Hard disk indicating lamp circuit on computer mainboard
By designing a hard disk indicator light circuit on the computer motherboard and using connectors and N-channel dual MOS tubes to isolate the signal clamp, the problem of hard disk indicator light consistency on special-shaped motherboards is solved, the consistency of hard disk indicator lights on the motherboard and front panel is achieved, and the design and production costs are reduced.
Patent Information
- Application Number
- CN202422528004.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-18
AI Technical Summary
In computer motherboard design, special-shaped motherboards need to integrate a hard drive indicator light interface on the front panel. However, the front panels of different products or models have inconsistent shapes and functions, which leads to challenges in saving design and production costs. Existing technologies make it difficult to simultaneously support the consistency of hard drive indicator lights on the front panel and the motherboard.
A hard disk indicator light circuit for a computer motherboard is designed. The circuit includes components such as a connector, a dual MOS transistor, a diode, and a resistor. By establishing an electrical connection between the motherboard and the front panel and using N-channel dual MOS transistors to isolate and clamp the signal, the brightness of the hard disk indicator lights on the motherboard and front panel are consistent.
This achieves consistency in the status of the hard drive indicator lights on the motherboard and front panel, avoids the problem of inconsistent brightness caused by signal clamping, meets the compatibility requirements of different products or models, and reduces design and production costs.
Smart Images
Figure CN223347331U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic computers, in particular to a hard disk indicator light circuit on a computer mainboard. Background Art
[0002] The front panel is a key component of a desktop computer chassis. It typically features a power switch, reset button, USB ports, power indicator, hard drive indicator, and other functional components. These components, such as the power switch, reset button, USB ports, power indicator, and hard drive indicator, are connected to the corresponding ports or connectors on the computer motherboard via cables.
[0003] The power indicator on the front panel displays the computer's power status. It stays on when the computer is turned on. The hard drive indicator on the front panel displays the hard drive's status. A flashing audio indicator indicates the hard drive is operating.
[0004] When designing computer motherboards, many customers currently require custom-shaped motherboards. This is primarily to avoid the expense of a small front panel board during computer assembly, effectively placing the functions of the front panel directly onto the motherboard. For example, the power indicator and hard drive indicator light may be placed directly onto the motherboard. However, the front panels of different products or models may have different functions. Some may only have a power indicator and a hard drive indicator light, while others may also have USB ports, AUDIO ports, and so on. To save design and production costs, it is still necessary to create interfaces or connectors for the front panel on the motherboard, while reserving the interface locations for the hard drive and power indicator lights on the front panel as optional alternatives.
[0005] Therefore, it is urgent to design a circuit when both the hard disk indicator light interface on the front panel and the hard disk indicator light on the computer mainboard exist. Summary of the Invention
[0006] Therefore, the purpose of the present invention is to provide a hard disk indicator light circuit on a computer motherboard, which can simultaneously support the hard disk indicator light on the front panel and the hard disk indicator light on the computer motherboard.
[0007] To achieve the above-mentioned object, the present invention provides a hard disk indicator light circuit on a computer motherboard, comprising: a connector for establishing an electrical connection between the motherboard and the front panel, a motherboard hard disk indicator LED, a diode, an N-channel dual MOS transistor, a first resistor, a second resistor, and a third resistor; a hard disk status signal reflecting the working status of the hard disk on the motherboard is input to the cathode of the diode, the anode of the diode is electrically connected to a first circuit node, the first circuit node is electrically connected to a first power supply on the motherboard via a first resistor, and the hard disk status signal is 0V when the hard disk is working normally; the N-channel dual MOS transistor includes a first MOS transistor and a second MOS transistor; the gate of the first MOS transistor is electrically connected to the first A circuit node, the source is grounded, and the drain is electrically connected to the 3.3V standby power supply on the mainboard via a second resistor; the gate of the second MOS tube is electrically connected to the 3.3V standby power supply on the mainboard via a second resistor, the source is grounded, and the drain is electrically connected to the second circuit node; the pin on the connector for electrically connecting the anode of the hard disk indicator LED on the front panel is electrically connected to the second power supply on the mainboard, and the pin on the connector for electrically connecting the cathode of the hard disk indicator LED on the front panel is electrically connected to the second circuit node, and the second circuit node is electrically connected to the 3.3V standby power supply on the mainboard via a third resistor; the anode of the hard disk indicator LED on the mainboard is electrically connected to the second power supply, and the cathode is electrically connected to the second circuit node.
[0008] Among them, the model of the motherboard hard disk indicator LED is LUEAG30640-H221.
[0009] In which, the diode includes a first diode and a second diode; the hard disk status signal includes a first hard disk status signal and a second hard disk status signal; the first hard disk status signal is input into the cathode of the first diode, and the anode of the first diode is electrically connected to the first circuit node; the second hard disk status signal is input into the cathode of the second diode, and the anode of the second diode is electrically connected to the first circuit node.
[0010] The diode model is LBAT54HT1G.
[0011] The model of the N-channel dual MOS transistor is L2N7002DW1T1G.
[0012] Wherein, the resistance of the first resistor is 4.7 kilo-ohms.
[0013] Wherein, the resistance of the second resistor is 10 kilo-ohms.
[0014] Wherein, the resistance of the third resistor is 10 kilo-ohms.
[0015] Wherein, the first power supply is a 3.3V power supply.
[0016] Wherein, the second power supply is a 5V power supply.
[0017] In summary, the hard disk indicator light circuit on the computer mainboard of the present invention can simultaneously support the hard disk indicator light on the front panel and the hard disk indicator light on the computer mainboard. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present invention apparent.
[0019] Figure 1 This is a circuit diagram of a preferred embodiment of the hard disk indicator light circuit on a computer motherboard of the present invention. DETAILED DESCRIPTION
[0020] See also Figure 1 , which is a circuit diagram of a preferred embodiment of the hard disk indicator light circuit on the computer motherboard of the utility model. Figure 1 In the figure, pins 1 and 3 on the connector JPANEL1 are related to the hard disk indicator light on the front panel, pins 2 and 4 are related to the power indicator light on the front panel, pins 5 and 7 are related to the reset button on the front panel, and pins 6 and 8 are related to the power button on the front panel. In other words, the solution of the present invention is mainly aimed at the left part of the connector JPANEL1, that is, the related circuits behind the hard disk status signal HDD_LED- and PCIE_SSD_LED- that reflect the working status of the hard disk on the motherboard.
[0021] The hard disk indicator light circuit on a computer motherboard of the present invention mainly includes: a connector JPANEL1 for establishing an electrical connection between the motherboard and a front panel, a motherboard hard disk indicator LED LED2, diodes D1 and D3, an N-channel dual MOS transistor Q6, a first resistor R2, a second resistor R2527, and a third resistor R252; hard disk status signals HDD_LED- and PCIE_SSD_LED- reflecting the working status of the hard disk on the motherboard are respectively input to the cathodes of the diodes D1 and D3, the anodes of the diodes D1 and D3 are electrically connected to a first circuit node, and the first circuit node is electrically connected to a first power supply P3V3 on the motherboard via a first resistor R2. The hard disk status signals HDD_LED- and PCIE_SSD_LED- are 0V when the hard disk is working normally; the N-channel dual MOS transistor Q6 includes a first MOS transistor and a second MOS transistor; the gate Q6 pin 2 of the first MOS transistor is electrically connected to the first circuit node, the source Q6 pin 1 is grounded, and the drain Q6 pin 6 is electrically connected to a 3.3V standby power supply P3V on the motherboard via a second resistor R2527. 3SB; the gate Q6 pin 5 of the second MOS tube is electrically connected to the 3.3V standby power supply P3V3SB on the motherboard via the second resistor R2527, the source Q6 pin 4 is grounded, and the drain Q6 pin 3 is electrically connected to the second circuit node; the pin on the connector JPANEL1 for electrically connecting the anode of the hard disk indicator LED on the front panel, i.e., JPANEL1 pin 1, is electrically connected to the second power supply P5V on the motherboard, and the pin on the connector JPANEL1 for electrically connecting the cathode of the hard disk indicator LED on the front panel, i.e., JPANEL1 pin 3, is electrically connected to the second circuit node, and the second circuit node is electrically connected to the 3.3V standby power supply P3V3SB on the motherboard via the third resistor R252; the anode of the motherboard hard disk indicator LED LED2, i.e., LED2 pin 3, is electrically connected to the second power supply P5V, and the cathode, i.e., LED2 pin 4, is electrically connected to the second circuit node.
[0022] In this preferred embodiment, the motherboard hard drive indicator LED, LED2, is of model LUEAG30640-H221. The diodes D1 and D3 are of model LBAT54HT1G. The N-channel dual MOS transistor Q6 is of model L2N7002DW1T1G.
[0023] In this preferred embodiment, diodes D1 and D3 form a "wired AND" function, supporting two hard disk status signals HDD_LED- and PCIE_SSD_LED-, satisfying the simultaneous indication of NVME hard disk and SATA hard disk status.
[0024] In this preferred embodiment, the resistance of the first resistor R2 is 4.7 kilo-ohms, the resistance of the second resistor R2527 is 10 kilo-ohms, the resistance of the third resistor (R252) is 10 kilo-ohms, the first power supply P3V3 is a 3.3V power supply, and the second power supply P5V is a 5V power supply.
[0025] See also Figure 1 In this preferred embodiment, because diodes D1 / D3 are included and followed by an N-channel dual MOS transistor Q6, signal HDD_LED-_D requires a pull-up resistor R2 to P3V3; otherwise, dual MOS transistor Q6 will not turn on. Dual MOS transistor Q6 is added primarily because, for either the hard drive indicator LED on the front panel (i.e., the LED connected to JPANEL1) or the hard drive indicator LED2 on the motherboard to illuminate, either HDD_LED- or PCIE_SSD_LED- must be at a low level (0V). However, due to the clamping action of D1 and D3, signal HDD_LED-_D is clamped to approximately 0.5V. This can cause the brightness of the two hard drive LED indicators on the motherboard and front panel to differ, or even cause one to not illuminate. (Which one is off depends on the voltage drop of the LED itself. Different colored LEDs have different voltage drops. For example, a purple LED has a 3.0V voltage drop, so it may not illuminate in this circuit.) After adding the N-channel dual MOS transistor Q6, because HDD_LED_MOS and HDD_LED-_D will be isolated by the N-channel dual MOS transistor Q6, when the signal HDD_LED-_D is clamped to 0.5V, HDD_LED_MOS- is still 0V because the N-channel dual MOS transistor Q6 is turned on, so the brightness of the two hard disk LED indicators on the motherboard and the front panel are the same.
[0026] In this preferred embodiment, Figure 1 In the example, since the connector JPANEL1 has more than just pins 1 and 3, there are also other pins related to the front panel power indicator and other functions. Figure 1 The relevant functional structure is also included in the circuit diagram, which will not be repeated here.
[0027] In summary, the hard disk indicator light circuit on the computer motherboard of the present invention can simultaneously support the hard disk indicator light on the front panel and the hard disk indicator light on the computer motherboard; there is also a hard disk indicator light on the motherboard, and the status of the hard disk indicator light is consistent with that on the front panel. Even if the customer plugs in the front panel, it will not affect the operation of the hard disk indicator light on the motherboard.
[0028] As described above, for ordinary technicians in this field, various other corresponding changes and modifications can be made according to the technical solution and technical concept of the utility model, and all these changes and modifications should fall within the scope of protection of the claims attached to the utility model.
Claims
1. A hard disk indicator light circuit on a computer motherboard, characterized in that: include: A connector for establishing an electrical connection between a mainboard and a front panel, a mainboard hard disk indication LED, diodes (D1, D3), an N-channel dual MOS transistor (Q6), a first resistor (R2), a second resistor (R2527), and a third resistor (R252); a hard disk status signal reflecting the working status of the hard disk on the mainboard is input into the cathode of the diodes (D1, D3), the anodes of the diodes (D1, D3) are electrically connected to a first circuit node, the first circuit node is electrically connected to a first power supply (P3V3) on the mainboard via a first resistor (R2), and the hard disk status signal is 0V when the hard disk is working normally; the N-channel dual MOS transistor (Q6) includes a first MOS transistor and a second MOS transistor; the gate of the first MOS transistor is electrically connected to the first circuit node, the source is grounded, and the drain is connected via a second circuit node. The resistor (R2527) is electrically connected to the 3.3V standby power supply (P3V3SB) on the motherboard; the gate of the second MOS tube is electrically connected to the 3.3V standby power supply (P3V3SB) on the motherboard via the second resistor (R2527), the source is grounded, and the drain is electrically connected to the second circuit node; the pin on the connector for electrically connecting the anode of the hard disk indicator LED on the front panel is electrically connected to the second power supply (P5V) on the motherboard, the pin on the connector for electrically connecting the cathode of the hard disk indicator LED on the front panel is electrically connected to the second circuit node, and the second circuit node is electrically connected to the 3.3V standby power supply (P3V3SB) on the motherboard via the third resistor (R252); the anode of the hard disk indicator LED on the motherboard is electrically connected to the second power supply (P5V), and the cathode is electrically connected to the second circuit node.
2. The hard disk indicator light circuit on a computer motherboard as claimed in claim 1, wherein: The model of the motherboard hard drive indicator LED is LUEAG30640-H221.
3. The hard disk indicator light circuit on a computer motherboard as claimed in claim 1, wherein: The diodes (D1, D3) include a first diode (D1) and a second diode (D3); the hard disk status signal includes a first hard disk status signal and a second hard disk status signal; the first hard disk status signal is input into the cathode of the first diode (D1), and the anode of the first diode (D1) is electrically connected to the first circuit node; the second hard disk status signal is input into the cathode of the second diode (D3), and the anode of the second diode (D3) is electrically connected to the first circuit node.
4. The hard disk indicator light circuit on a computer motherboard as claimed in claim 1, wherein: The diode (D1, D3) is of type LBAT54HT1G.
5. The hard disk indicator light circuit on a computer mainboard as claimed in claim 4, characterized in that: The model of the N-channel dual MOS transistor (Q6) is L2N7002DW1T1G.
6. The hard disk indicator light circuit on a computer mainboard as claimed in claim 5, characterized in that: The resistance of the first resistor (R2) is 4.7 kilo-ohms.
7. The hard disk indicator light circuit on a computer mainboard as claimed in claim 5, characterized in that: The resistance of the second resistor (R2527) is 10 kilo-ohms.
8. The hard disk indicator light circuit on a computer mainboard as claimed in claim 5, characterized in that: The resistance of the third resistor (R252) is 10 kilo-ohms.
9. The hard disk indicator light circuit on a computer mainboard as claimed in claim 5, characterized in that: The first power supply (P3V3) is a 3.3V power supply.
10. The hard disk indicator light circuit on a computer mainboard as claimed in claim 5, characterized in that: The second power supply (P5V) is a 5V power supply.