CN216451569U - Novel equipment state indicating circuit - Google Patents

Abstract

The utility model discloses a novel equipment state indicating circuit, which comprises: a CPU on which a watchdog is arranged; the base level of the triode is connected with the IO end of the CPU; and the anode of the light-emitting diode is connected with the collector of the triode. The utility model improves and optimizes the traditional light-emitting diode indicating circuit, not only improves the integration level of equipment, but also reduces power consumption and saves energy, and is suitable for electronic products in the fields of industry, civil use and the like.

Description

Novel equipment state indicating circuit

Technical Field

The utility model relates to the technical field of indicating lamp circuit devices, in particular to a novel equipment state indicating circuit.

Background

In order to facilitate users to observe the device status, the electronic device often uses a light emitting diode as an indicator light to indicate the device status, and the most commonly used indication modes include 'power supply' and 'operation', the former indicates whether the operating power supply of the device is normal, and the latter indicates whether the operating status of the device is normal.

At present, the indicator lamps need to be installed on a panel of the equipment to be observed by a user, so that two indicator lamps necessarily occupy two positions of the panel, and therefore the indicator lamps are not suitable for equipment with a small panel. If the power indicator lamp is simply cancelled and only the running indicator lamp is used for indicating the power supply and the running state of the equipment, the situation that the indicator lamp cannot indicate whether the power supply is normal or not during the period when the equipment is just powered on and the CPU does not work normally exists.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.

To achieve these objects and other advantages in accordance with the purpose of the utility model, there is provided a novel device status indication circuit including: a CPU on which a watchdog is arranged; the base level of the triode is connected with the IO end of the CPU; and the anode of the light-emitting diode is connected with the collector of the triode.

Preferably, a current limiting resistor is arranged on the base electrode of the triode.

Preferably, a pull-down resistor is arranged on the base electrode of the triode.

Preferably, a pull-up resistor is disposed on the triode collector.

Preferably, the light emitting diode can be replaced by a display screen, a buzzer, a vibrating motor and other prompting devices.

The utility model at least comprises the following beneficial effects:

the utility model improves and optimizes the traditional light-emitting diode indicating circuit, not only improves the integration level of equipment, but also reduces power consumption and saves energy, and is suitable for electronic products in the fields of industry, civil use and the like.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Description of the drawings:

FIG. 1 is a general circuit schematic of the present invention;

the specific implementation mode is as follows:

the present invention is described in further detail below with reference to the attached drawings so that those skilled in the art can implement the utility model by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

It is to be understood that in the description of the present invention, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are used only for convenience in describing the present invention and for simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or a communication between two elements, and those skilled in the art will understand the specific meaning of the terms in the present invention specifically.

Further, in the present invention, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature.

Fig. 1 shows an implementation form of the present invention, including:

a CPU 1 on which a watchdog 11 is provided;

the base level of the triode 2 is connected with the IO end of the CPU 1;

and the anode of the light emitting diode 3 is connected with the collector of the triode 2.

The working principle is as follows:

when the utility model is used, when the equipment is started and the CPU 1 does not enter a normal working state, the IO end of the CPU 1 is in a high-resistance state, so that the triode 2 is cut off, and the power supply voltage is basically and completely applied to the light-emitting diode 3, so that the light-emitting diode 3 is conducted to emit light, thereby indicating that the power supply is normal and the CPU 1 does not operate the working state; after the CPU 1 works normally, the IO end of the CPU 1 is controlled to output a periodic signal with low time for 1 second and high time for 1 second, the triode 2 is cut off in the low signal period, the light-emitting diode 3 is conducted to emit light, the triode 2 is conducted in the high signal period, the light-emitting diode 3 loses voltage to be extinguished, the periodic change signal generated by the IO end of the CPU 1 can enable the light-emitting diode 3 to flicker periodically, and therefore the working state that the power supply and the CPU 1 run normally is indicated; when the CPU 1 is interfered by the outside and the program is run off, the IO end of the CPU 1 is in a long high state or a long low state, the watchdog 11 generates a reset signal to reset the CPU 1, and during the period from the reset of the CPU 1 to the normal operation of the CPU 1, the IO end of the CPU 1 is in a high resistance state, so that the triode 2 is cut off, the light emitting diode 3 is conducted to emit light, and the working state that the power supply is normal and the CPU is not operated is indicated.

In the technical scheme, the power supply and the CPU 1 do not need to be directly connected with own indicator lamps, and the working states of the power supply and the CPU 1 can be simultaneously monitored and reflected in real time by arranging the triode 2 in the middle, so that the phenomenon that the vacuum period of state display occurs when the power supply and the CPU 1 independently display the states through the own indicator lamps, the observation of personnel is influenced or a judgment error is caused is avoided; the triode 2 is used as a contactless electronic switch, has no movable contact part, does not generate electric arc or spark when being switched on and off, has rapid action, long service life and high reliability, and is very suitable for special environments such as fire prevention, explosion prevention, moisture prevention and the like, so that the states of light emitting, extinguishing, flickering and the like are more stable by using the triode 2 to continuously switch and trigger the light emitting diode 3; and finally, one light-emitting diode 3 is selected to be used as a prompting device of various states, so that more installation space can be saved on the panel, and the driving circuit of the light-emitting diode 3 is simple, low in cost and high in stability and reliability; an external watchdog 11 monitoring circuit is arranged on the CPU 1, and can be stably reset when the CPU 1 has errors, so that the whole equipment state indicating circuit is safer and more stable, and the state indication of the light-emitting diode 3 is not influenced.

In the above technical solution, a current limiting resistor 21 is disposed on the base of the triode 2. The arrangement can protect the triode 2 and prevent the triode from being burnt out due to overlarge current.

In the above technical solution, the base of the triode 2 is provided with a pull-down resistor 22. The reason for this is that the base of the triode is controlled by the IO terminal of the CPU 1, so that the output level of the IO terminal may be unstable when the CPU 1 is initialized, and the base of the triode is pulled down to a proper low level to prevent malfunction.

In the above technical solution, a pull-up resistor 23 is disposed on the collector of the triode 2. The reason for this is that since it is necessary to repeatedly switch the transistor 2 on and off to control the led 3 connected to the collector of the transistor 2, the pull-up resistor 23 is connected to limit the current flowing through the transistor 2 and the led 3, thereby protecting the transistor 2 and the led 3.

In the above technical solution, the light emitting diode 3 may be replaced by a display screen, a buzzer, a vibrating motor, or other prompting devices. The circuit can be assembled by selecting proper prompting equipment according to different use requirements through the arrangement, and the applicability is strong.

The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

While embodiments of the utility model have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the utility model pertains, and further modifications may readily be made by those skilled in the art, it being understood that the utility model is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims (3)

1. A novel device status indication circuit, comprising:

a CPU on which a watchdog is arranged;

the base level of the triode is connected with the IO end of the CPU; a pull-down resistor is arranged on the triode base;

the anode of the light-emitting diode is connected with the collector of the triode; the light emitting diode is replaced by one of a display screen, a buzzer or a vibration motor.

2. The novel device status indicating circuit as claimed in claim 1, wherein a current limiting resistor is provided on the base of said triode.

3. The novel device status indicating circuit as claimed in claim 1, wherein a pull-up resistor is provided on the triode collector.

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