CN105974780A

CN105974780A - Electronic kitchen timer

Info

Publication number: CN105974780A
Application number: CN201610462701.6A
Authority: CN
Inventors: 吴建堂
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-06-22
Filing date: 2016-06-22
Publication date: 2016-09-28

Abstract

The invention relates to an electronic kitchen timer. The electronic kitchen timer is characterized by comprising a 12V DC power source, an oscillator, a frequency divider circuit, a reset circuit and a buzzer alarm and work station indication circuit. Models of the oscillator and a fourteen-level binary frequency divider IC1 of the frequency divider circuit are CD4060. The time-delay time of a time-base circuit for designing and manufacturing a time-delay circuit is not greater than 30 minutes, the use scope of the time-base circuit is greatly limited, for solving a technical problem of long time-delay breakthrough difficulty existing in the time-base circuit, the fourteen-level binary frequency divider and common components are employed in the electronic kitchen timer, a low-capacity capacitor is realized, and so super-long time time-delay, fixed-time random time adjustment and convenient and rapid operation are realized.

Description

Electronic timer for kitchen use

Technical field

The invention belongs to electronic technology field, be about a kind of electronic timer for kitchen use.

Background technology

Intervalometer is commonly used in kitchen mainly two types, and one is mechanically timing；Another kind is to utilize Electronically timing.The advantage of mechanical system intervalometer: one is not use battery；Two is easy for operation. Its defect is: the most not accurate enough, and time of fire alarming is short and sound is smaller.The electronically advantage of intervalometer: One is that timing accuracy is high；Two is that alarm sound is loud and clear.Its defect is: one is that circuit structure is complicated；Two are Needing to use battery is its power supply；Three is that when using, operation is the most convenient and swift.

Generally used time base circuit design making delay circuit delay time can only be within 30 minutes so that Shi Ji The range of circuit is very limited.Long in order to effectively solve not break through time base circuit the most all the time The technical barrier of time delay, electronic timer for kitchen use of the present invention looks for another way, and uses in circuit Ten level Four binary dividers and common components and parts, it is achieved that use low capacity electric capacity, complete ultra-long time and prolong Time, timing arbitrarily adjusts and the technical problem such as convenient to operation.

Electronic timer for kitchen use of the present invention described further below is involved necessary in implementation process , guardian technique content.

Summary of the invention

Goal of the invention and beneficial effect: generally used time base circuit design make delay circuit delay time can only be Within 30 minutes so that the range of time base circuit is very limited.In order to effectively solve all the time All the time not breaking through the technical barrier of time base circuit long delay, electronic timer for kitchen use of the present invention is another Ward off path, use ten level Four binary dividers and common components and parts in circuit, it is achieved that use low capacity Electric capacity, completes ultra-long time time delay, timing and arbitrarily adjusts and the technical problem such as convenient to operation.

Circuit operation principle: electronic timer for kitchen use is with ten level Four binary divider IC1 (CD4060) As core parts, comprising agitator and frequency divider inside it, frequency of oscillation is by external potentiometer RP and electric capacity The parameter of C2 determines.When connecting 12V DC source, the 12nd foot of ten level Four binary divider IC1 is multiple Position, internal oscillator opens and shakes, after ten level Four frequency dividings, by the 3rd of ten level Four binary divider IC1 the Foot output high level, is driven buzzer HA to pipe by high level.After timing reaches, buzzer HA At once piping, duty instruction simultaneously is also lit.When pressing reset switch AN, circuit will restart Timing.

Technical scheme: electronic timer for kitchen use, it includes 12V DC source, agitator and frequency divider Circuit, reset circuit, buzzing warning and working state indicating circuit, it is characterised in that:

Agitator and divider circuit: it by ten level Four binary divider IC1, resistance R2, potentiometer RP, Electric capacity C2 forms, and the model that ten level Four binary divider IC1 select is CD4060, and ten level Four binary systems divide Frequently the 16th foot connection circuit positive pole VCC of device IC1, the 11st foot connecting resistance of ten level Four binary divider IC1 One end of R2, the 10th foot of ten level Four binary divider IC1 connects one end of potentiometer RP, ten level Four two 9th foot of system frequency divider IC1 connects one end of electric capacity C2, and the other end of resistance R2 and potentiometer RP's is another One end and movable end thereof are connected with the other end of electric capacity C2, and the 8th foot of ten level Four binary divider IC1 connects 3rd foot and the 7th foot of circuit ground GND, ten level Four binary divider IC1 connect buzzing warning and duty Indicating circuit；

Reset circuit: it is made up of key switch AN, electric capacity C1, resistance R1, one end of key switch AN With a termination circuit positive pole VCC of electric capacity C1, the 12nd foot of ten level Four binary divider IC1 connects button The switch other end of AN and the other end of electric capacity C1 and one end of resistance R1, another termination electricity of resistance R1 Ground, road GND；

Buzzing warning and working state indicating circuit: it is by buzzer HA, resistance R3 and LED Composition, the 3rd foot of ten level Four binary divider IC1 connects the positive pole of buzzer HA, and buzzer HA's is negative Connection circuit ground, pole GND, the 7th foot of ten level Four binary divider IC1 passes through resistance R3 sending and receiving optical diode The positive pole of LED, the negative pole connection circuit ground GND of LED；

The positive pole connection circuit positive pole VCC of 12V DC source, the negative pole of 12V DC source and circuit ground GND phase Even.

Accompanying drawing explanation

Accompanying drawing 1 is the circuit fundamental diagram of one embodiment of electronic timer for kitchen use that the present invention provides.

Detailed description of the invention

Illustrate according to the electronic timer circuit fundamental diagram for kitchen use shown in accompanying drawing 1 and accompanying drawing, and press According to annexation between components and parts in each several part circuit described in summary of the invention, and described in embodiment Components and parts technical parameter requires and circuit production main points carry out enforcement and can realize the present invention, below in conjunction with enforcement The correlation technique of the present invention is further described by example.

The technical parameter of components and parts and selection requirement thereof

IC1 is ten level Four binary dividers, and the model of selection is CD4060, and packing forms is DIP, total 16 pins；

RP is potentiometer, and the resistance of use is 1.0M Ω (can be according to being actually needed adjustment)；

Resistance R1 resistance is 100K Ω；Resistance R2 resistance is 33K Ω；Resistance R3 resistance is 1.2K Ω；

C1 is electric capacity, and the capacity of use is 0.1 μ F electric capacity of the dacron；C2 is electric capacity, the range of capacity of use It it is 0.1 μ F～0.22 μ F electric capacity of the dacron；

LED is light emitting diode, uses diameter ￠ 5 red light emitting diodes；

AN is key switch, uses common common key-press open in usual to switch；

HA is buzzer, it is desirable to the internal source of sound generation circuit Han electronics of buzzer, its running voltage is 10V.

Circuit production main points, circuit debugging and using method

Because the circuit structure of electronic timer for kitchen use is fairly simple, if the electronics generally selected Components and parts performance is intact, and the components and parts annexation in accompanying drawing 1 is welded to specifications, and physics is even Wiring and welding quality are after going through correctly, and the circuit of the present invention has only to adjust simply Examination can normally work；

Test according to reality: when potentiometer RP value is 510K Ω, electric capacity C2 value be 0.1 μ F, fixed Time the time be about 12 minutes；When potentiometer RP value is 1M Ω, electric capacity C2 value be 0.22 μ F, then Timing was up to 60 minutes；

When actually used, as long as the resistance of you regulator potentiometer RP, i.e. may select timing.

The circuit structure design of the present invention, components' placement, and its face shaping and size etc. thereof It is not the key technology of the present invention, is not claimed guardian technique content, because of not shadow Ring specific implementation process of the present invention and the realization of goal of the invention, therefore illustrate the most one by one.

Claims

1. an electronic timer for kitchen use, it include 12V DC source, agitator and divider circuit, Reset circuit, buzzing warning and working state indicating circuit, it is characterised in that:

Described agitator and divider circuit are by ten level Four binary divider IC1, resistance R2, potentiometer RP, electric capacity C2 form, and the model that ten level Four binary divider IC1 select is CD4060, and ten level Four two are entered The 16th foot connection circuit positive pole VCC of frequency divider IC1 processed, the 11st foot of ten level Four binary divider IC1 connects One end of resistance R2, the 10th foot of ten level Four binary divider IC1 connects one end of potentiometer RP, and 14 9th foot of level binary divider IC1 meets one end of electric capacity C2, the other end of resistance R2 and potentiometer RP The other end and movable end be connected with the other end of electric capacity C2, the 8th of ten level Four binary divider IC1 Foot connection circuit ground GND, the 3rd foot of ten level Four binary divider IC1 and the 7th foot connect buzzing and report to the police and work Condition indication circuit；

Described reset circuit is made up of key switch AN, electric capacity C1, resistance R1, the one of key switch AN End and the termination circuit positive pole VCC of electric capacity C1, the 12nd foot of ten level Four binary divider IC1 connect by The other end of key switch AN and the other end of electric capacity C1 and one end of resistance R1, another termination of resistance R1 Circuit ground GND；

Described buzzing warning and working state indicating circuit are by buzzer HA, resistance R3 and light emitting diode LED forms, and the 3rd foot of ten level Four binary divider IC1 connects the positive pole of buzzer HA, buzzer HA's Negative pole connection circuit ground GND, the 7th foot of ten level Four binary divider IC1 connects light-emitting diodes by resistance R3 The positive pole of pipe LED, the negative pole connection circuit ground GND of LED；

The positive pole connection circuit positive pole VCC of described 12V DC source, the negative pole of 12V DC source and circuit ground GND is connected.