CN204559534U

CN204559534U - A kind of timing control circuit

Info

Publication number: CN204559534U
Application number: CN201520285044.3U
Authority: CN
Inventors: 刘海明
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-04-28
Filing date: 2015-04-28
Publication date: 2015-08-12
Anticipated expiration: 2025-04-28

Abstract

The utility model discloses a kind of timing control circuit, comprise chip U1, chip U2, resistance R1, resistance R2, potentiometer RP1, diode D1, key switch K, relay J and electric capacity C1, chip U2 pin 4 connects chip U2 pin 8, power supply VCC, diode D2 negative pole and resistance R4, chip U2 pin 6 respectively and connects diode D2 positive pole, resistance R3, electric capacity C2 and key switch K respectively.The utility model timing control circuit adopts two panels NE555, forms the multivibrator without stable state, by regulator potentiometer RP1, can regulate timing, the scope of timing is maximum reaches 13 hours, and circuit structure is simple, cost is low, is applicable to very much promoting the use of.

Description

A kind of timing control circuit

Technical field

The utility model relates to a kind of control circuit, specifically a kind of timing control circuit.

Background technology

Along with the raising of economic development and people's living standard, increasing household electrical appliance start to appear in the life of people, and the miniaturization of electrical equipment, intellectuality become a trend.At present, although a lot of electrical equipment is all with intelligentized functions such as timings, the timing scope of the timing function of a lot of electrical equipment is all very narrow, can not meet the demand of user.

Utility model content

The purpose of this utility model is the timing control circuit providing a kind of adjustable extent wide, to solve the problem proposed in above-mentioned background technology.

For achieving the above object, the utility model provides following technical scheme:

A kind of timing control circuit, comprises chip U1, chip U2, resistance R1, resistance R2, potentiometer RP1, diode D1, key switch K, relay J and electric capacity C1, described chip U2 pin 4 connects chip U2 pin 8 respectively, power supply VCC, diode D2 negative pole and resistance R4, chip U2 pin 6 connects diode D2 positive pole respectively, resistance R3, electric capacity C2 and key switch K, chip U2 pin 1 connects relay J coil respectively, diode D1 positive pole, the key switch K other end, the electric capacity C2 other end, chip U1 pin 1 and electric capacity C1 ground connection, chip U2 pin 3 connects the relay J coil other end and diode D1 negative pole respectively, the described chip U1 pin 3 contact resistance R3 other end, and chip U1 pin 2 connects chip U1 pin 6 respectively, the electric capacity C1 other end and resistance R2, the chip U1 pin 7 respectively contact resistance R2 other end and resistance R1, the resistance R1 other end connects potentiometer RP1, and the potentiometer RP1 other end connects potentiometer RP1 slide plate respectively, chip U1 pin 4, chip U1 pin 8 and the resistance R4 other end.

As the utility model further scheme: described chip U1 and chip U2 model are NE555.

Compared with prior art, the beneficial effects of the utility model are: the utility model timing control circuit adopts two panels NE555, form the multivibrator without stable state, by regulator potentiometer RP1, can regulate timing, the scope of timing is maximum reaches 13 hours, and circuit structure is simple, cost is low, is applicable to very much promoting the use of.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of timing control circuit.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

Refer to Fig. 1, in the utility model embodiment, a kind of timing control circuit, comprises chip U1, chip U2, resistance R1, resistance R2, potentiometer RP1, diode D1, key switch K, relay J and electric capacity C1, chip U2 pin 4 connects chip U2 pin 8 respectively, power supply VCC, diode D2 negative pole and resistance R4, chip U2 pin 6 connects diode D2 positive pole respectively, resistance R3, electric capacity C2 and key switch K, chip U2 pin 1 connects relay J coil respectively, diode D1 positive pole, the key switch K other end, the electric capacity C2 other end, chip U1 pin 1 and electric capacity C1 ground connection, chip U2 pin 3 connects the relay J coil other end and diode D1 negative pole respectively, the chip U1 pin 3 contact resistance R3 other end, and chip U1 pin 2 connects chip U1 pin 6 respectively, the electric capacity C1 other end and resistance R2, the chip U1 pin 7 respectively contact resistance R2 other end and resistance R1, the resistance R1 other end connects potentiometer RP1, and the potentiometer RP1 other end connects potentiometer RP1 slide plate respectively, chip U1 pin 4, chip U1 pin 8 and the resistance R4 other end.

Chip U1 and chip U2 model are NE555.

Operation principle of the present utility model is: refer to Fig. 1, circuit is made up of two pieces of NE555 and a small amount of Resistor-Capacitor Unit, chip U1 and electrical equipment RP1, resistance R1, resistance R2 and electric capacity C1 forms astable multivibrator, cycle of oscillation T=0.693 (RP1+R1+2R2) C1, change by regulating RP1, chip U2 and resistance R3, electric capacity C2 composition is controlled by the delay circuit of chip U1, during start, click key switch K, then electric capacity C2 is shorted, without charge accumulated, the vibration square wave that chip U1 exports is charged to electric capacity C2 by resistance R3, electric discharge, because pulse duty factor is large, therefore each charge and discharge process all can on C2 stored charge, namely on electric capacity C2, voltage can rise, when being charged to 2/3 threshold level exceeding chip U2, chip U2 resets, chip U2 pin 3 is in low level, relay J discharges, timing terminates.

To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.

In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.

Claims

1. a timing control circuit, comprises chip U1, chip U2, resistance R1, resistance R2, potentiometer RP1, diode D1, key switch K, relay J and electric capacity C1, is characterized in that, described chip U2 pin 4 connects chip U2 pin 8 respectively, power supply VCC, diode D2 negative pole and resistance R4, chip U2 pin 6 connects diode D2 positive pole respectively, resistance R3, electric capacity C2 and key switch K, chip U2 pin 1 connects relay J coil respectively, diode D1 positive pole, the key switch K other end, the electric capacity C2 other end, chip U1 pin 1 and electric capacity C1 ground connection, chip U2 pin 3 connects the relay J coil other end and diode D1 negative pole respectively, the described chip U1 pin 3 contact resistance R3 other end, and chip U1 pin 2 connects chip U1 pin 6 respectively, the electric capacity C1 other end and resistance R2, the chip U1 pin 7 respectively contact resistance R2 other end and resistance R1, the resistance R1 other end connects potentiometer RP1, and the potentiometer RP1 other end connects potentiometer RP1 slide plate respectively, chip U1 pin 4, chip U1 pin 8 and the resistance R4 other end.

2. timing control circuit according to claim 1, is characterized in that, described chip U1 and chip U2 model are NE555.