CN104217830A - Simple and reliable numerical control resistance box - Google Patents
Simple and reliable numerical control resistance box Download PDFInfo
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- CN104217830A CN104217830A CN201410437162.1A CN201410437162A CN104217830A CN 104217830 A CN104217830 A CN 104217830A CN 201410437162 A CN201410437162 A CN 201410437162A CN 104217830 A CN104217830 A CN 104217830A
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- circuit
- resistance
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- reliable
- decoding output
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Abstract
The invention discloses a simple and reliable numerical control resistance box. A clock pulse signal is in wireless connection with decoding output of a counter circuit; the decoding output of the counter circuit is connected with a diode network and an LED indicator lamp; the diode network and the LED indicator lamp are connected with an in-phase/reverse-phase driving circuit; the in-phase/reverse-phase driving circuit is connected with a switch selection circuit; the switch selection circuit is connected with a precise resistance network; a power supply is used for respectively supplying power to electric equipment. The simple and reliable numerical control resistance box has the beneficial effects that selection of the precise resistance network is achieved through normal reliable integrated chips, so that different resistance values under different demands are obtained, the selection of digital resistance is achieved through a button switch, the operation is reliable, and the cost is low.
Description
Technical field
The present invention relates to a kind of digit-control resistance case, relate in particular to a kind of simple and reliable digit-control resistance case.
Background technology
Traditional resistor case in the market adopts knob structure mostly, and external binding post is easily loosening even to come off, and reading is inconvenient, cannot and computer interface, to user, bring inconvenience.This technology is from practical and can work angle, a kind of design of the resistance box that can continuously change under clock signal is controlled has been proposed, this technology has the feature of simple and reliable practicality, user changes resistance value to the operation of push-button switch continuously, very easy to use, estimate to have a extensive future.
Summary of the invention
The object of the invention is to realize by numerically controlled mode the accurate setting of resistance value, according to different needs,
standard resistance range in resistance integer value arbitrarily can be provided.Certainly, also Standard resistance range can be expanded to if necessary
between five or multidigit more.This technology adopts devices at full hardware circuit to form, and provide luminous tube to indicate, four steric hindrance value adjusted design independently, adopt general Voltaic battery power supply, easy to use, be mainly used in providing the occasion of accurate resistance (and not necessarily nominal value), such as circuit or physics laboratory and other need the occasion of accurately measuring.
The present invention realizes like this, it comprises clock pulse signal, the decoding output of counter circuit, diode network and LED light, homophase/anti-phase drive circuit, switch is selected circuit, precision resistance network, power supply, it is characterized in that: the decoding output of clock pulse signal wireless connections counter circuit, the decoding output of counter circuit connects diode network and LED light, diode network and LED light connect homophase/anti-phase drive circuit, homophase/anti-phase drive circuit connecting valve is selected circuit, switch selects circuit to connect precision resistance network, power supply is given respectively needs electric equipment power supply.
Beneficial effect of the present invention: this circuit utilizes common reliable integrated chip to realize the selection of precision resistance network, thereby the different resistance value while having obtained different needs, by push-button switch, realize the selection of digital resistance, reliable, with low cost.The usefulness of this invention is owing to adopting simple and reliable hardware circuit to form, not only cheap, and easy to use, especially it is worth mentioning that, if slightly changed the push-button switch of pulse signal is provided, clock signal can be provided by other circuit (as computer), by the automatic access of the accurate resistance of very convenient realization, meets the needs of automatic measurement.Therefore, the digit-control resistance case based on this technology can be used as the substitute products of traditional resistor case, and application prospect is good.
Accompanying drawing explanation
Fig. 1 is functional-block diagram of the present invention.
Fig. 2 is control circuit figure of the present invention.
Fig. 3 is resistor network figure of the present invention.
Fig. 4 is the pin winding diagram of main chip of the present invention.
Embodiment
As shown in Figure 1, the present invention realizes like this, the decoding output 2 of clock pulse signal 1 wireless connections counter circuit, the decoding output 2 of counter circuit connects diode network and LED light 3, diode network and LED light 3 connect homophase/anti-phase drive circuit 4, homophase/anti-phase drive circuit 4 connecting valves are selected circuit 5, and switch selects circuit 5 to connect precision resistance network 6, and power supply 7 is given respectively needs electric equipment power supply.
As can be seen from the figure, this circuit main circuit is five modules, specifically comprises one 5 Johnson counters (CD4017), and 10 decoding outputs are provided; A diode network circuit, provides the indicating circuit of light-emitting diode; A four homophases/inverter buffer (CD4041), for the driving of tongue tube; A switch is selected circuit (tongue tube), for selecting the different resistances of resistor network; Also having resistor network, is mainly rationally to be connected and composed by precision resistance.
Control circuit case study on implementation (control of take is example) as shown in Figure 2.As can be seen from the figure, control circuit specifically comprises one 5 Johnson counters (CD4017), diode network, four homophases/anti-phase buffering driver (CD4041) and reed switch circuit.
As can be seen from Figure 2, the INH of CD4017 (Pin13) and CR (Pin15) connect electronegative potential, CP input pulse ripple rising edge along time, can make CD4017 counting, and change successively the output state of Q0-Q9.Four tongue tube adhesives when the output of corresponding CD4017 is low level, such as working as
during for low level, K switch 1 closure, short circuit and its resistance in parallel.
As can be seen from Figure 3, the resistance of resistor network be by
choosing, is to select resistance used forming resistance box, reduces error as far as possible, also will take into account the rated power of resistance simultaneously.Everybody of resistance of take is example, under the effect at control circuit of tongue tube, and switch
,
,
with
various combination, can obtain
between the resistance of arbitrary integer.
For convenience of using, provide the pinouts of respective chip 4017 and 4041 as shown in Figure 4.
Case study on implementation 1: when pressing continuously a position button SB1, in control circuit
during for high level, corresponding luminous tube is lighted, the output of CD4041
with
all will become low level, corresponding switch
with
closure, short circuit and its resistance in parallel, the equivalent resistance of resistor network port is exactly
.Now, luminous tube is lighted and is shown corresponding resistance value, person's reading easy to use.
Claims (1)
1. a simple and reliable digit-control resistance case, it comprises clock pulse signal, the decoding output of counter circuit, diode network and LED light, homophase/anti-phase drive circuit, switch is selected circuit, precision resistance network, power supply, it is characterized in that: the decoding output of clock pulse signal wireless connections counter circuit, the decoding output of counter circuit connects diode network and LED light, diode network and LED light connect homophase/anti-phase drive circuit, homophase/anti-phase drive circuit connecting valve is selected circuit, switch selects circuit to connect precision resistance network, power supply is given respectively needs electric equipment power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410437162.1A CN104217830A (en) | 2014-09-01 | 2014-09-01 | Simple and reliable numerical control resistance box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410437162.1A CN104217830A (en) | 2014-09-01 | 2014-09-01 | Simple and reliable numerical control resistance box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104217830A true CN104217830A (en) | 2014-12-17 |
Family
ID=52099220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410437162.1A Pending CN104217830A (en) | 2014-09-01 | 2014-09-01 | Simple and reliable numerical control resistance box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104217830A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3916327A (en) * | 1973-09-04 | 1975-10-28 | Stephen H Lampen | Output circuit for a voltage-divider device |
| CN1427424A (en) * | 2002-11-01 | 2003-07-02 | 深圳迈瑞生物医疗电子股份有限公司 | Method of high voltage potential meter numerical control resistance value and product |
| CN204045305U (en) * | 2014-09-01 | 2014-12-24 | 江西师范大学 | simple and reliable numerical control resistance box |
-
2014
- 2014-09-01 CN CN201410437162.1A patent/CN104217830A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3916327A (en) * | 1973-09-04 | 1975-10-28 | Stephen H Lampen | Output circuit for a voltage-divider device |
| CN1427424A (en) * | 2002-11-01 | 2003-07-02 | 深圳迈瑞生物医疗电子股份有限公司 | Method of high voltage potential meter numerical control resistance value and product |
| CN204045305U (en) * | 2014-09-01 | 2014-12-24 | 江西师范大学 | simple and reliable numerical control resistance box |
Non-Patent Citations (1)
| Title |
|---|
| 肖景和: "《数字集成电路应用精粹》", 30 June 2002 * |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141217 |
|
| RJ01 | Rejection of invention patent application after publication |