Voltage detection indicating circuit
A technology for indicating circuit and voltage detection, applied in the direction of measuring current/voltage, measuring device, measuring electrical variables, etc., can solve the problem of wrongly indicating the normal state of VIN power supply, achieve high detection and indication accuracy, simple circuit structure, and improve accuracy Effect
Inactive Publication Date: 2014-03-26
GUANGDONG VTRON TECH CO LTD
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, usually the forward conduction voltage of the LED light-emitting diode is lower than the power supply value of VIN, so when the voltage value of VIN is lower than the voltage required by the subsequent circuit, figure 1 The LED light-emitting diode in the LED will also illuminate normally, thus falsely indicating that the VIN power supply is in a normal state
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0021] Such as figure 2 As shown, a voltage detection and indicating circuit in this specific embodiment includes a light-emitting diode LED, and also includes a first current-limiting resistor R5, a second current-limiting resistor R6, a resistor R1, a resistor R2 and a shunt regulator U1, and the power supply voltage VIN is connected to the anode of the light-emitting diode LED, the cathode of the light-emitting diode LED is connected to one end of the second current limiting resistor R6, and the other end of the second current limiting resistor R6 is connected to the cathode of the shunt regulator U1 (ie figure 2 The third end of U1 shown); one end of the first current limiting resistor R5 is connected to the power supply voltage VIN, and the other end of the first current limiting resistor R5 is connected to the cathode of the shunt regulator U1; one end of the resistor R1 is connected to the power supply voltage VIN, and the resistor R1 The other end is connected in ser...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a voltage detection indicating circuit. The voltage detection indicating circuit comprises a light emitting diode, a first current limiting resistor R5, a second current limiting resistor R6, a resistor R1, a resistor R2 and a shunting voltage regulator U1, wherein a power source voltage is connected to the anode of the light emitting diode; the cathode of the light emitting diode is connected to one end of the second current limiting resistor R6; the other end of the second current limiting resistor R6 is connected to the cathode of the shunting voltage regulator U1; one end of the first current limiting resistor R5 is connected to the power source voltage; the other end of the first current limiting resistor R5 is connected to the cathode of the shunting voltage regulator U1; one end of the resistor R1 is connected to the power source voltage; the other end of the resistor R1 is connected in series with one end of the resistor R2; the other end of the resistor R2 is grounded; a reference electrode of the shunting voltage regulator U1 is connected between the resistor R1 and the resistor R2; the anode of the shunting voltage regulator is grounded. The voltage detection indicating circuit can solve the situation that the light emitting diode indicates a voltage state wrongly when the power source voltage is lower than a positive conducting voltage of the light emitting diode.
Description
technical field [0001] The present invention relates to the field of voltage detection, and more specifically, to a voltage detection indicating circuit. Background technique [0002] In the hardware board design of all electronic products, power supply is required, and the state of the power supply voltage determines whether the board can work normally. Usually, it is necessary to monitor the important power supply voltage in the board and indicate it through LED light-emitting diodes. [0003] In the existing hardware single board design, such as figure 1 As shown, a resistor R is usually connected in series with an LED light-emitting diode to form a detection and indication circuit. When the VIN voltage is greater than or equal to the forward conduction voltage of the LED light-emitting diode, the LED diode lights up to indicate that the VIN voltage is normal, otherwise, the LED light-emitting diode does not light up to indicate that the VIN voltage is abnormal. However...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165
Inventor 周冬生聂永智黄威
Owner GUANGDONG VTRON TECH CO LTD