RU31847U1 - DEVICE INDICATIONS - Google Patents

Description

CONSTRUCTION INDICATIONS

The utility model relates to radio engineering and can be used in instrumentation and measurement technology.

A display device for an alternating current network is known (see. "Application of a semiconductor (indicators, NP Vaserin and others M. Energoatomizdat, 1991, Fig. 2.1), consisting of a single indicator connected through a resistor to a power supply terminal, the second terminal of which is connected to the second output of the aforementioned single indicator, setting the required current through the semiconductor indicator, setting the required current through the semiconductor indicator, with the help of a resistor with a given value of the power supply, achieve the necessary indicator glow.

The disadvantage of the described device is the presence of a resistor connected between the anode of the semiconductor indicator and the positive pole of the power source, which limits the functionality of the circuit and leads to a relatively low utilization of the power source, as well as the presence of a large number of expensive elements of the blanking chains.

The closest in technical essence to the claimed utility model is a voltage indicator (US Pat. RF No. 2055369, MShS7 G01R 19/155, op. 27.02 96 G.X including two LEDs, a dimming circuit, a support element, a switch, an energy source, and the electrodes of the same name LEDs are connected together, the second electrode of the first LED is connected to the first output of the switch, the second LED through the reference element of the connection with the switch.

A disadvantage of the known device is the limited number of connected LEDs for measuring the brightness of the luminescence of the LEDs

with their switching and the impossibility of working in an alternating current network, a limited number of displayed states.

The problem, the 1st solution of which is directed by a utility model, is to expand the advanced capabilities of the claimed display device.

The technical result obtained with the utility model is to increase the reliability of operation of the display device and expand its functional capabilities.

The indicated technical result is achieved due to the fact that the indicating device, including two LEDs, a dimming circuit, a support element, a switch, an energy source, the LED electrodes of the same name are connected together, the second electrode of the first LED is connected to the first output of the switch, the second LED is connected through the support element with switch

is additionally equipped with a third LED and a series of two counterclockwise supporting elements shunting a third LED connected to the connection point of the same name electrodes of the first and second light-emitting diodes with an electrode of opposite polarity, the common connection point of the three LEDs is connected through the blanking chain to the first pole of the energy source, the second electrode of the third LED connected to the second pole of the energy source, which is an AC source, the switch is made in the form not less than two keys, the common output of which is connected to the second electrode of the third LED, the control outputs of the switching elements are connected to the controlled device.

The introduction of an additional third LED connected to the connection point of the same-name electrodes of the first and second LEDs with an electrode of opposite polarity makes it possible to use an alternating current source to power the circuit, creating the possibility of one-time monitoring of the state of the monitored

devices and the presence of voltage in the supply network, thereby increasing the functionality of the display device.

Using a shunt chain allows you to protect, when one of the LEDs comes out, the remaining LEDs, which will increase the reliability of the display device. In addition, the shunt circuit allows you to expand the range of the supply voltage.

The essence of the utility model is illustrated in the drawing, which shows a diagram of the display device.

Indication device includes:

1. The first LED.

2. The second LED.

3. The third LED.

4. The first Zener diode. / 3.

5. The second zener diode. / ol / l utl-Go / hg, g

6. Third Zener diode.coet f f. / s / gs7 /// 7/7. Extinguishing chain. pye / i / ey i / y

8. Switch. ,

9. The first contact of the switch. Yu. Second contact of the switch.

11. The first pole you exude alternating current.

12. The second pole of the AC source.

The third LED 3 by one of the electrodes is connected through a quenching circuit 7 to the first pole 11 of the AC source, and the second electrode to the second pole 12 of the AC source. LED 3 is shunted by two counter-active zener diodes 5 and 6. The same electrodes of the second 2 and third 1 LEDs are connected and connected through a blanking chain 7 to the first pole 11 of the AC source. The second electrode of the second LED 2 through an on-off first zener diode 4 is connected to the second terminal 10 of the switch 8. The second electrode of the first LED 1 is connected to the first

GS W

fl.

contact 9 of the switch 8. Moreover, the third LED 3 is connected to the connection point of the same name electrodes of the second 2 and third 3 LEDs with an electrode of opposite polarity.

The device operates as follows.

When applying the ac voltage network to the poles 11 and 12 of the energy source, the positive half-wave current limited by the quenching circuit 7 causes the third LED 3 to glow. The current does not flow through the zener diode 5 and 6, since the voltage drop on the third LED 3 is less than the threshold opening zener diodes 5 and b. If the contacts 9 and 10 of the switch 8 are not closed, the negative half-wave current flows through the shunt zener diodes 5 and b and the blanking chain 7. When the contact 10 of the switch 8 closes, the path of the half-current half-wave current does not change due to the on-board switching of the second 2 and first 1 LEDs, respectively. The negative half-wave current opens the first Zener diode 4 and lights up the second LED 2. The brightness of the first LED 3 does not change, since it is lit by another half-wave network voltage. When the contact 9 of the switch 8 is closed, the negative half-wave current flows through the first LED 1, igniting it. In this case, the current does not flow through the second LED 2 due to the fact that the voltage drop at the third zener diode is less than the voltage required to open the first zener diode 4 and the second LED 2 in series. With this inaz, the display logic is provided depending on the state of the switch 7. Brightness third LED 3 does not change. Zener diodes 5 and 6, in case of failure of one of the LEDs, additionally protect the remaining LEDs from high reverse voltage.

Using the claimed utility model will allow 11it:

-use an AC source;

Claims (1)

An indication device comprising two LEDs, a dimming circuit, a support element, a switch, an energy source, the LEDs of the same name being connected together, the second electrode of the first LED connected to the first output of the switch, the second electrode of the second LED through the supporting element connected to the second output of the switch, characterized in that is additionally equipped with a third LED and a sequential chain of two counterclockwise supporting elements shunting a third LED connected to a point connected of the same electrodes of the first and second LEDs with an electrode of opposite polarity, the common connection point of the three LEDs is connected through a quenching circuit to the first pole of the energy source, the second electrode of the third LED is connected to the second pole of the energy source, which is an alternating current source, the switch is made in the form of at least two keys, the common output of which is connected to the second pole of the energy source, the control inputs of the keys are connected to the controlled device.