Drive circuit of computer system for driving a mode indicator
A drive circuit of a computer system is for driving a mode indicator. The computer system includes a first port and a second port. The mode indicator includes a first receiving end and a second receiving end. The drive circuit includes a first input end connected to the first port, a second input end connected to the second port, a first output end connected to the first receiving end, a second output end connected to the second receiving end, a power supply, a first transistor connected between the first input end and the power supply, and a second transistor connected between the second input end and the power supply. Collectors of the first and second transistors are separately connected to the first and second output ends. The mode indicator is dichromatic and has two LEDs emitting non-matching colored light.
1. A drive circuit of a computer system, the computer system comprising a PCB with a first port and a second port, the drive circuit comprising:
a first input end adapted to connect to the first port;
a second input end adapted to connect to the second port;
a mode indicating unit having a first receiving end and a second receiving end, the mode indicating unit comprising a first indicator and a second indicator connected inversely in parallel between the first receiving end and the second receiving end;
a power supply;
a first transistor comprising a first terminal connected to the first input, and a second terminal connected to the first receiving end of the mode indicating unit and the power supply; and
a second transistor comprising a first terminal connected to the second input, and a second terminal connected to the second receiving end of the mode indicating unit and the power supply.
2. The drive circuit as claimed in claim 1 , wherein a first resistor is connected between the first input end and the first terminal of the first transistor, and a second resistor is connected between the second input end and the first terminal of the second transistor.
3. The drive circuit as claimed in claim 2 , wherein a third resistor is connected between the power supply and the second terminal of the first transistor, and a fourth resistor is connected between the power supply and the second terminal of the second transistor.
4. The drive circuit as claimed in claim 3 , wherein third terminals of the first transistor and the second transistor are grounded.
5. The drive circuit as claimed in claim 1 , wherein first input end can receive a working signal from the first port of the PCB, and the second input end can receive a sleeping signal from the second port of the PCB.
6. The drive circuit as claimed in claim 5 , wherein the power supply is adapted to receive a 5V voltage.
7. The drive circuit as claimed in claim 1 , wherein the first and second output ends are able to output signals for display by the first indicator and the second indicator of the indicating unit.
8. A drive circuit of a computer system, the computer system comprising a PCB with a first port and a second port, the drive circuit comprising:
a mode indicating unit comprising a pair of light emitting diodes connected inversely in parallel between a first receiving end and a second receiving end, an anode end of one light emitting diode connecting with a cathode end of the other light emitting diode;
a first transistor connected between the first port of the PCB and the first receiving end of the mode indicating unit; and
a second transistor connected between the second port of the PCB and the second receiving end of the mode indicating unit.
9. The drive circuit as claimed in claim 8 , further comprising a first resistor, wherein the first transistor comprises a base and an emitter, the first resistor is for connecting the first port of the PCB and the base, and the emitter is for grounding.
10. The drive circuit as claimed in claim 9 , further comprising a second resistor, wherein the first transistor further comprises a collector, the collector is for connecting to the first receiving end of the mode indicating unit, and the second resistor is for connecting between a power supply and the collector.
11. The drive circuit as claimed in claim 8 , further comprising a first resistor, wherein the second transistor comprises a base and an emitter, the first resistor is for connecting between the second port of the PCB and the base, and the emitter is for grounding.
12. The drive circuit as claimed in claim 11 , further comprising a second resistor, wherein the second transistor further comprises a collector, the collector is for connecting to the second receiving end of the mode indicating unit, and the second resistor is for connecting between a power supply and the collector.
13. The drive circuit as claimed in claim 8 , wherein the first transistor can receive a working signal from the first port of the PCB, and the second transistor can receive a sleeping signal from the second port of the PCB.
14. The drive circuit as claimed in claim 8 , further comprising a power supply adapted to receive a 5V voltage.
15. The drive circuit as claimed in claim 8 , wherein the first and the second transistor can output signals for the mode indicating unit display by dichromatic.
16. A system for indicating work statuses of an electronic part, comprising:
at least two indicators capable of presenting indications differently so as to refer said indications thereof to at least two respective work statuses of an electronic part;
a power supply capable of powering each of at least two indicators so as to support indication presentation of said each of said at least two indicators; and
at least two switches electrically connectable to said power supply and said at least two indicators, said at least two indicators connected inversely in parallel between said at least two switches, an anode of one of said at least two indicators connected to a cathode of the other one of said at least two indicators, each of said plurality of switches corresponding to said each of said at least two indicators, said each of said plurality of switches capable of accepting a control signal from said electronic part so as to control said powering of said corresponding each of said at least two indicators based on said control signal.
17. The system as claimed in claim 16 , wherein said each of said at least two switches is a transistor.
18. The system as claimed in claim 16 , wherein said at least two indicators are integrally formed in a dichromatic indicator.
19. The drive circuit as claimed in claim 1 , wherein the first receiving end of the indicating units is connected to an anode of the first indicator and a cathode of the second indicator, the second receiving end of the indicating units is connected to an anode of the second indicator and a cathode of the first indicator.
20. The system as claimed in claim 16 , wherein a first terminal of said each of said at least two switches is electrically connectable with a port of said electronic part to accept said control signal, and a second terminal of said each of said at least two switches is electrically connectable with said power supply and said at least two indicators in series.