovnіshnіy vglyad pіdsilyuvacha pointed to fig. 11.25.
Analogues . For the presence of the necessary details, they should be replaced in the future to the recommendations, included in the description of another option transistor podsiluvach. Call, shanovny radioamator, to independence!
Read the end
