CN204465493U - A kind of timing circuit - Google Patents

Abstract

The utility model discloses a kind of timing circuit, comprise rectifier bridge Q1, resistance R, light-emitting diode D2 and controllable silicon D4.The electronic component that the utility model timing circuit uses is less and do not use any chip component, make the antijamming capability of circuit very strong, the price of electronic component used in addition is all very cheap, not only control cost and volume greatly in this way, and the customization time that can be random, be applicable to promoting the use of.

Description

A kind of timing circuit

Technical field

The utility model relates to a kind of timer circuit, specifically a kind of timing 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, these electrical equipment are all generally that price is high, and volume is comparatively large, how to optimize timing circuit, make its miniaturization, cheap, become a large research direction of Ge great electrical equipment manufacturer.

Utility model content

The purpose of this utility model is to provide a kind of easy timing circuit, 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 circuit, comprise rectifier bridge Q1, resistance R, light-emitting diode D2 and controllable silicon D4, described rectifier bridge Q1 port 4 connects relay J contact switch J-1 and 220V AC power respectively, rectifier bridge Q1 port 2 connects the relay J contact switch J-1 other end respectively, resistance R and transformer T primary coil, the transformer T primary coil other end is connecting circuit RL and the 220V AC power other end respectively, the electrical equipment RL other end contact resistance R other end, described rectifier bridge Q1 port one connects the A pole of controllable silicon D1, the K pole of controllable silicon D1 connects rectifier bridge Q1 port 3 respectively, loud speaker B and electronic watch alarm signal input a end, the loud speaker B other end connects G pole and the electronic watch alarm signal input b end of controllable silicon D1 respectively, described transformer T secondary coil two ends connect rectifier bridge Q2 port one and rectifier bridge Q2 port 3 respectively, rectifier bridge Q2 port 4 connects relay J coil respectively, electric capacity C1, light-emitting diode D2 negative pole, electric capacity C2, the K pole of electric capacity C3 and controllable silicon D4, the described relay J coil other end connects fuse FR respectively, resistance R1, diode D5 negative pole, the A pole of triode VT collector electrode and controllable silicon D4, the described fuse FR other end connects the electric capacity C1 other end and rectifier bridge Q2 port 2 respectively, described resistance R1 other end connecting luminous diode D2 positive pole, described diode D5 positive pole connects the electric capacity C2 other end respectively, potentiometer RP and triode VT base stage, the potentiometer RP other end is contact resistance R2 respectively, potentiometer RP is sliding, the A pole of triode VT collector electrode and controllable silicon D4, described triode VT emitter connects diode D3 negative pole, diode D3 positive pole connects the electric capacity C3 other end respectively, the G pole of the resistance R2 other end and controllable silicon D4.

Compared with prior art, the beneficial effects of the utility model are: the electronic component that the utility model timing circuit uses is less and do not use any chip component, make the antijamming capability of circuit very strong, the price of electronic component used in addition is all very cheap, not only control cost and volume greatly in this way, and the customization time that can be random, be applicable to promoting the use of.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of timing 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 circuit, comprise rectifier bridge Q1, resistance R, light-emitting diode D2 and controllable silicon D4, rectifier bridge Q1 port 4 connects relay J contact switch J-1 and 220V AC power respectively, rectifier bridge Q1 port 2 connects the relay J contact switch J-1 other end respectively, resistance R and transformer T primary coil, the transformer T primary coil other end is connecting circuit RL and the 220V AC power other end respectively, the electrical equipment RL other end contact resistance R other end, rectifier bridge Q1 port one connects the A pole of controllable silicon D1, the K pole of controllable silicon D1 connects rectifier bridge Q1 port 3 respectively, loud speaker B and electronic watch alarm signal input a end, the loud speaker B other end connects G pole and the electronic watch alarm signal input b end of controllable silicon D1 respectively, transformer T secondary coil two ends connect rectifier bridge Q2 port one and rectifier bridge Q2 port 3 respectively, rectifier bridge Q2 port 4 connects relay J coil respectively, electric capacity C1, light-emitting diode D2 negative pole, electric capacity C2, the K pole of electric capacity C3 and controllable silicon D4, the relay J coil other end connects fuse FR respectively, resistance R1, diode D5 negative pole, the A pole of triode VT collector electrode and controllable silicon D4, the fuse FR other end connects the electric capacity C1 other end and rectifier bridge Q2 port 2 respectively, resistance R1 other end connecting luminous diode D2 positive pole, diode D5 positive pole connects the electric capacity C2 other end respectively, potentiometer RP and triode VT base stage, the potentiometer RP other end is contact resistance R2 respectively, potentiometer RP is sliding, the A pole of triode VT collector electrode and controllable silicon D4, triode VT emitter connects diode D3 negative pole, diode D3 positive pole connects the electric capacity C3 other end respectively, the G pole of the resistance R2 other end and controllable silicon D4.

Operation principle of the present utility model is: in FIG, open the switch of electrical equipment RL, this state is standby preparation using state, when this state, when inputting without ringing signal voltage when between electronic watch alarm signal input a end and electronic watch alarm signal input b tip node, controllable silicon D1 triggerless voltage and end not conducting, therefore rectifier bridge Q1 no current passes through, be in off state, another circuit is due to the electric shock K switch of relay J, normally open is in without operating voltage situation, therefore this circuit also no current pass through, such electrical equipment RL two ends Non voltage output, electrical equipment RL does not work, resistance R plays the effect of protective device, when you after electrical work time of selecting arrives, what play a crucial role to circuit is the alarm signal of electronic watch, the interrupted bell signal audio voltage in ring tone loud speaker B two ends is added between the G pole of controllable silicon D1 and K pole, make controllable silicon D1 Discontinuous Conduction, such rectifier bridge Q1 Discontinuous Conduction, so transformer T obtains alternating current 220V voltage intermittently, this interrupted electric flux is through transformer T transformation, the coil two ends that 12V direct current is also added in relay J are intermittently become after rectifier bridge Q2 rectification and electric capacity C1 filtering, thus relay J starts work instantaneously in controllable silicon D1 first time conducting, relay contact switch J-1 is made to close conducting, such transformer T obtains the stable alternating voltage that relay contact switch J-1 sends here, this stable alternating voltage maintains again the stable of the operating voltage of relay J further, electric current is made to form self-locking benign cycle, electrical equipment RL also obtains stable alternating current 220V voltage by closed relay contact switch J-1 from 220V AC power, start automatic operation.

After electrical equipment RL works certain hour, the autostop moment arrives.In order to make electrical equipment RL quit work, make controllable silicon D4 automatically in scheduled time conducting, the operating voltage of short-circuit relay J, relay J contact switch J-1 is opened, the power supply of the whole circuit of instantaneous trip, the operating voltage of short-circuit relay J, namely means the secondary coil voltage of short circuit transformer T.Because whole circuit is instantaneous trip, the power of transformer T is very little again, so the secondary coil of the T of short circuit transformer is safe concerning transformer T and circuit element.At this simultaneously, relay J has cut off the voltage of electrical equipment RL in the lump, and electrical equipment RL quits work, and whole circuit is restored to the original state, waits for the arrival of alarm signal voltage next time.

Claims (1)

1. a timing circuit, comprise rectifier bridge Q1, resistance R, light-emitting diode D2 and controllable silicon D4, it is characterized in that, described rectifier bridge Q1 port 4 connects relay J contact switch J-1 and 220V AC power respectively, rectifier bridge Q1 port 2 connects the relay J contact switch J-1 other end respectively, resistance R and transformer T primary coil, the transformer T primary coil other end is connecting circuit RL and the 220V AC power other end respectively, the electrical equipment RL other end contact resistance R other end, described rectifier bridge Q1 port one connects the A pole of controllable silicon D1, the K pole of controllable silicon D1 connects rectifier bridge Q1 port 3 respectively, loud speaker B and electronic watch alarm signal input a end, the loud speaker B other end connects G pole and the electronic watch alarm signal input b end of controllable silicon D1 respectively, described transformer T secondary coil two ends connect rectifier bridge Q2 port one and rectifier bridge Q2 port 3 respectively, rectifier bridge Q2 port 4 connects relay J coil respectively, electric capacity C1, light-emitting diode D2 negative pole, electric capacity C2, the K pole of electric capacity C3 and controllable silicon D4, the described relay J coil other end connects fuse FR respectively, resistance R1, diode D5 negative pole, the A pole of triode VT collector electrode and controllable silicon D4, the described fuse FR other end connects the electric capacity C1 other end and rectifier bridge Q2 port 2 respectively, described resistance R1 other end connecting luminous diode D2 positive pole, described diode D5 positive pole connects the electric capacity C2 other end respectively, potentiometer RP and triode VT base stage, the potentiometer RP other end is contact resistance R2 respectively, potentiometer RP is sliding, the A pole of triode VT collector electrode and controllable silicon D4, described triode VT emitter connects diode D3 negative pole, diode D3 positive pole connects the electric capacity C3 other end respectively, the G pole of the resistance R2 other end and controllable silicon D4.