CN207184440U - A kind of photoswitch circuit - Google Patents

Abstract

The utility model discloses a kind of photoswitch circuit, including power rectifier module, application of logic circuit module, optical-electric module, triode module；Electric signal change control logic circuit output is received by changing shading；During shading, receive optical signal and change voltage and make it that logic circuit output be high level, NPN conductings and exported by Vout2 after protective tube and diode protection low, PNP conductings and pass through Vout1 outputs height after protective tube and diode protection；During not shading, logic circuit output is low, and NPN triode is not turned on the Vout2 outputs height after protective tube and diode protection, and it is low that PNP triode is not turned on the Vout1 outputs after protective tube and diode protection.The utility model simplifies structure, effectively reduces cost while requirement is reached.

Description

A kind of photoswitch circuit

Technical field

It the utility model is related to electronic technology field, and in particular to the change-over circuit of a kind of light and electricity.

Background technology

Photoswitch circuit of the prior art is to produce signal to the effect of blocking of light using object, is placed on car roof On may determine that control device residing for Elevator landing.The photoswitch circuit of prior art is positive and negative can not be reversed, reversed power supply Circuit damage can not output signal, flexibility deficiency.

Utility model content

In view of the shortcomings of the prior art, the utility model aims to provide a kind of photoswitch circuit, it is possible to achieve positive and negative to connect Inverted output signal.

To achieve these goals, the utility model adopts the following technical scheme that：

A kind of photoswitch circuit, including power rectifier module, application of logic circuit module, optical-electric module, triode module, institute Stating triode module includes NPN triode and PNP triode；The optical-electric module is connected to the application of logic circuit module and energy The enough output for changing application of logic circuit module by changing light intensity optical-electric module；NPN triode and the PNP triode difference It is connected to the application of logic circuit module and the application of logic circuit module controls the output of the NPN triode and PNP triode； The power rectifier module is application of logic circuit module, optical-electric module and triode module provide power supply；During shading, optical-electric module is defeated Go out high level and make it that application of logic circuit module output be high level, NPN is turned on and defeated by Vout2 after protective tube and diode protection Go out low level, PNP, which is turned on and passed through Vout1 after protective tube and diode protection, exports high level；During not shading, optical-electric module is defeated Go out low level and make it that application of logic circuit module output is low level, NPN triode is not turned on after protective tube and diode protection Vout2 exports high level, and PNP triode is not turned on the Vout1 after protective tube and diode protection and exports low level.

Further, the NPN triode is BCP56, and the PNP triode is BCP53.

The beneficial effects of the utility model are：The utility model is by setting optical-electric module, using by changing light intensity To cause stable output Vout1, Vout2 is low and high level, the logic circuit being made up of No. six phase inverters and XOR gate chip Module causes NPN triode and PNP triode quick response voltage output.When reverse power connection so that the 8th pin of XOR gate Draw high, thus export with power supply just connecing export it is opposite.Rectifier bridge in power rectifier module make it that other power supply signals are constant, then Reverse power connection protection is just played plus diode；When output short-circuit, diode has 30V voltage protection and the 1A electricity of protective tube Stream protection, can input reverse-connection protection and can extension product service life so as to reach.

Brief description of the drawings

Fig. 1 is overall schematic diagram of the present utility model；

Fig. 2 is power rectifier module diagram in Fig. 1；

Fig. 3 is application of logic circuit module schematic diagram in Fig. 1；

Fig. 4 is triode module diagram in Fig. 1.

Embodiment

Below with reference to accompanying drawing, the utility model will be further described, it is necessary to which explanation, following examples are with this Premised on technical scheme, detailed embodiment and specific operating process are given, but the scope of the utility model and unlimited In the present embodiment.

As Figure 1-4, a kind of photoswitch circuit, including power rectifier module, application of logic circuit module, optical-electric module D2, triode module, the triode module includes NPN triode Q4 and PNP triode Q2, the application of logic circuit module are main It is made up of No. six phase inverter U1 and XOR gate chip U4.

When just connecing electric on 24V (i.e. J2 connects positive pole, and J1 connects negative pole), output voltage is provided to each in power rectifier module Chip operation.

During not shading, optical-electric module D2 output low levels, and by electric capacity C5 and resistance R12 from No. six phase inverter U1 (HEF4069) 11 pin input, then exports high level, by resistance R14 and D6 again to 5 by 10 pin of No. six phase inverter U1 Pin input high level, then low level is exported from 6 pin, thereafter by resistance R17, resistance R32 and resistance R18 to XOR gate chip U4 The input 9 of (14070BG).XOR gate chip U4 (14070BG) another pin of input 8 is to connect level by resistance R19 Ground, therefore the pin of output end 10 output low level.This low level is output to NPN triode Q4 (BCP56) control by resistance R22 End processed, so NPN triode Q4 is not turned on, R26 pull-up resistors are drawn high, and are exported by diode D12 and protective tube F2 protection Vout2 is high level, control terminals of the Vout2 by resistance R27 to PNP triode Q2 (BCP53), and PNP triode Q2 is not led It is logical, and it is low level that emitter resistance R30, which is dragged down by diode D10 and protective tube F1 protection output Vout1, D8 red lights folder Between Vout1 and Vout2, the negative electrode of lamp is connected on Vout2, therefore it is that high level red light does not work to export Vout2.

During shading, then with not shading logic on the contrary, No. six phase inverter U1 11 pin output high level, XOR gate chip U4's The output of 10 pin is high level, is turned on by NPN triode Q4 base stages, is low level so as to export Vout2, low level causes PNP triode Q2 is turned on, and Vout1 is that high level red light D8 is bright.

When electric on reversal connection 24V (J2 connects negative pole, and J1 connects positive pole), the XOR gate chip U4 pin of input 8 is high level. During not shading, the XOR gate chip U4 input of pin 9 is low level, and XOR gate chip U4 10 pin export high level, NPN tri- Pole pipe Q4 is turned on, and Vout2 is low level, and PNP triode Q2 conductings, Vout1 is high level, and red light D8 lamps are bright.During shading, XOR Door chip U4 9 pin input is high level, and XOR gate chip U4 10 pin export low level, and NPN triode Q4 is not turned on, Vout2 is high level, and PNP triode Q2 is not turned on, and Vout1 is low level, and D8 lamps do not work.

In the power rectifier module, a rectifier bridge U3 is followed by pressure limiting 30V diode D11, then connecting resistance R10 and Power supply indicator D4, it is followed by three resistance R7, R8, R9 to voltage-stabilized power supply U5 (8H524) 2 pin, voltage-stabilized power supply U5 (8H524) 1 pin output 5V power supplys are followed by two filter capacitors C3 and C6, then connect a small resistor R6 formation analog power and provided to U1 and Q1 Power supply.

For those skilled in the art, technical scheme that can be more than and design, provide various corresponding Change and deformation, and all these change and deformation, should be construed as being included in the utility model claims protection domain it It is interior.

Claims (2)

1. a kind of photoswitch circuit, it is characterised in that including power rectifier module, application of logic circuit module, optical-electric module, three poles Tube module, the triode module include NPN triode and PNP triode；The optical-electric module is connected to the logic circuit Module and the output that application of logic circuit module can be changed by changing light intensity optical-electric module；The NPN triode and PNP Triode is connected to the application of logic circuit module and the application of logic circuit module controls the NPN triode and PNP tri- The output of pole pipe；The power rectifier module is application of logic circuit module, optical-electric module and triode module provide power supply；

During shading, optical-electric module output high level make it that application of logic circuit module output is high level, and NPN triode is turned on and passed through After protective tube and diode protection Vout2 export low level, PNP triode conducting and by protective tube and diode protection after Vout1 exports high level；During not shading, optical-electric module output low level make it that application of logic circuit module output is low level, NPN tri- Pole pipe is not turned on after protective tube and diode protection Vout2 and exports high level, PNP triode be not turned on by protective tube and Vout1 exports low level after diode protection.

2. photoswitch circuit according to claim 1, it is characterised in that the NPN triode is BCP56, the PNP Triode is BCP53.