TWI398760B - Display circuit of overheated motherboard - Google Patents

Description

Motherboard overheat indication circuit

The present invention relates to an indicating circuit, and more particularly to an indicating circuit that can indicate a computer failure caused by overheating of a motherboard.

The computer often crashes during use. When the machine is down, the performance is mostly blue screen of the monitor, the system cannot be started, the screen freezes, the mouse and keyboard cannot be input, the software runs abnormally interrupted, etc., which makes the operator worry. . There are many reasons for the computer to crash, such as poor heat dissipation, device mismatch, hard drive failure, virus infection, system file corruption or deletion, illegal operation, and so on. When the computer is down, the user usually cannot judge which cause is caused, which causes the phenomenon of frequent crashes, but can not respond accordingly to different reasons for the crash to improve the operation of the computer.

With the rapid development of computer technology, the computer running speed has been greatly improved. Correspondingly, the heat generated inside the computer is much higher than before. If the computer's cooling system can not dissipate the heat in time, it will cause the computer to be The machine even shuts down automatically. At this time, if there is no clear indication that the downtime or shutdown image is caused by overheating of the computer motherboard, the user can only process according to the usual program, and then eliminate the possible causes in turn. This not only wastes valuable time for the user, but also brings unnecessary trouble to the process.

In view of the above, it is necessary to provide an indicating circuit that can indicate a computer failure caused by overheating of the motherboard.

A motherboard overheat indicating circuit includes a function chip and a temperature control chip connected to the function chip, wherein the motherboard overheat indicating circuit further comprises a switch circuit and a light emitting component, wherein the input end of the switch circuit is connected to the temperature Controlling the wafer and receiving a pulse signal for controlling the on/off state of the switch circuit from the temperature control chip, the output end of the switch circuit is simultaneously connected to a first high level and a first end of the light emitting element, and the light emitting element is The two ends are connected to a second high level.

Compared with the prior art, the motherboard overheating indicating circuit of the present invention adds a switching circuit for controlling the alternate lighting of the LED, and when the system is thermally shut down, the temperature control chip controls the switching circuit to be turned off or turned on, thereby controlling The light-emitting diode is extinguished or lit to remind the user that the computer fault is caused by overheating of the motherboard.

10‧‧‧CPU chip

20‧‧‧ Temperature Control Wafer

30‧‧‧Switch circuit

50‧‧‧Connecting head

60‧‧‧Lighting diode

R1‧‧‧first resistance

R2‧‧‧second resistance

R3‧‧‧ third resistor

31‧‧‧PNP type transistor

31'‧‧‧ Field Effect Transistor

The first figure is the working principle of the preferred embodiment of the motherboard overheat indicating circuit of the present invention. Block diagram.

The second figure is a specific circuit diagram of the switch circuit in the first figure.

The third figure is a connection circuit diagram of the connector and the LED in the first figure.

The fourth figure is a specific circuit diagram of another preferred embodiment of the switch circuit in the first figure.

Referring to the first to third embodiments, a preferred embodiment of the motherboard overheat indicating circuit of the present invention includes a central processing unit (CPU) chip 10 disposed on a motherboard, a temperature monitoring chip 20, a switching circuit 30, and a connection. The connector 50 and a light emitting diode (LED) 60 connected to the connector 50.

The temperature control chip 20 is connected to the temperature control pin of the CPU chip 10. When the temperature of the CPU is higher than the limit temperature set by the system, the computer system is down or automatically shut down, and the CPU chip 10 sends a signal to the Temperature control wafer 20. After receiving the signal, the temperature control wafer 20 outputs a pulse signal PWRLED from the output pin of the temperature control chip 20 and sends it to the input terminal of the switch circuit 30.

The switching circuit 30 includes a switching device. In the embodiment, the switching device is a PNP-type transistor 31. The base of the transistor 31 and the output pin of the temperature control chip 20 pass through a first resistor R1. Connected, the emitter of the transistor 31 is grounded, and the collector is connected to a +5V power supply via a second resistor R2 and simultaneously connected to the pin 4 of the connector 50.

The pin 2 of the connector 50 is connected to another +5V power supply through a third resistor R3 and is simultaneously connected to the anode of the LED 206. The cathode of the LED 60 is connected to the connector 50. Pin 4.

In the present embodiment, the connector 50 is provided to facilitate connection of the LED body 60 to a computer motherboard. The anode of the LED 60 can also be directly connected to the +5V power supply through the third resistor R3, and the cathode can be directly connected to the output end of the switch circuit 30, that is, the collector of the transistor 31.

When the temperature of the CPU chip 10 is higher than the limit temperature set by the system (the motherboard is overheated), the temperature control chip 20 emits a pulse signal alternately appearing at a high level and a low level to the input end of the switch circuit 30, when the pulse signal is When the level is high, the PNP type transistor 31 is turned off. At this time, the anode and the cathode of the diode 60 are both turned on with a +5V high level, so the diode 60 is turned off and does not emit light; when the pulse signal is low At the level, the PNP-type transistor 31 is turned on and sends the low level to the pin 4 of the connector, that is, the cathode of the diode 60. At this time, the anode and the cathode of the diode 60 are positively generated. Light is turned on toward the voltage drop. The high and low levels generated by the temperature control wafer 20 alternately appear, so that the diode 60 also produces an alternating light-emitting phenomenon, thereby reminding the user that the computer failure is caused by overheating of the motherboard.

The fourth embodiment is a second preferred embodiment of the switching circuit, which differs from the first preferred embodiment in that the switching device is a P-channel enhancement type field effect transistor 31', and the field effect transistor 31 The gate is connected to the output terminal of the temperature control wafer 20, the drain of the field effect transistor 31' is grounded, and the source is connected to a +5V power supply via a second resistor R2, and is connected to the connector 50. Pin 4. Its working principle is the same as that of the first preferred embodiment.

In the above embodiment, the CPU chip 10 can be other wafers having similar functions, and the LEDs 60 can be replaced by other light-emitting elements.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims.

10‧‧‧CPU chip

20‧‧‧ Temperature Control Wafer

30‧‧‧Switch circuit

50‧‧‧Connecting head

60‧‧‧Lighting diode

Claims (13)

A motherboard overheat indicating circuit includes a function chip and a temperature control chip connected to the function chip, wherein the motherboard overheat indicating circuit further comprises a switch circuit and a light emitting component, wherein the input end of the switch circuit is connected to the temperature a control chip, the function chip controls the temperature control chip to output a pulse signal for controlling the on/off state of the switch circuit to the switch circuit, and the output end of the switch circuit is simultaneously connected to a first high level and the light emitting element a first end, the second end of the light emitting element is connected to a second high level, the switch circuit comprises a PNP type transistor, and an output end of the temperature control chip is connected to a base of the PNP type transistor, the PNP The emitter of the type transistor is grounded, and the collector is connected to the first end of the light emitting element. The motherboard overheat indicating circuit according to claim 1, further comprising a connector, the connector includes a first pin and a second pin, the first pin being connected to the output end of the switch circuit And the first high level, the second pin is connected to the second high level. The motherboard overheat indicating circuit according to claim 2, wherein the first end of the light emitting element is connected to the first pin of the connector, and the second end of the light emitting element is connected to the second end of the connector Pin. The motherboard overheat indicating circuit according to claim 1, wherein the switch circuit further comprises a first resistor connected in series between the temperature control chip output end and the PNP type transistor base. The motherboard overheat indicating circuit according to claim 1, wherein the The switching circuit includes a P-channel enhancement type field effect transistor, and an output end of the temperature control chip is connected to a gate of the P-channel enhancement type field effect transistor, and the P-channel enhancement type field effect transistor has a drain Grounded, the source is connected to the first end of the light emitting element. The motherboard overheat indicating circuit according to claim 1, wherein a second resistor is disposed between the output end of the switch circuit and the first high level, and the second end of the light emitting element is the second highest A third resistor is provided between the levels. The motherboard overheat indicating circuit according to claim 1, wherein when the temperature of the functional chip is higher than a temperature set by the computer system, the output end of the temperature control chip generates a pulse signal with alternating high and low levels. A motherboard overheat indicating circuit includes a function chip and a temperature control chip for generating a high and low level alternate pulse signal when the temperature of the function chip is higher than a set temperature of the computer system, wherein the motherboard overheat indicating circuit further includes an on and off The state is controlled by the switching circuit of the pulse signal and a light-emitting diode controlled by the switching circuit to generate an alternating brightening phenomenon when the temperature of the functional chip is higher than a set temperature of the computer system, and the switching device is a PNP type transistor The base of the PNP type transistor is connected to the output end of the temperature control chip through a first resistor. The emitter of the PNP type transistor is grounded, and the collector is connected to the first high level through a second resistor. The motherboard overheat indicating circuit according to claim 8 , wherein the switch circuit comprises a switching device whose input end is connected to the cathode of the light emitting diode and the cathode of the light emitting diode. The motherboard overheat indicating circuit according to claim 8, wherein the switching device is a P-channel enhanced field effect transistor, and the P-channel enhanced field The gate of the effect transistor is connected to the output terminal of the temperature control chip, the drain of the P-channel enhancement type field effect transistor is grounded, and the source is connected to the first high level through a second resistor. The motherboard overheat indicating circuit of claim 8, wherein the anode of the light emitting diode is connected to a second high level. The motherboard overheat indicating circuit according to claim 11, further comprising a third resistor connected to the anode of the LED and the second high level. The motherboard overheat indicating circuit according to claim 8, wherein the functional chip is a central processing unit chip.