Lantern An 0 005 Dick 05. LED Indicator current in chains with capacitive ballast - Construction of simple complexity - Schemes for beginners

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Flashlight Fo Dick An-0-003 performance is not known .. with the mind all the integer inside the battery of course not workers

Flashlight FD D and K

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Dear buyers! I want to inform you about some nuances that may arise when buying my lots. All lots are also sold on other sites. And there may be a situation when the day of the lot will be sold on another site, and I can remove it from the bidder only in the evening. And if on this day you buy a lot, then it may not be in stock. This situation occurs extremely rare, but it is still desirable to inform you before purchasing about the presence of a lot. I apologize in advance if such a situation arises.

All that I sell or buy, like anyone, I try to further discuss in personal correspondence and especially the conditions for sending goods, and naturally the payment itself .. as always everything changes and sometimes, as you want, it can not go to send a product and get paid , as well as send money to the usual and familiar way to the buyer ...

Sl.elkin, Zhytomyr

New rechargeable flashlight (ACF) russian production trademark FO-DIC model An 0-005 with Chinese disk batteries (Fig. 1)

It worked somehow unstable, batteries (AK) were given an electric container, then no. For more convenient operation (including to determine the failure of the charger), the charge current indicator was set to it, the diagram of which is shown in Fig.2.

For some time, ACF worked fine, and then the LED stopped glowing. Checking the VD3 LED and the R3 resistor showed that they are working. The cause of the inoperability was the defect of the ballast capacitor C1, the actual capacity of which was an order of magnitude lower, i.e. 47 NF! In addition, defects in imported capacitors of this type in the practice of repairing ACF are found, and quite often.
Since there was no new capacitor at hand, I decided to recharge the batteries (on the housing of which the Ni-CD cell B280K is applied) from the DC source. To accelerate the charge process, the charge current up to 100 mA has shown shortly. And what pleased - AK did not warm at all! After a four-hour charge (double rearness by capacity) included AK on a discharge on the light bulb 3.5 V x 0.15 A, which shone about 1.5 hours. From here concluded that everything is fine with AK. Well, if modern AK is larger (against the electric container received for hermetic - 0.1), the charge current is not hot, installed the ballast tank twice as much, i.e. 1 μF.
Included parallel to the existing shunt resistor 100 ohms, having reduced it twice. After 2-3 trial connections to the network, the LED failed! It became clear that the dependence of the voltage drop on the shunt from the capacity of the tank is substantially nonlinear, therefore installed the shunt resistance of 12 ohms. When the ACF is connected to the network, the LED flashed and the GAS, although the charge current was! This clearly confirmed the impulse nature of the current change through the LED indicator in the circuit with the capacitive ballast in the initial phase.

I had to say, it was said, to return to "our branches" - he conducted a selection of Shunt in the stationary mode on a constant current. The resulting parameters are shown in the line 1 line.

However, after some time of operation, the ACF LED with a shunt resistor with a nominal value of 24 ohm still failed!
It became clear that the transitional impulse processes (as well as the East) is a delicate matter, and that in the causes of the failure of the indicator (with a ballast capacitor 1 of the ICF) will have to be understood seriously.
Since the failure of the LED from the reverse voltage application is unlikely, as it is included in consistently with a rectifier diode, suggested that it fails during a series of pulses ("rat" of contacts - this is exactly how convenient to present the processes occurring in the circuit at the time of the ACF connection to the network). It was then that the voltage drops on the shunt, as a result of which the impulse current of the current through the LED although briefly, but significantly exceeds the permissible value, and this leads to the failure of it.
In order not to engage in a thorough selection of shunt, the value of which may differ from the values \u200b\u200bof the resistors of the standard row, to automatically limit the amplitude of the voltage pulse arising at the shunt (and therefore on the LED), I decided to install the KS133A stabilion in parallel, using it as a suppressor.
A scheme was collected for checking the circuit (Fig. 4)

And measurements were measured by the magnitude of the voltage at the shunt in various modes, to a certain extent, imitating the nature of the current change through the ballast capacitor during its primary charging. The measurements were carried out at a direct current from the source with an adjustable output voltage at a constant value of the resistance of the shunt equal to 24 ohms.
From the line 2 tables it can be seen that already when the voltage drops on the shunt, equal to 2 V, the current via Vd2 is equal to the maximum.
That is why to limit the current value of the current LED when the voltage drops on the shunt, equal to 3.3 V (line 3 of the table), in the diagram sequentially with VD2, the resistor R3 was introduced.
As follows from the row 3 of the table, the current value through the LED with the introduction of R3 also does not exceed 20 mA.
When switching to the stationary mode 2 (line 4 of the table) The value of the current vd2 with successively turned on R3 decreases to 1.5 mA, which, when using the LED al307a (red luminescence), visually completely distinguishable even with sunlight.
In order to verify the reliability of the LED indicator in the circuit with a capacitive ballast Upgraded ACF (Fig.5)

Removed and installed in a network rosette 100 times in a row - with no tangible changes in the brightness of the glow visually noticed. The LED indicator with suppressor on Stabilon worked properly, the failure of the LED did not happen!
The experiment carried out allows to make a practical conclusion that due to the nature of the transition processes occurring due to considerations of sufficient reliability, use a simple resistive shunt for ballast capacity up to 0.5 μF for the indicator on the LED is still possible, and already at 1 μF and above - only in combination of shunt - Suppressor is a strict resistor.


Literature
1. Tereshchuk P.M. et al. Small-sized radio equipment. Directory of the radio amateur // Kiev, Nukova Dumka, 1971.
2. Reference sheet. Transition voltage suppressors // Radioimator. -1999.-NC2.-C.3L
3. Terecher P.M. and others. Semiconductor receiving and amplifying device. Handbook of the lifeline // Kiev, Nukova Dumka, 1988.

As a sample, take the battery flashlight of the company "DIC", "Lux" or "Cosmos" (see photo). This pocket flashlight, small-sized, comfortable in hand and with a fairly large reflector - 55.8 mm in diameter, lED matrix Which has 5 white LEDs, which provides good and large spotlight.

In addition, the form of a flashlight is all familiar, and many since childhood, one word - brand. The charger is inside the lantern itself, it is only worth removing the cap and stick it into the outlet. But, nothing stands in place and this design of the flashlight also has undergone changes, especially its inner filling. The latest model at the moment is Dick An 0-005 (or DIC-5 euro).

Earlier versions are Dick An 0-002 and DIC An 0-003 differ in that they had disk batteries (3 pieces), Ni-CD series D-025 and D-026, with a capacity of 250 mA / hours, or in The An 0-003 models are the assembly of already new batteries D-026D with a greater capacity, 320 mA / h and incandescent bulbs by 3.5 or 2.5 V, with a current of consumption 150 and 260 mA, respectively. LED, for comparison, consumes about 10 mA and even a matrix of 5 pieces is 50 mA.

Of course, with such characteristics, the flashlight could not shine long, it was enough for 1 hour for 1 hour, especially the first models.

What is this in last model Flashlight Dick An 0-005?

Well, first - LED matrix of 5 LEDs, unlike 3 or incandescent bulbs, which gives significantly more light with a smaller consumption current, and the second - in the flashlight is only 1 finger modern Ni-MH battery with 1.2 -1.5 V and capacity from 1000 to 2700 mA / h.

Some will ask, how do you like a finger battery for 1.2 V can "light" LEDs, because they brightly shine needed about 3.5 V? For this reason, in earlier models, 3 batteries were set and received 3.6 V.

But, I do not know who first came up with, the Chinese or someone else, make a transducer (multiplier) of voltage from 1.2 V to 3.5 V. Scheme simple, in Chinese lanterns it is just 2 parts - a resistor and radio component like a similar On the transistor with marking - 8122 or 8116, or SS510, or SK5B. SS510 is a Schottky diode.

Lighting such a flashlight is good, bright, and that is not unavailable - long, and cycles charge-discharge is not 150, as in previous models, but much more, which increases the service life at times. But!! To lED flashlight He served for a long time, you need to insert it into the outlet from 220 V in the off state! If this rule does not adhere to that when charging, you can easily burn the Schottki diode (SS510), and often at the same time and the LEDs.

I once had to repair the lantern Dick An 0-005. I do not know exactly what was the reason for the exit of it, but I assume that they stuck it in a socket and forgot for a few days, although it should be charged on a passport for no more than 20 hours. In short, the battery, flutter, and burned 3 LEDs out of 5, plus the converter (diode) also stopped working.

My battery with a 2700 mA / h I had, remained from the old camera, the LEDs, too, but find the item - SS510 (Schottky diode), turned out to be problematic. This LED flashlight is most likely Chinese origin and this detail will probably buy only there. And then I decided to make the voltage converter from those parts what is, i.e. From domestic: transistor Kt315 or CT815, a / h transformer and others (see the scheme).

The scheme is not Nova, it has long existed, I only used it in this flashlight. True, instead of 2 radio components, like the Chinese, I got 3, but Darm.

The electrical circuit, as you can see, the elementary, the most difficult thing is to wind the RF transformer on the ferrite ring. The ring can be used from an old pulse power supply unit, from a computer, or from an energy-saving non-working light bulb (see photo).

The outer diameter of the ferrite ring is 10-15 mm, the thickness is approximately 3-4 mm. It is necessary to hide 2 windings of 30 turns with a wire of 0.2-0.3 mm, i.e., 1 turn 30 turns first, then we make a removal from the middle and 30 more. If the ferrite ring takes off the luminescent bulb board - it is better to use 2 pieces, folded them together. On one ring, the same scheme will work, but the glow will be weaker.

Compared 2 lanterns on the glow, the original (Chinese) and converted by above the specified scheme - the differences in brightness almost did not see. The converter, by the way, can be inserted not only in the battery lantern, and in the usual, which works from the batteries, then it will be possible to pave it from only 1 battery of 1.5 V.

The diagram of the charging device of the change lantern has almost undergone, with the exception of the denominations of some parts. Charging current about 25 mA. When charging, you need to turn off the flashlight! And do not stick the switch during charging, since the charging voltage is more than 2 times higher than the battery voltage, and if it goes to the converter and intensifies - the LEDs are partially or fully changed ...

In principle, the above-mentioned scheme, the LED flashlight can be easily done with your own hands, by mouncing it, for example, in the body of some old, even the most ancient flashlight, and you can make a body and yourself.

And in order not to change the structure of the witch of the old flashlight, where the small incandescent bulb was used by 2.5-3.5 in the already burned light bulb and to the base, instead of a glass flask, soldered 3-4 white LEDs.

And also, for charging, mount the connector under the network cord, from the old printer or receiver. But, I want to sharpen your attention if a metal lantern hull - charger Do not mount there, but make it remote, i.e. separately. It is not difficult to remove the finger battery from the flashlight and insert it into the memory. And do not forget to isolate everything well! Especially in those places where voltage 220 V.

I think, after rework, the old flashlight will last you not yet one year ...