New Circuits Page 263
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As shown below, it is a circuit diagram of a portable gas detector. The portable gas detector circuit is used mainly in electrochemical sensors, dual-channel micro-power amplif..
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As shown for the driver circuit high pressure natural gas shut-off valve, the device 01 for the solid state relays. When the engine is in dual-fuel mode of operation, the opera..
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As shown in FIG alarm by a buck rectifier and voltage regulator circuit, gas sensor, comparator circuit and sound the alarm circuit. Buck regulator circuit by a transformer rec..
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As shown in FIG alarm by a gas-sensitive sensor element QM, buck rectifier and regulator circuits, integrated circuits KD28, speaker Y and other components. Gas-sensitive senso..
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Based integrated circuits and relays KA constitute humidity alarm value it uses pA741 circuit. MS01 using a wet-type humidity resistance element as a probe. When the humidity e..
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Boil water or cook with gas stove, it is sometimes due to water spills extinguish the fire mission, if not found to cause a lot of gas bF overflow occurs risk of poisoning. Thi..
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CH217 monolithic gas, gas gas detection alarm integrated circuits, and gas detection alarm circuit diagram R1 is the gas sensing probe, the resistance increases just gas concen..
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CMOS clock circuit can drive a multi-digit gas discharge display, simple circuit does not include an alarm, which can be flashing colon morning and afternoon show. The circuit ..
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Ceramic gas sensors can also be used to analyze the content of alcohol vapor. With the corresponding sensor circuit can be detected with a blood alcohol content. Its working pr..
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Combustible gas alarm circuit is shown. Circuit by the gas sensor, multivibrator and audio output roads. Multivibrator integrated circuit by the NAND gate way inside two NAND g..
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8 ohm output for connecting communication receivers and 8 ohm speaker or low impedance phones, harmful interference suppression continuous random voice transmission. Passband 3..
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After the power is turned on, 220V AC by the step-down transformer T, VDI ~ VD4 bridge rectifier and Cl filtered output of about 10V DC voltage for the Darlington circuit and s..
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As shown for the voice-activated lamp circuit. The circuit consists of an operational amplifier FC52, flip-flop, the relay J, a piezoelectric crystal speaker y and other compon..
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As shown is a practical voice-activated switch, A1 amplifier connected as a conventional microphone B picked up the audio control signal is amplified. After the amplified signa..
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Circuit as shown, with a touch of a finger when the metal sheet S, N neon tube light, since N and photoresistor RG constitute optocouplers make RG resistance becomes smaller, s..
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Circuit principle as shown, neon tubes N1, N2 and photosensitive resistance RG1 constitute an optocoupler. When touching the metal sheet S1 with a finger, N1 light, so RG1 resi..
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Circuit shown in Figure 3-7. Just touch sensor chip (conductive sheet). Eight gear speed can be realized. CC4011 timing pulse oscillator consists of an integrated circuit Ai NA..
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Hens to provide adequate illumination can increase egg production rate, since when asked to shorten the winter sunshine, so chicken specialized households generally use artificial lights way for coop fill light...
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This design is to achieve a long-distance wireless remote control switch lighting control system consists of two parts the transmission system and the reception system...
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It shows a circular lighting control circuit. Circuit, rCl of four two-input NAND gate CD4011, which made of a non- door l, 2 multivibrator composed by the NAND gate 3,4 RS flip-flop circuit consisting of a pulse generated by the multivibrator shaping, ..
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Rw a77s power is the use of integrated circuit fabrication Ji-day double touch light switch, a special circuit point J. Cases the same. Bong electromechanical source transformer T Buck, v]) 1-VD4 rectifier..
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As a result of the relay control (several pairs of contacts, if more capacity is connected in parallel), so the lamp power can be large, the circuit is very simple, just change the capacitor capacitance, you can get a different flash frequency...
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As shown in FIG lighting controller with lights getting brighter gradually eliminate function, which can make the lights do not appear when the lights suddenly brighten the human eye irritation and damage the inrush current can be reduced when the ..
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220V AC after capacitive G buck regulator VS regulator, rectifier diode VD, capacitor filter to G IC (NE555) provides approximately 3.3V DC operating voltage. lC Schmitt trigger connected as light control. Night room inside light, the photosensitive resistor ..
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Shown for the automatic traffic intersection traffic light control circuit. Four monostable delay circuit inclusive The controller consists of four 555 (IC2 ~ IC5) and a number of RC components connected together. 8V input voltage through the 78M05 regulator..
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A circuit configuration is relatively new strong key touch-state switch. Normally, product thyristor VT1, VT2 are in the off-state I-what little light the lamp F. At this point..
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A good performance is a two-wire connection of double touch off indiscriminately even a broken line in the left part of the line for the general lighting, flowers portion of li..
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A simple and easy to do one-way flashing lights string twist troller, it asked the town to make the spider string gap flashes available to the small shop or home decoration, re..
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A use NF, double touch lamp ~ 55 base circuit made of switches. 2ZOV AC by [1-, c:, VDI, vs simple composition of a single power save buck and a half crossing fetters flow regu..
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A water Happy Valley -type four flashing lights string controller, electric bollard fp is a star for the use of a type j Ding Japanese lantern s 123 control specific integrated..
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AB generated at both ends of the voltage is adjusted to take after being rectified by supplying the motor armature windings, thereby adjusting 15W Lan achieve speed purposes. I..
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Application ikW high pressure mercury lamp ballast system; Figure 12.44 shows IR213D ikW for a high pressure mercury lamp ballast system schematic. Figure, not only IR2130 is u..
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As a result of the circuit shown in Darlington type phototransistor as the sensing element, the more sensitive to low light, suitable for the reflected light detection signal. ..
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As a result of the relay control (several pairs of contacts, if more capacity is connected in parallel), so the lamp power can be large, the circuit is very simple, just change..
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As is the use of thyristor controlled unidirectional flashing lights string controller, diodes VTI, VT2 connected to a multi-I are from Che oscillator, after power, VT1, VI12 t..
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As shown for the intensity of reflected light detection circuit. The circuit consists of an infrared light-emitting diodes, photodiodes, CMOS analog switches, operational ampli..
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As shown in FIG bathroom light switch gated automatic way, when someone enters, once the door is opened, the light switch is turned on bright lights. When the out door is opene..
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As shown in the circuit as a precision bright light control circuit, its work is not affected by the power supply voltage and ambient temperature. Resistors R1, R2, R6 and phot..
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As shown in the circuit as a precision bright light control circuit, its work is not affected by the power supply voltage and ambient temperature. Resistors R1, R2, R6 and phot..
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As shown in the circuit is a state of the flash output can change the speed of lighting control circuit according to the strength of eight timing of the audio signal. Circuit p..
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As shown with a bridge input circuit phototransistor BPY62 power operational amplifier and can control up to 8.5kW of power load off. Two 10k ohm resistor divider midpoint comp..
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As shown, the circuit 555 as the core, and the composition of the photosensitive resistor RG and RP1 like. RG strength with light exhibit different resistance, reset and set th..
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As shown, this circuit can automatically adjust the brightness according to ambient light intensity of light. If outside, high brightness, light on dark, whereas low ambient br..
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Automatic electronic circuit shown in Figure signs, it is mainly by voice circuit, an oscillation circuit and a driving part of the display circuit. ..
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Automatic lights using a light twist, it TWH87sl power switch integrated circuit composed of a first input terminal TWH8751 O feet to the positive terminal of the power supply,..
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BH-SK-I with the voice of a single bond integrated circuit fabrication touch light switch circuit shown in Figure, the dashed line in Figure 3-40 left section for the general l..
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By ASIC it is a flashing light string web dig troller, which has four outputs; single key cycle Control 1 6 kinds of tricks, and can choose 16 or section 8 before paragraph aft..
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By the transistor VTi, VT3 and VTs and RC components constitute three separate multi-resonator oscillator. Oscillation frequency levels dependent on the value Ri, R3, Rs and Cl..
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Circuit as shown, it is by the sound transducer sensing switch/electrical, light control switch, SCR control circuit, vocal music circuit and the AC step-down rectifier circuit..
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Circuit consists of three parts is light-control section 5: Two foot f light time control section; the third is the implementation part of dry i power supply section. JCz (NE55..
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Circuit shown in Figure 2-50. This circuit uses field effect tube should, through the ingenious electronic components constitute a unique self-lighting controller. The informal..
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Circuit shown in Figure 3-5. It can be manual (button SB) and light control (phototransistor VTj). When the light of a flashlight quasi VTi, fans will turn on the operation, an..
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Circuit shown in Figure, the dashed line in FIG left portion as an ordinary lighting circuit, the right part of the production of the double bonds of touch with NE555 3-3 Switc..
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Circuit works The fluorescent lamp electronic ballast circuit by the rectifier filter circuit, high-frequency oscillation circuit and output circuit. Circuit, the rectifier fil..
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Cl, VDI, VD2, C2 composed of simple capacitive step-down voltage regulator circuit + rectifier output of about 8v DC voltage for LM567 electricity. 5,6 feet manifold connected ..
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Clever use of a four-way slowly dimming LED driver integrated iU shoe production and Qis four flashing lights string controller. Ten Electronics Co., Ltd. Wenzhou production HF..
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This circuit uses "and other potential triggers" Circuit. The so-called equipotential trigger means crystal bidirectional thyristor trigger, whether positive or negative trigger,..
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After each zero electromagnetic pickup has a sine wave input, as shown in the National Semiconductor LM2907 circuit will produce an output pulse, the circuit can be used for di..
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Also known as megger insulation resistance meter, the resistance in megohm level. Mainly used to measure the motor, the insulation resistance of electrical circuits, equipment,..
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Ammeter measuring current in the circuit, the need to break the circuit in series in the circuit to be measured. The clamp meter without the need for the case to break the circ..
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Application circuit of the device as shown in principle. In the meter, the voltage and current coil and the coil is connected to the power line, whether or not connected to a l..
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As shown in FIG INA337 constituted by the end of the load current measuring shunt circuit. Will produce a voltage drop when the circuit sampling resistor Rs in series between t..
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As shown in FIG constituted by ISO102 OPA27 500VDV DC current measurement circuit. Circuit between + 500V DC voltage source and the sampling resistor in series with a DC motor,..
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Capacitance/C tuck bit IJ volume level change is directly converted into electrical parameters, electrical parameters and then be converted to a unified signal transmission, pr..
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Capacitive measuring instrument, b is the direct reading instrument measuring the capacitance of the circuit. The measuring instrument is capable of measuring a few picofarads ..
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Circuit in the frequency range, an accuracy greater than 2%, for the production of bode curve. Two sine wave into a square wave, while the amount of overlap compared with the t..
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Commonly used high sensitivity header is actually using microampere meter, use it to produce resistance meter using voltage can be very low, but producers still with the law an..
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A wireless hands-free telephone device circuit diagram as follows: ..
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Automatic light is introduced by the telephone block system, the phone rang that night and asked the owner to pick up the handset or pull L, the lamp will light up; the phone s..
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Automatic recording telephone interface circuit as shown, the circuit has an automatic answering and recording function (need to reprovision or small solid state recorder recor..
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Automatic telephone responder circuit is shown in Fig. FIG IC2 10 seconds voice recording circuit SR9G10A, press the power switch S2, can be built by IC2 electret microphone in..
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This device allows you to control remotely any (with suitable add-on expansion boards, up to eight) device, such as lights, water heaters (boiler), air-condition, plant watering, alarms, etc via a relay. By using it you can for example water the garden at....
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By phone automatically when the lamp base circuit NE555 and optocouplers constituted a call at night, light will automatically light up, hang up delay imi. About, self-extingui..
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CX9800 models of mobile phones and desktop PC have chosen excellent performance voice processing circuit, the amplitude and bandwidth of the microphone signal is compressed to ..
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Circuit principle outside into the phone when ringing pulses through C1, R1, D2 to C2 charging voltage in 6V, this voltage causes N1, N2 reverse, V1 analog hook, and start V4, ..
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Circuit principle: computers AC power load is large, the use of the current transformer current sensing. It can be used to detect whether a current power line, determine its st..
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Automotive electronic locks circuit principle is shown in Fig. ICl dedicated lock IC 5G058, it O ~ feet respectively external key switch to the positive power supply, which is ..
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Circuit car wipers speed controller is shown in Fig. It can easily shake wiper speed between every second to ten times per second for any change, flexible and energy saving...
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Although the respective inputs are differential inputs, but the right amplifier is greater than the general OP bias current (800nA), so as the input coupling capacitor, confide..
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As shown by IF processing circuit (MC1350) and video detector MC1330AP combined video circuits. Is modulated depending on the image signal IF carrier frequency (45 MHz) is supp..
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As shown by a reed switch off the TV highlights cancellation circuit. Brightness potentiometer W ground a series reed, normally watch TV, the reed contact is closed, the capaci..
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As shown in FIG amplification is used to convert a variety of devices and TV video output signal, such as some VCRs, DVD players need weak output signal amplification occasions..
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As shown in FIG grounds MAX4104/4105/4304/4305 video cable driver amplifier circuit configured. MAX4104/4105/4304/4305 as a coaxial transmission line suitable for amplifying vi..
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BTS412B as two high-side power MOSFET switch and two BU271L (50v, Zhang 1n) for the low-side switch, can be composed of bi-directional H-bridge DC motor drive circuit shown in ..
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Circuit Overview Now many families have a TV, VCD, video recorders, game consoles, cameras and even DVD and other household appliances. If the above-mentioned appliances out of..
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Circuit shown in Figure, IC1, C1 composition 400HZ about low frequency oscillator; IC2, C3 composed around 37MHZ frequency oscillator; low-frequency signal from the output C2 o..
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Circuit uses two features: one is the integrated electronic tuner with AV output (commonly known as the tuner) which can be received CATV full channel TV signal into a final vi..
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Circuit operation principle of the device shown in Figure. When the barbed wire Fe intact, LSE's O, feet collusion between its pin output high,..
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High pressure alarm High sensitivity, high-voltage electric energy in the body from lOkV 2m at or away from the low-voltage mains (AC 220v) 0.3m at the alarm device yuan less device, the circuit is simple, easy to manufacture, small in size, easy to use...
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This is a two-way can set the alarm circuit which uses a Schmitt IC, with responsive and sound and light show, small size, low power consumption, all of the elements is only 13, a very low cost. This circuit is divided into two parts by the A, B and R4,..
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Phone alarm device can monitor and prevent unlawful misappropriation of your telephone line. When someone in your telephone line and the machine thefts from outside the alarm on the issue of interference signals, so thieves can not dial, and the light was....
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It uses a negative temperature coefficient thermistor for temperature sensing element Rt. By the resistor Ri, Rs, , potentiometer RP and thermistor R. Composition temperature bridge; by the transistor VTi, VT2 constituting the differential amplifier; by the....
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As shown in manpower inductive alarm circuit, simple and practical, when a person's hand near the sensing line, the alarm will send out alarm sound, which is very suitable for the male electrical burglar alarm. Induction line L is a long lo ~ 50cm of wire,..
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It shows an automatic unattended burglar alarm circuit, mainly for family night, warehouses and other occasions automatic unattended. The circuit consists of pyroelectric infrared sensor light control circuit..
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When the water boils, it is not only the police, but also cut off the heater power. Temperature sensing element with a fluorescent neon light bulb restructuring within the starter...
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It uses KD153 type "ding-dong" music IC, issued a "ding-dong" sound alarm. d = 221611 " There /dianlu/safe/201303/160666.htm" refrigerator door alarm circuit...
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By the 555 IC A composed of a non-steady-state self-excited multivibrator. When the sensor very close to the high-voltage electrified body, the piezoelectric ceramic sheet B out alarm. When it is close to the frequency electric field, cricket issue vibrato;....
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Circuit works: When the gas sensor MQK-2 surface adsorption or smoke when combustible gas, which inter-electrode resistance BL plummeted, this time by the Rp2, R1 and BL electric poles between resistance partial pressure node C potential drop, when it fell....
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After the gas stove ignition, closing switch S, the circuit is in working condition. Phototransistor VT1 by flame before irradiation, low resistance state, the transistor VT2: saturated conduction, VT3 and integrated sheet music collector connected to..
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This is the over-temperature alarm and a cooling by the CD4011 four NAND gate integrated circuits, and for monitoring the temperature of the oven used. When the thermostat circuit failure or power outage, the inside temperature is above or below the allowed..