CN105955007A

CN105955007A - Touch type electronic timer for kitchen

Info

Publication number: CN105955007A
Application number: CN201610474820.3A
Authority: CN
Inventors: 吴圣铎
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-06-26
Filing date: 2016-06-26
Publication date: 2016-09-21

Abstract

The invention provides a touch type electronic timer for a kitchen. The timer is characterized by comprising a 9V DC power source, a touch electrode and voltage-dividing circuit and monostable timing circuit, and a level reserve phase and buzzer driving circuit, wherein the touch electrode and voltage-dividing circuit and monostable timing circuit is composed of a touch electrode MO, a resistor R1, a resistor R2, a double-D trigger IC1, a linear potentiometer RP and an electrolytic capacitor C1, and the double-D trigger IC1 employs a model of CD4013. For the purpose of effectively solving the actual problem existing in timing by use of an electronic mode, the one double-D trigger is taken as a core element and is connected to form the monostable timing circuit, only a small amount of components are used at a periphery, and thus the technical problem of fast operation during use is realized.

Description

Touch type electronic intervalometer for kitchen use

Technical field

The invention belongs to application of electronic technology field, relate to a kind of touch type electronic intervalometer 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 that use is easy to operate. Its defect is: the most not accurate enough, and time of fire alarming is short and alarm sound is smaller.Electronically intervalometer Advantage: 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 be need use battery be its power supply；Three is that when using, operation is the most convenient and swift.

In order to effectively solve the practical problem that electronically timing exists, the present invention uses 1 double D trigger As core parts, and being connected into mono-stable timing circuit, periphery only uses a small amount of components and parts, i.e. realizes Technical problem swift to operate when using.

Touch type electronic intervalometer for kitchen use of the present invention described further below is involved in implementation process Necessity, guardian technique content.

Summary of the invention

Goal of the invention and beneficial effect: in order to effectively solve the practical problem that electronically timing exists, this 1 double D trigger of bright employing is as core parts, and is connected into mono-stable timing circuit, and periphery only makes Use a small amount of components and parts, i.e. achieve technical problem swift to operate during use.

Circuit operation principle: touch type electronic intervalometer for kitchen use uses double D trigger IC1, uses CMOS The model of digital integrated electronic circuit is CD4013, and it is fixed that circuit is only connected into monostable with wherein 1 d type flip flop Time circuit.When stable state, the 1st foot output low level of double D trigger IC1, touch when staff touches When touching electrode MO, the induced voltage of human body is through resistance R1, resistance R2 dividing potential drop, and its positive half cycle makes monostable fixed Time timing circuit upset, double D trigger IC1 the 1st foot output high level, at high period chien shih NPN Transistor npn npn VT1 turns on, and enhancement mode N-channel field effect transistor VT2 then for ending, makes buzzer HA without electricity not Work；

The 1st foot output high level of double D trigger IC1 delays to electrochemical capacitor C1 through linear potentiometer RP Charging battery, makes the 4th foot level of double D trigger IC1 gradually rise until transient state terminates, and circuit upset is Stable state, the 1st foot of double D trigger IC1 is sported low level by high level, then NPN transistor VT1 Being rapidly gone to cut-off by conducting, at this moment enhancement mode N-channel field effect transistor VT2 turns on rapidly and drives buzzer HA pipes.

Technical scheme: touch type electronic intervalometer for kitchen use, it includes 9V DC source pressure, touch electrode and divides Volt circuit and mono-stable timing circuit, level paraphase and buzzer drive circuit, it is characterised in that:

Touch electrode and bleeder circuit and mono-stable timing circuit: it is by touch electrode MO, resistance R1, resistance R2, double D trigger IC1, linear potentiometer RP and electrochemical capacitor C1 composition, double D trigger IC1 uses Model is CD4013, one end of the 3rd foot connecting resistance R1 of double D trigger IC1 and one end of resistance R2, The other end of resistance R1 connects the other end connection circuit ground GND of touch electrode MO, resistance R2, double D trigger 5th foot of IC1 and the 14th foot connection circuit positive pole VCC, the 6th foot of double D trigger IC1 and the 7th foot Connection circuit ground GND, the 1st foot of double D trigger IC1 connects one end of linear potentiometer RP, double D trigger 4th foot of IC1 connects the positive pole of electrochemical capacitor C1 and the other end of linear potentiometer RP and movable end thereof, electrolysis The negative pole connection circuit ground GND of electric capacity C1；

Level paraphase and buzzer drive circuit: it is by resistance R3, NPN transistor VT1, enhancement mode N ditch Road field effect transistor VT2, resistance R4 and buzzer HA composition, the base stage of NPN transistor VT1 passes through resistance R3 connects the 1st foot of double D trigger IC1, and the colelctor electrode of NPN transistor VT1 passes through resistance R4 connection circuit Positive pole VCC, the colelctor electrode of NPN transistor VT1 connects the grid of enhancement mode N-channel field effect transistor VT2, increases The drain electrode connection circuit positive pole VCC of strong type N-channel field effect transistor VT2, enhancement mode N-channel field effect transistor VT2 Source electrode connects the positive pole of buzzer HA, the negative pole connection circuit ground GND of buzzer HA；

The positive pole of 9V DC source is connected with circuit anode VCC, the negative pole connection circuit ground GND of 9V DC source.

Accompanying drawing explanation

Accompanying drawing 1 is that the circuit work of one embodiment of touch type electronic intervalometer for kitchen use that the present invention provides is former Reason figure.

Detailed description of the invention

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

The technical parameter of components and parts and selection requirement thereof

IC1 is double D trigger, and using model is CD4013CMOS digital integrated electronic circuit, the circuit of the present invention In only use its one, another d type flip flop is vacant；

The resistance of linear potentiometer RP is 3.2M Ω；

The resistance of resistance R1 is 4.3M Ω；The resistance of resistance R2 is 2M Ω；Resistance R3 resistance is 22K Ω； The resistance of resistance R4 is 16K Ω；

C1 is electrochemical capacitor, and its capacity is 330 μ F/25V；

VT1 is NPN transistor, and the model of selection is 2SC9013, it is desirable to amplification β >=120；

VT2 is enhancement mode N-channel field effect transistor, and the model of selection is IRFZ22；

HA is buzzer, selects the internal buzzer having audio generating circuit, and direct-current working volts are 9V；

MO is touch electrode, selects 10mm × 10mm metallic copper leather to make.

Circuit production main points, circuit debugging and using method

Because the circuit structure of touch type electronic intervalometer for kitchen use is fairly simple, as long as generally select Electronic devices and components performance is intact, and the components and parts annexation in accompanying drawing 1 is welded to specifications, thing Reason connecting line and welding quality are after going through correctly, and the circuit of the present invention has only to carry out simply Ground debugging can normally work；

Touch electrode MO uses metallic copper leather to make, and the lead-in wire connecting touch electrode MO is unsuitable oversize, otherwise Lead-in wire easily senses AC signal and misoperation occurs；

The delay time of touch type electronic intervalometer for kitchen use is mainly by linear potentiometer RP or electrochemical capacitor C1 Numerical value determine, be about 30 minutes according to the data of embodiment；

If increasing or shortening delay time, can increase or reduce linear potentiometer RP's and electrochemical capacitor C1 Numerical value.

The circuit structure design of the present invention, components' placement, and its architectural feature, face shaping and chi Very little sizes etc. are not the key technology of the present invention, are not claimed guardian technique content, Because not affecting the realization of specific implementation process of the present invention and goal of the invention, therefore illustrate the most one by one.

Claims

1. a touch type electronic intervalometer for kitchen use, it includes 9V DC source, touch electrode and dividing potential drop Circuit and mono-stable timing circuit, level paraphase and buzzer drive circuit, it is characterised in that:

Described touch electrode and bleeder circuit and mono-stable timing circuit are by touch electrode MO, resistance R1, electricity Resistance R2, double D trigger IC1, linear potentiometer RP and electrochemical capacitor C1 composition, double D trigger IC1 Employing model is CD4013, one end and the one of resistance R2 of the 3rd foot connecting resistance R1 of double D trigger IC1 End, the other end of resistance R1 meets the other end connection circuit ground GND, double D of touch electrode MO, resistance R2 and touches Send out the 5th foot of device IC1 and the 6th foot of the 14th foot connection circuit positive pole VCC, double D trigger IC1 and the 7 foot connection circuit ground GND, the 1st foot of double D trigger IC1 connects one end of linear potentiometer RP, and double D touch The 4th foot sending out device IC1 connects the positive pole of electrochemical capacitor C1 and the other end of linear potentiometer RP and movable end thereof, The negative pole connection circuit ground GND of electrochemical capacitor C1；

Described level paraphase and buzzer drive circuit are by resistance R3, NPN transistor VT1, enhancement mode N Channel field-effect pipe VT2, resistance R4 and buzzer HA composition, the base stage of NPN transistor VT1 is by electricity Resistance R3 connects the 1st foot of double D trigger IC1, and the colelctor electrode of NPN transistor VT1 connects electricity by resistance R4 Road positive pole VCC, the colelctor electrode of NPN transistor VT1 connects the grid of enhancement mode N-channel field effect transistor VT2, The drain electrode connection circuit positive pole VCC of enhancement mode N-channel field effect transistor VT2, enhancement mode N-channel field effect transistor VT2 Source electrode connect the positive pole of buzzer HA, the negative pole connection circuit ground GND of buzzer HA；

The positive pole of described 9V DC source is connected with circuit anode VCC, the negative pole connection circuit of 9V DC source Ground GND.