Top Circuits Page 75
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Is shown in the output is 5V / 0.4A low-power switching power supply circuit, the circuit can be used to make transformer saturation soft-switching circuit...
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Is a relay controlled by a closed turn the digital logic circuit Rd touch input switching circuit...
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Oscillation: C310 positive terminal voltage of about 300V, the R311, R312 is applied to the switch BG311 B pole, while the B301 via the switching transformer (4), (6) was added BG311 of C pole winding, the switch begins to conduct,..
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Switching power supply drive medium power applications in PM4040F bridge circuit as shown below: The PM4040F to drive a 200W to 800W switching power supply can refer to the following circuit, the other circuit section please PM4040F practical circuit...
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T amplifier circuit schematic section shown in Figure 3-51 Japan Sanyo STK6303 Pina made high-power thick film integrated circuit, the power supply voltage maximum Dashi sov, output current up to about loA Division monolithic circuit powering Guests 36V,..
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AC-DC power supply without power switching circuit normally used for lighting load circuit, once the power grid or power is restored, the standby power supply automatic switching immediately. Automatic switching circuit using a transistor as shown, the..
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A typical DVD switching power supply circuit Is shown in digital products standby power supply circuit, which uses switching power supply structure, the oscillation switch IC T..
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Adaptive zero voltage switching electronic ballast schematic diagram: IR2520 is mainly used for driving the fluorescent 40W or less. Rated lamp power different, Q1, Q2, L2 and ..
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Applications are given to complete the four-piece HL402 switching power supply system diagram system drive four power IGBT switching power supply system. FIG IGBT drive pulse i..
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As illustrated, 555 and R1, R2, C1 composition astable multivibrator, the oscillation frequency is about 10kHz, duty cycle close to 50%. VT2, VT3 switch as expanding the use of..
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As shown Panasonic M12H switching power supply circuit, the use of Panasonic movement M12H TV: Panasonic TC-230H, TC-2030DHN, TC-830D, TC-840D and the like. Oscillation Approxi..
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As shown by L296 chip high current switching power supply chip composed of 5 ~ 15V, 4A power supply in FIG. L296 monolithic high-current switching power supply chip features ar..
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As shown in FIG Hitachi np8c switching power supply circuit, Hitachi NP8C power models are: Hitachi CTP236, CEP320D, CRP350D, 450D, Furi HFC-236,450, Venus C37-401, C46-1, C563..
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As shown in FIG by DN-25 IC switching power supply. DN-25 is a monolithic switching power supply device, suitable for the production of medium output current, wide voltage rang..
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As shown in FIG constitute grounds L4970A power switching power supply. L4970A is a high-power monolithic integrated switching regulator, the chip uses SIP-15 package, which is..
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As shown in FIG constituted by L4960 + 5 ~ + 40V switching power supply circuit. AC 220V voltage through the step-down transformer, bridge rectifier and filter DC voltage Vi, i..
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As shown in the design of the power supply circuit diagram. Using the oscillator circuit 74HC series CMOS logic circuit, the switching device is MOSFET. This means the number o..
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As shown, the circuit adds an optical coupler (CNY75A) and adjustable precision shunt regulator (TL431). Current limiting resistor R3, R4 and R5 for the sampling resistor. When..
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As shown, the zero volt switching circuit in the zero crossing of the AC voltage generated trigger pulse. In order to trigger the zero crossing of the 555 limit comparator conn..
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BE-150 mainframe computer switching power supply circuit The host computer is shown in BE-150-type switching power supply circuit, the oscillation control IC to switch TIA94. A..
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Changhong DVB-2000 digital satellite receiver switching power supply circuit Rainbow DVB -2000 top box digital satellite receiver switching power supply circuit mainly by the p..
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Charging circuit from the DC power supply switching power supply control ..
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Circuit shown in Figure, the circuit can achieve greater power output, just change the part of the device. FIG circuit R1 to the left, L1, D1, C1 to C7 are conventional common ..
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Complementary voltage switching Class D amplifier circuit shown in Fig. Transistor VT1, VT2 are 3DA12. Among them, two of the same type (NPN) tube series product transistor VT ..
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The supply of circuit becomes from a AC line in the J1. This voltage can be from a separate transformer 2X12V (the prices of materials that I give it is for 2X12V AC), from existing coil 12V in their M/T of power amplifier or if it cannot become somebody....
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The Sallen-Key realization of a 5.25-MHz, three-pole Butterworth filter has a gain of 2V/V and can drive 75 back-terminated coax with an overall gain of 1 (Figure 1). Used to reconstruct component-video (Y, Pb, Pr) and RGB signals, this filter has an....
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Many designers use small pulse generators to delay signals, open timing windows, drive sample/hold circuits, and other functions. Though the hardware implementation of these generators does not pose any problems, the lack of dedicated circuitry sometimes....
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Generating complementary clock signals in a Spice simulation is an easy task. However, this task gets much harder if you need to introduce some dead time into the signals. This difficulty is especially true when you`re dealing with a....
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In a CCD (charge-coupled device), packets of charges shift across the array. The transistor array, also called a bucket-brigade shift register, receives drive from a dual-phase clock signal. Dual-phase clock signals comprise two synchronized clock signals....
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The main circuit uses a two-input NAND gate four digital integrated circuits, wherein the composition..
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With NE555 making push-button delay section lamp circuit shown in Figure 3-5, the circuit from when base integrated circuits, ..
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DK-5A, 5D, SDb control box, all with a thermal electromagnetic overcurrent release, the circuit shown in Figure 6-80. Trip has overload and short circuit instantaneous action l..
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Is a good touch-down can delay the lamp, the circuit is characterized by: the static power consumption minimal; External switch terminal ..
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Delay action, the instantaneous reset control circuit is divided into conducting pipe rechargeable delay circuit, tube cut-off control rechargeable delay circuit and a delay ci..
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The AD8055-based amplifier has greater-than-100-MHz bandwidth, fully adequate for the 10-MHz oscilloscope. Its input impedance is 1 M in parallel with 30 pF to match the oscilloscope`s input and its low-capacitance probes. Figure 2b shows the final eye....
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When activated by pressing a button, this time delay relay will activate a load after a specified amount of time. This time is adjustable to whatever you want simply by changing the value of a resistor and/or capacitor. The current capacity of the circuit is....
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Transient overloads are not short circuits but can push the power supply above its nominal load value. This scenario occurs with typical loads such as printer heads and small motors. When facing such a load profile, the power supply can easily trigger its....
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1C is a CD4 cries O. A (16) feet for the Vcc terminal. (8) feet for the ground. (12) feet for the reset terminal. (7) feet for Qt end, (3) feet to q. End (Sh, U). (Il) FW exter..
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1C is SK - 2 integrated voice, when the object hit the sound is received in the body Xi ester cylinder MIC, the audio signal goes through a coupling obstacle to 1C. After ampli..
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The Saver V5.0 runs simple clock emulation program, turns a night light on and off with preset time, say 19:00 to 22:00 everyday. The design features low cost, easy installation, no battery backup and no EMI. The AT89C2051 uses external oscillator generated....
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No description available...
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This page shows three circuits for using the 555 timer IC as a photocell controlled train detector.
The circuit is shown driving light emitting diodes but any load of less than 200 milliamps could be used.
Shown on the schematic is a secondary....
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The following are LM555 timer circuits that have unusual functions. Designed to time a sports event; In this circuit the GREEN output is adjusted to be on for 3 minutes and then the RED output is set for 1 minute in a repeating cycle. Each time the light....
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A switched timer for intervals of 5 to 30 minutes incremented in 5 minute steps. Simple to build, simple to make, nothing too complicated here. However you must use the CMOS type 555 timer designated the 7555, a normal 555 timer will not work here due to the....
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A switched timer with equal make and equal space periods timing adjustable from over 6 minutes to 38 minutes. This timer circuit is similar to the 5 to 30 minute timer except that when switch S1 is closed, the on/off action of the circuit will continue....
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This circuit is intended to let the user turn off a lamp by means of a switch placed far from bed, allowing him enough time to lie down before the lamp really switches off. 15 seconds delayed switch-off
A good idea for bedroom lamps.
Obviously, users will....
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Turns-off your amplifier when idle for 15 minutes
Fed by amplifier tape-output. This circuit turns-off an amplifier or any other device when a low level audio signal fed to its input is absent for 15 minutes at least.
Pushing P1 the device is switched-on....
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This timer was designed for people wanting to get tanned but at the same time wishing to avoid an excessive exposure to sunlight.
A Rotary Switch sets the timer according to six classified Photo-types ...
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The purpose of this circuit is to power a lamp or other appliance for a given time (30 minutes in this case), and then to turn it off. It is useful when reading at bed by night, turning off the bedside lamp automatically in case the reader falls asleep... 30....
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Delay saving lamps as shown is a sound and light control delay energy-saving lighting double. It can directly replace ordinary light switch without changing the original lighti..
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Delay starting a motor control circuit ..
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Delay time is 0.5 ~ 3. 5s, adjustment potentiometer RP, can change the delay time. ..
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This circuit design was used to switch on device via a LED photocell arrangement (optocoupler) using components R1, C1, D1 and Q1. It produces a delay on powering up to ensure correct sequencing of certain equipment. A very simple delay timer using a....
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The two circuits di atas illustrate opening a relay contact a short time after the ignition or ligh switch is turned off. The capacitor is charged and the relay is closed when the voltage at the diode anode rises to 12 volts. The circuit on the left is a....
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This is a circuit monitoring device. It runs for over 10 days and can log up to 32k events both digital and analog. Samples are logged either on a timing basis (.01 to 2.5 seconds), or on a triggered basis. Four inputs are provided, up to three of which can....
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Intermittent failures in electronic systems are some of most difficult to diagnose. This device is designed to run for days at a time looking for a failure and logging the event. The unit is based on a PIC16F84. Six digital data lines are brought in via a....
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A circuit that will find enough applications. Basically the designing became in order to exist delay in quench one or more lamps in a stairwell or in any other space exists this need. It can become use, for the control various motor or other appliances, what....
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I had designed up an oscillator with a Power Output circuit. Problem was when power was applied to the entire circuit, the output of the Oscillator gave a Momentary Spike into the output circuit. Thus Driving it full on for a split second. This Circuit....
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The schematic requires few components, because the timer function has been incorporated by Nutchip. For once, from the start, made up of contacts of the relay RE1 connected to terminal M2. If we turn on an appliance at the end of time, we will use the relay....
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The circuit shown will switch on and off a resistive or inductive load up to 800VA with the possibility to adjust both the on and off period. Switching takes place during the zero crossing of the sine wave. The switch on point is around the zero crossing but....
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This is a simple circuit which I built to one of my audio amplifier projects to control the speaker output relay. The purpose of this circuit is to control the relay which turns on the speaker output relay in the audio amplifier. The idea of the circuit is....
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If you need a timer circuit, we go after the most proven 555th However, if the delays are longer, based on timing capacitor capacity is too large. In this case, a circuit of Figure 1 After pressing the button - reset circuit - starts multivibrator. ..
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Described timer to participate in the current circuit switch - bulb without any modification of existing pipelines.
Connect the timer is in Figure 1 The time switch has only two outlets, which is connected in parallel to the button (Fig. 1a) or switch (Fig.....
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FIG. 57 is a simple delay lamp circuit, which is connected with the lamp E uses two-wire connection, so security bars when installed, can be directly replaced by an ordinary wa..
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FIG inverter I, II and R1, R2, CI and SB constitute bistable trigger switch, each time the switch SB, the anti- phase II level to the output of a change. Composition R3, C2, VD..
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FIG IC, ICR, Ri, R ,. AN composition and bistable contact cast Ge circuit. ICc. lc world where;, c2, Dj New Zealand into one-shot delay circuit meaning: [CL. ICrr W well-linkin..
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555 IC using a delay circuit 2 It is actually a one-shot circuit. A delay time of 1. 1R3 C3. Typically R3 taken lkfl ~ lOMfl, C3-5000pF ~ lOOOpF, gave a delay of 5y s-15min...
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555 IC using a delay circuit of the four b They are a jump from high to low transition of the delay circuit. That button is pressed SB snow, the output is high, after some dela..
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555 IC using a delay circuit ter It is the transition from low to high delay circuit. Ie after pressing the button SB, after a delay after birth, the output terminal goes high ..
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Delay application circuit is shown in Figure purposes JEC-2 consisting of two. When the input end is logic 0 to 1, the output also immediately end 1 ; but when the input end is..
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Diode VD2 ~ VD5, SCR vs consisting touch switch main circuit, R5 and VDI constitute a power supply circuit, the output of about 12V DC voltage of about, for manifold A electric..
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Circuit shown in Figure 6-24. Both ends of the relay coil ' in parallel with a resistor Rf or auxiliary diode VD, is equivalent to power after a short circuit coil core increase, thus making prolonged release. Figure 6-24 (b) of Rf can not...
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In order to meet the needs of the control loop, often require electromagnetic relay or transistor relay to accelerate or delay action, from action to constitute accelerate or delay circuit...
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Using 555 lights lighting group delay IC circuit of the circuit shown in Figure 2-46. By the 555 IC and resistor-capacitor circuit composed of the delay. The circuit without light transformer T is still energized, energy. Delay time is determined by Ri, C2...
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Conducting pipe rechargeable long delay control circuit Adjustment potentiometer RP, can delay up to several tens of seconds. ..
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Conducting pipe control rechargeable short delay circuit 2 Adjustment potentiometer RP, allows the delay time of several hundred milliseconds to several seconds. ..
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vl.U no mantle base current. Open cut II:, n is also turned off when the touch when the metal sheet. CI JF start charging. Lu Ci Bu l: charge to 2V Tsui l: time. V, Chong: im, generating ..
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Sound with CD4011 digital circuits made light lamp dual-control delay section circuit shown in Figure 3-17, the left portion of the dashed line in Fig general..
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In order to meet the needs of the control loop, often require electromagnetic relay or transistor relay to accelerate or delay action, from action to constitute accelerate or delay circuit...
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Undervoltage release is long-term work, when the power supply voltage drop in the operating voltage range when the release is released, and directly led to the tripping axle rotation, cut off the breaker. ..
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Constant current charging circuit long delay Shown as a long delay using CD4541 constitute constant current charging circuit, suitable for Ni-Cd batteries. When the power is turned on after, CD4541 @ pin output high TWH8778 electronic switch is turned on, the..
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Using a wire connection, use NFA.55 timebase circuit delay type light touch switch, it can directly replace ordinary mechanical switch, without having to change the original interior wiring...
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Lamp relay delay circuit shown in Figure 7], S131, SB2 are lights button mounted anti-machi not a different place, the lamp can operate F. LEDs LEDl, LFr) 2 should be installed in SB1 and SB2 at the "Peter asked in switch position indication easy to use...
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Just use the call sheet to touch the electrical threshold M, namely E lamp lights when asked the same interval subparagraph, lights automatically turn off. VD], vs, (., C, to form a lH capacity drop voltage regulator rectifier circuit, (1 at both ends to ..
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CDI011 integrated circuits using sound, light control stairs delay switch circuit is relatively simple, Pi can be good. Scarf, and non-f JI and NAND f JlI constitution "and" r J circuit, differential input dynamic. Only two input terminals that is....
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Closing the switch S, AC positive half cycle through VDI, R vs SCR opened simultaneously at both ends of the capacitor C is full charge. In this case the positive half cycle alternating current through the lamp H vs power, negative half-cycle through the..
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A 2-input NAND gate integrated circuit fabrication of digital delay lamp circuit, VD3, vs, after Composed of simple capacitive voltage rectifier buck crossing the half line, th..
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A 555 four-base integrated circuit delay circuits They are a jump from high to low transition of the delay circuit. That button is pressed SB snow, the output is high, after so..
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A delay by the improved quenching lamp pull switch, its performance and the example described delay lights care line switches, but the work of a high degree of stability and go..
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A delay circuit using an operational amplifier It uses an operational amplifier A as a comparator, high timing accuracy. The timing of the timer is in the range of 1 ~ 30s. Del..
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A delay using his electric lamp circuit. Normally, product thyristor VTH off iLi light E does not light, turn on the lights when needed, according to FSH, VT1, VTZ group into c..
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A feast with enough delay lamp circuit is very suitable for use on the bedside table, which is characterized by a button SB, lights; then click the lights off; If the lights do..
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A photosensitive daytime electricity 1B very small positive value. 555 (4) feet (j reset pin voltage small f IV group manifold ICz. Electrical output pin generous IC, a reset (..
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A relatively simple circuit Lu Qing, stair walkway light control delay light switch, the disadvantage voice a little less sensitive, and sometimes difficult general conversatio..
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A spider is a delay KD-9300 music IC, when you press the button switch SB, electric lamp E lights up, the delay about 20s, lamp E automatically turn off. VD, vs, C., (, And oth..
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A strong anti-interference ability Lu light control delay switch circuit, it needs within a specific time in a row clapping I. lamp lit square Xi, after a delay, lights automat..
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A thirty mining lamp control ASIC production delay lamp circuit is very simple. Pour in. H L2102 IC Wuxi love core Microelectronics Co., Ltd. (lmp, WV.7W. Wx.sjc.t n) Productio..
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A two battery-powered light touch delay circuit, it can be placed on the bed pillow, nighttime convenience, to touch metal M under the capsule on a small lamp will automaticall..
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A unique circuit design sound and light control delay stairs walkway lighting switch, it has a higher voice sensitivity. In the evening, when someone walking on the stairs r, f..
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After the line on the power switch, the motor does not start immediately, but to delay a specified period of time, the machine can be used for automatic intermittent lubricatio..