Control Circuit

The circuit of technology in ISO102／106 dealing with analog and digital common terminal

Published:2011/8/30 1:37:00 Author:Jessie | Keyword: analog common terminal, digital common terminal

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Slotted tip control photoelectric control circuit

Published:2011/12/1 1:09:00 Author:May | Keyword: Slotted tip control, photoelectric control

Usually, 2CU2B photosensitive diode shuts out light source by slitting carborundum discs tomake relay failure to actuate. But, when slitting carborundum discs is open byseveralor tens of nib ( the number depends on the quality of carborundum discs) , carborundum discs arefret, when itaborts nib, it can not shut out light source ( about 1mm), because 2CU2B has light, it can generate 5~10µA light curret to makeB1, BG2 compositive clad pipe breakover, Schmidt trigger output negative impulse, monostable circuit output positive impulse and BG7 breakover, execution relay action. Then it can drive middle relay and miniature solenoid close once, and theclosed time depends on monostable delay circuit. After slitting carborundum discs shut out light source again, nib slitting continue start, and the action repeats.   (View)

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Photoelectric coupler control thyristor circuit

Published:2011/8/28 21:24:00 Author:Jessie | Keyword: Photoelectric couplers, thyristor

In the circuit, if photoelectric coupler' light emitting diodeflows6 ~ 10mA current, the phototriode is connected, then the thyristor is connected, load RL has current; Conversely, nocurrent flows through load. Diode is used toprovideDC power to light activated triode, resistor RVis connected tocapacitor C inseries in order to storage control energyat power negative half cycle. Regulator tube make light activated triode have stable 15V voltage. This circuit's maximum switch currentis 4A, thyristor phase shift angle range is 0~180°.   (View)

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Low power supply voltage thyristor control circuit

Published:2011/8/28 21:34:00 Author:Jessie | Keyword: Low power supply voltage, thyristor

This circuit's power supply voltage is 12~16V, it can be used in low pressure vessels such as toy train. It makes S566B as trigger circuit to generate control thyristor's connection. DC power is supplied by rectifier voltage circuit, R1 is the step-down resistor. The role of transistor T1 is to reduce control dead zone. Because this circuit's load current is so low, it can be connected a 1~2W bulb to make the Bi-directional thyristor current higher than the maintaining current. Because the transformer power output is small, when the Bi-directional thyristor is connected, transformer's leakage is equal to big series resistor, which can cause short-term voltage stopped, and it should be connected the capacitor C4 in series.   (View)

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Thyristor control flash circuit

Published:2011/8/28 21:37:00 Author:Jessie | Keyword: Thyristor, flash

The figure shows two flash circuits controlled by thyristor. The former uses neon tube FV1 to connect the voltage trigger thyristor, the latter uses UJT1 to connect the trigger thyristor. The formeris AC power supply,the latter isDC power supply. In order to make lamp flash, it is added commutation capacitor to circuit.   (View)

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Thyristor controlling DC motor positive and negative rotating circuit

Published:2011/8/28 21:26:00 Author:Jessie | Keyword: Thyristor, DC motor, positive rotating, negative rotating

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JKH1-791 elevator door driver circuit

Published:2011/8/26 3:46:00 Author:Jessie | Keyword: elevator door driver

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Light contrtol switch circuit using TRIAC

Published:2011/11/10 1:46:00 Author:May | Keyword: Light contrtol switch, TRIAC

Light contrtol switch circuit adopts bidirectional thyristor. This circuit can control make-and-break of 200W power load on 220V AC network . If the power is only 50W, bidirection thyrisotr can not connect radiator. The action point with some hysteresishas about 100lx sun light. When light is weak, thephotoresistor presents high resistance, then the threshold switch TCA345's input voltage ishigher than 0.7 times of pin 2's voltage , and thethreshold switch output end is in high resistance value,then it is breakover bytransistor period triggering bidirectional thyristor. Contrarily, if surrounding light exceeds100lx, threshold switch output end changes to negative, at this time, proclitic transistor and bidirectional thyristor arecut-off, then lamp goes out. Diodes D1 and D2 in the circuit areused for rectification, and it outputs about 15mA controlling current.   (View)

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Light control switch using photoresistor

Published:2011/11/10 1:52:00 Author:May | Keyword: Light control switch, photoresistor

It utilizes power MOS FET as power switch, and the witch sensing element can adopt photoresistor LDR. Whenlight shines on photoresistor, LDR presenst low resistance,andwhen there issignal addingto thegrid of FET, the source-drain is conducted tomake relay coil K change state andgenerate controlling usage or signal. Ifthe photoresistor LDR is connected to low-level position, when it is dark and has no light shining on photoresistor, then the value of photoresistor is high, so VMOS's grid level is high to make lamp L be bright. Reversely, whenthere islight shining on LDR, VMOS grid is inlow level and closed, lamp L isnot bright.   (View)

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Light control switch circuit adopts photoresistance LDR

Published:2011/11/10 1:03:00 Author:May | Keyword: Light control switch

Whenthere isincoming ray, the transistor connected tothe photoresistor LDR in this circuitis inhigh level or zero level. Transistor magnification coefficient β>100 is enough, photoresistance is between 100Ω~100KΩ, which isseparately corresponding to light irradiation and dark situations. If you want to control the load with high power, you should adopt darlington transistors.   (View)

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Blown fuse flash circuit

Published:2011/11/30 21:21:00 Author:May | Keyword: Blown fuse, flash

When fuse is unharmed, neon light NE-2 always shines; when fuse is blown, neon light flashes. Flash speed depends on R1 and C1. This circuit flashes 10 times/s ( it depens on numerical value of components in the diagram) .   (View)

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Semiconductor analog switch circuit

Published:2011/12/1 1:33:00 Author:May | Keyword: Semiconductor, analog switch

High noise immunity operational amplifier analog switch It uses theanalog electronic switching to replace contact switch, and itcan prevent sparkle and radio interference. The diagram is the circuit using junction field effect transistor and operational amplifier and its equivalent machiinery track. When input signal UE ( or UE1, UE2...) has control signal ( high level 10V) , junction field effect transistor is breakover, and it output signal UA ( anti-phase)through operational amplifier. Diagram shows the similar circuit.   (View)

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5G169 open-herding festival lantern with fortune blessing voice automatic control circuit

Published:2011/11/10 2:59:00 Author:May | Keyword: open-herding, festival lantern, fortune blessing, voice automatic control

The circuit is shown in the diagram, its nucleus is festival lantern control application specific integrated circuit 5G169. Loop period interval of larten positive/negative direction lighten is automatic controlled by beat generator circuit, and its sending out voice's power is large. It is used for shopping facade decoration, brand advertising, lanterns and other festive occasions.   (View)

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Muti-function automobile light reminding circuit

Published:2011/11/2 21:05:00 Author:May | Keyword: Muti-function, automobile light , reminding circuit

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Coloured lamp control circuit composed of SH803

Published:2011/11/4 1:00:00 Author:May | Keyword: Coloured lamp, control circuit

Coloured lamp control circuit composed of SH803 is shown in the diagram. It has eight functions, it can be realized by manual or automatic work, and it makeslight emitting diode or various coloured lampsgenerate varied and constantly changing flashing, so it is used for facade lighting decoration shop, holiday decorations and the motorcycle rear lights and brake lights and other decorations.   (View)

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Mood lantern controlling circuit (WT8089)

Published:2011/11/9 20:08:00 Author:May | Keyword: Mood lantern controlling

It can play eight electronic music and sixteent colorful light. Colorful flashing light and fine music can generate good audience effect. The jumping type of colorful light can becontrolled by function controlling buttons' pressing times to display sixteen different flashing kinds. They are turning right for horse racing, turning leftfor horse racing,turning on in the order, turning off in the order, double lights flowing moving, neighboring double light moving rolling, interval double lamps chasing, four lights flashing ar the same time, single lamp ordinal dithering, single lamp reverse dithering, double lights flashing, adjacent double lamps dithering chasing, double lamps reverse jitter flashing, interval double lamps jitter jumping, interval double lamps reverse jitter and four lights flashing and jitte.   (View)

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Six-way loop lantern control circuit composed of HFC3040

Published:2011/11/9 20:38:00 Author:May | Keyword: Six-way loop , lantern control

Six-way loop lantern control circuit composed of HFC3040 module can drive six-way lantern loop to flash, andit hastwo different loop speeds, and it is shown in the diagram. Because the circuit skillfully uses flashing integrated module HFC3040 to make circuit structure simple and cost low. IC1 is theflashing special integrate circuit HFC3040, and its working voltage range is 1.5~5V. So 220V ACvoltage is buck limited by R1, half-wave rectified byV1 to makeLED emit light. At the same time, the two ends ofLED 's about 1.6V steady DC voltageis filtered by C1 toofferpowerfor integrate circuit. Because TR's trigger ends connectto ground,it immediately is triggered to work after getting power. Six output ends L1~L6 is in low level orderly, so six PNP triodes VT1~VT6 are breakover orderly, unidirectional thyristors VS1~VS6and lanterns H1~H6 arelit one by one.   (View)

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Voice controlling lamp (FC52) circuit

Published:2011/11/3 0:55:00 Author:May | Keyword: Voice controlling lamp

The diagram is voice controlling lamp circuit. This circuit consists of operational amplifier FC52, bi-stable flip-flop, relay J, piezoelectric crystal speaker y. The bi-stable flip-flop consists of double NAND gate TMY23A, when speaker y works, it can change voice signal to electric signal. When clapping generates voice, Y will change voice signla to electric signal,then it will be added to opposite phase input end of FC52 to be enlarged. After enlarging, the output pulse isadded to bi-stable flip-flop.   (View)

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The traffic light automatic controller circuit in traffic intersection

Published:2011/11/3 1:55:00 Author:May | Keyword: traffic light , automatic controller , traffic intersection

The input 8V voltage isregulated by78M05 to offer VDD=+5V power supply voltagefor 555. Whenthe circuitgets power, the trigger pulse delaysby passingIC1 (CD4011) gate circuit and R1, C1,then it isadded to IC2's pin 2 after being differential by C2, R22, then the trigger IC2 outputs high level to be in transient state, and its transistion state timing time depends on K1's position, when delay td=1.1RC6, itsets time in 60s, 45s, 30s. When transient state finishes, IC2's pin 2 is inlow level, it isdifferential through C3, R23 to trigger IC3 and form second level signal-shot delay. This circuit is monitor display part of control circuit. If it is really used to traffic command, it should use control signal to driver solid state relay, then the light bulb works.   (View)

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Miner lamp battery alarm circuit diagram

Published:2011/11/9 21:49:00 Author:May | Keyword: Miner lamp battery alarm

This circuit uses the miners lamp battery as its power source, and it isinstalled in ore cap, when gas is over, the head lamp buld will automatically flash, and itis accompanied by alarm sound. This circuit uses less component, and ithas no influenceon miner's normal work,it costs low with adjustable emergency alarm, and it is easy to carry.   (View)

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