CN103078513A - Single-battery boosting circuit of universal meter - Google Patents
Single-battery boosting circuit of universal meter Download PDFInfo
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- CN103078513A CN103078513A CN 201310025843 CN201310025843A CN103078513A CN 103078513 A CN103078513 A CN 103078513A CN 201310025843 CN201310025843 CN 201310025843 CN 201310025843 A CN201310025843 A CN 201310025843A CN 103078513 A CN103078513 A CN 103078513A
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Abstract
The invention provides a single-battery boosting circuit of a universal meter. The single-battery boosting circuit is technically characterized by comprising a 1.5V battery, a complementary multi-resonant oscillating circuit, an oscillating-frequency adjusting circuit, a negative feedback frequency-stabilizing circuit, a boosting circuit, a rectifying and filtering voltage-stabilizing circuit and a 15V direct-current power output terminal. The universal meter is a necessary measuring tool for electricians and electronic technicians, and a 9V, 15V or 22.5V laminated cell is commonly used for measuring the high resistance of a resistor. The laminated cell not only is higher in price, but also is very short in service life, and needs to be replaced frequently. The single-battery boosting circuit provided by the invention is suitable for a small direct-current booster used by various pointer type universal meters. The embodiment of the invention preferably adopts 15V voltage outputted by the boosting circuit. The single-battery boosting circuit provided by the invention is simple in circuit structure and fewer in used components, and a boosting circuit board can be directly arranged at the position of the original laminated battery in the pointer type universal meter.
Description
Technical field
The invention belongs to the application of electronic technology field, is about a kind of universal instrument single battery booster circuit.
Background technology
Universal instrument is electrician, electronic technology worker's indispensable survey tool, and the height of its measuring resistance stops the laminated cell of common use 9V, a 15V or 22.5V.This laminated cell not only price is higher, and useful life is short especially, needs often to change.Universal instrument single battery booster circuit of the present invention is fit to the small-sized DC stepup transformer that various pointer multimeters use, the embodiment of the invention is take booster circuit output 15V as example, this universal instrument single battery booster circuit have circuit structure simple, use components and parts few, the booster circuit plate can directly place the position of pointer multimeter Central Plains laminated cell.
Below describe universal instrument single battery booster circuit of the present invention related relevant technologies content in implementation process in detail.
Summary of the invention
Goal of the invention and beneficial effect: universal instrument is electrician, electronic technology worker's indispensable survey tool, and the height of its measuring resistance stops the laminated cell of common use 9V, a 15V or 22.5V.This laminated cell not only price is higher, and useful life is short especially, needs often to change.Universal instrument single battery booster circuit of the present invention is fit to the small-sized DC stepup transformer that various pointer multimeters use, the embodiment of the invention is take booster circuit output 15V as example, this universal instrument single battery booster circuit have circuit structure simple, use components and parts few, the booster circuit plate can directly place the position of pointer multimeter Central Plains laminated cell.
The circuit working principle: the circuit of universal instrument single battery booster circuit is comprised of complementary multi-resonant oscillating circuit, booster circuit and rectifying and wave-filtering voltage stabilizing three partial circuits.Circuit is by the 1.5V powered battery in the former pointer multimeter, and operating current is about 20mA, the about 0.5mA of output current, the need of work that the voltage of booster circuit output stops to satisfy the universal instrument height.Booster circuit forms complementary multi-resonant oscillating circuit by NPN type triode VT1, positive-negative-positive triode VT2, and its frequency of oscillation is about 2kHz, and RP is linear potentiometer in the circuit, is used for the frequency of oscillation of regulating complementary multi-resonant oscillating circuit.Step-up transformer primary coil L1 is the load of complementary multi-resonant oscillating circuit, step-up transformer secondary coil L2 is step-up coil, obtain high voltage direct current after exporting higher pulse voltage process switching diode D1 halfwave rectifier and electrochemical capacitor C2 filtering, through output 15V stable DC voltage after current-limiting resistance R3, bleeder resistance R4 and the zener diode DW voltage stabilizing, this booster circuit output voltage can replace the 15V laminated cell again.
Technical characterictic: the universal instrument single battery booster circuit, it comprises 1.5V battery, complementary multi-resonant oscillating circuit and frequency of oscillation regulating circuit, negative feedback frequency stabilization circuit, booster circuit and rectification filtering voltage stabilizing circuit, 15V DC output end, it is characterized in that:
Complementary multi-resonant oscillating circuit and frequency of oscillation regulating circuit: it is by NPN type triode VT1, positive-negative-positive triode VT2, step-up transformer primary coil L1, linear potentiometer RP, resistance R 1, resistance R 2 and capacitor C 1 form, the base stage of NPN type triode VT1 is by the end of resistance R 1 wiring potentiometer RP, the anodal VCC of the other end of linear potentiometer RP and movable end connection circuit thereof, the collector electrode of NPN type triode VT1 connects the base stage of positive-negative-positive triode VT2, the anodal VCC of the emitter connection circuit of positive-negative-positive triode VT2, the collector electrode of positive-negative-positive triode VT2 connects the end of step-up transformer primary coil L1, the other end connection circuit ground GND of step-up transformer primary coil L1;
The negative feedback frequency stabilization circuit: it is comprised of capacitor C 1 and resistance R 2, the base stage of a termination NPN type triode VT1 of capacitor C 1, the end of the other end connecting resistance R2 of capacitor C 1, the collector electrode of another termination positive-negative-positive triode VT2 of resistance R 2;
Booster circuit and rectification filtering voltage stabilizing circuit: it is by step-up transformer secondary coil L2, switching diode D1, electrochemical capacitor C2, resistance R 3, resistance R 4, voltage stabilizing didoe DW becomes with 15V DC output end subgroup, the positive pole of the termination switching diode D1 of step-up transformer secondary coil L2, the negative pole connection circuit ground GND of the other end of step-up transformer secondary coil L2 and electrochemical capacitor C2, the negative pole of switching diode D1 connects the positive pole of electrochemical capacitor C2 and an end of resistance R 3, one end of the other end of resistance R 3 and resistance R 4 and the negative pole of voltage stabilizing didoe DW connect 15V direct current cathode output end, the positive pole of the other end of resistance R 4 and voltage stabilizing didoe DW connects 15V direct current cathode output end, and 15V direct current cathode output end links to each other with circuit ground GND;
1.5V the positive pole of battery links to each other with circuit anode VCC by mains switch SW, the negative pole of 1.5V battery links to each other with circuit ground GND.
Description of drawings
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the invention provides a universal instrument single battery booster circuit.
Embodiment
Fundamental diagram and description of drawings according to universal instrument single battery booster circuit shown in the accompanying drawing 1, and according to the annexation between the components and parts in the described circuit of summary of the invention, and the components and parts technical parameter described in the execution mode requires to implement to realize the present invention.
The selection of components and parts and technical parameter
The embodiment of the invention is take booster circuit output 15V as example:
VT1 is NPN type triode, and the model of selecting is 2SC9013;
VT2 is the positive-negative-positive triode, and the model of selecting is 3AX31;
D1 is switching diode, and selecting model is 1N4148;
DW is voltage stabilizing didoe, and the voltage stabilizing parameter value is 14.5V;
Resistance R 1～R4 all uses fixed carbon resister, and resistance is respectively 20K Ω, 1K Ω, 6.2K Ω, 5.1K Ω;
RP is linear potentiometer, and its resistance is 43K Ω;
C1 is ceramic disc capacitor, and capacity is 1000PF; C2 is electrochemical capacitor, and its capacity is 4.7 μ F/25V;
SW1 is mains switch, selects single-pole single-throw switch (SPST);
1.5V battery can use No. 2 MnZn dry cells of 1 joint.
Circuit production main points, circuit debugging and using method
The 502 type audio output transformer devices that step-up transformer can be used with transistor, former secondary coil is elementary as step-up transformer, and former elementary coil is secondary as step-up transformer, and former elementary coil centre tap is empty need not; If select less than suitable output transformer, the silicon steel sheet of useful transistor output transformer is made, the primary coil diameter is that the high strength enamelled wire of 0.21mm is around 110 circles, secondary with diameter be the high strength enamelled wire of 0.12mm around 420 circles, require lining one deck insulating material between primary coil and the secondary coil;
Adjust the frequency of oscillation that linear potentiometer RP can change complementary multi-resonant oscillating circuit, if when voltage is greater than 18V between switching diode D1 negative pole and 15V direct current cathode output end, can suitably increase the resistance of linear potentiometer RP, or suitably reduce the resistance of resistance R 4;
If at the negative pole of switching diode D1 and the voltage between 15V direct current cathode output end during less than 17V, except the resistance of suitable increase resistance R 4,1 switching diode D1 of interchangeable or use Schottky diode one examination instead, or on electrochemical capacitor C2 directly and connect the electrochemical capacitor of 1 same capability.
Claims (1)
1. universal instrument single battery booster circuit, it comprises 1.5V battery, complementary multi-resonant oscillating circuit and frequency of oscillation regulating circuit, negative feedback frequency stabilization circuit, booster circuit and rectification filtering voltage stabilizing circuit, 15V DC output end, it is characterized in that:
Described complementary multi-resonant oscillating circuit and frequency of oscillation regulating circuit are by NPN type triode VT1, positive-negative-positive triode VT2, step-up transformer primary coil L1, linear potentiometer RP, resistance R 1, resistance R 2 and capacitor C 1 form, the base stage of NPN type triode VT1 is by the end of resistance R 1 wiring potentiometer RP, the anodal VCC of the other end of linear potentiometer RP and movable end connection circuit thereof, the collector electrode of NPN type triode VT1 connects the base stage of positive-negative-positive triode VT2, the anodal VCC of the emitter connection circuit of positive-negative-positive triode VT2, the collector electrode of positive-negative-positive triode VT2 connects the end of step-up transformer primary coil L1, the other end connection circuit ground GND of step-up transformer primary coil L1;
Described negative feedback frequency stabilization circuit is comprised of capacitor C 1 and resistance R 2, the base stage of a termination NPN type triode VT1 of capacitor C 1, the end of the other end connecting resistance R2 of capacitor C 1, the collector electrode of another termination positive-negative-positive triode VT2 of resistance R 2;
Described booster circuit and rectification filtering voltage stabilizing circuit are by step-up transformer secondary coil L2, switching diode D1, electrochemical capacitor C2, resistance R 3, resistance R 4, voltage stabilizing didoe DW becomes with 15V DC output end subgroup, the positive pole of the termination switching diode D1 of step-up transformer secondary coil L2, the negative pole connection circuit ground GND of the other end of step-up transformer secondary coil L2 and electrochemical capacitor C2, the negative pole of switching diode D1 connects the positive pole of electrochemical capacitor C2 and an end of resistance R 3, one end of the other end of resistance R 3 and resistance R 4 and the negative pole of voltage stabilizing didoe DW connect 15V direct current cathode output end, the positive pole of the other end of resistance R 4 and voltage stabilizing didoe DW connects 15V direct current cathode output end, and 15V direct current cathode output end links to each other with circuit ground GND;
The positive pole of described 1.5V battery links to each other with circuit anode VCC by mains switch SW, and the negative pole of 1.5V battery links to each other with circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310025843 CN103078513A (en) | 2013-01-24 | 2013-01-24 | Single-battery boosting circuit of universal meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310025843 CN103078513A (en) | 2013-01-24 | 2013-01-24 | Single-battery boosting circuit of universal meter |
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| Publication Number | Publication Date |
|---|---|
| CN103078513A true CN103078513A (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310025843 Withdrawn CN103078513A (en) | 2013-01-24 | 2013-01-24 | Single-battery boosting circuit of universal meter |
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| CN (1) | CN103078513A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103391673A (en) * | 2013-08-20 | 2013-11-13 | 吴建堂 | Boosted type LED flashlight provided with one battery |
| CN103560684A (en) * | 2013-10-27 | 2014-02-05 | 李诚德 | Energy-saving electronic battery |
-
2013
- 2013-01-24 CN CN 201310025843 patent/CN103078513A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103391673A (en) * | 2013-08-20 | 2013-11-13 | 吴建堂 | Boosted type LED flashlight provided with one battery |
| CN103560684A (en) * | 2013-10-27 | 2014-02-05 | 李诚德 | Energy-saving electronic battery |
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Application publication date: 20130501 |