Top Circuits Page 66
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Circuit shown in FIG. 3 + 20. Figure, SBi as the start button, SB2 is the stop button, Hi to run lights, Hz as down lights. In the circuit described later, in order to avoid te..
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Circuit shown in Figure 13-3. Figure 13-3 (a) DC power supply, Figure 13-3 (b) with AC power. They are used to control the relay. Flash frequency is determined by the resistanc..
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Circuit shown in Figure 13-4. It uses triode control. Two transistors VTi, VTz by capacitive coupling C, so that they alternately turn on and off, so that H produce flash light..
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Circuit shown in Figure 3 a child opening the main amplifier balanced by the electromagnetic pickup, line amplifiers and high tone control circuit consisting of roads and other..
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Circuit shown in Figure 3-121. The key component of electromagnetic holding brake is an electromagnetic brake brakes, brake solenoid which is mainly composed of two parts iron ..
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Circuit shown in Figure 3-123. When you press the stop button SBz, contact KMi release, cut off the power to the motor, at the same time, KMz pull, turn the electromagnetic bra..
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Circuit shown in Figure 3-124. The line does not use an intermediate relay. Figure, Kv is the speed relay, when the electric engine speed is greater than 120r/min when the cont..
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Circuit shown in Figure 3-127. It uses the time relay KT instead of the speed relay. Plugging time determined by the KT set. Generally 1-2s (adjustable). The circuit is suitabl..
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Circuit shown in Figure 3-129. The circuit is C650-2 lathe brake control circuit. Kv using speed control relay. ..
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Circuit shown in Figure 3-130. The line differs from FIG 3-129 line that press the stop button SB3, the electric motor begins braking. In addition, start-up and braking, the mo..
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Circuit shown in Figure 3-131. It uses a relay in place of the speed control relay. The circuit is suitable for dusty rings and other poor environmental situation. ..
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Circuit shown in Figure 3-132. The line is automatically round-trip, plug braking circuit. In order to prevent or limit switch SQl offside SQz malfunction caused the accident, ..
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Circuit shown in Figure 3-134. This circuit uses automatic control braking means, it is given in Figure 3-133 (a) a base improvements made on the basis of using the time relay ..
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Circuit shown in Figure 3-135. Braking time is determined by the time relay KT. ..
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Circuit shown in Figure 3-136. The line adds a limit switch SQ, when the motor is running with a mechanical device to a predetermined position, turn off the power and dynamic b..
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Circuit shown in Figure 3-137. This eliminates the need for a step-down transformer line, using the principle of energy storage capacitor discharge realization brake, it can be..
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Circuit shown in Figure 3-138. The line is also using the principle of energy storage capacitors discharge achieve braking. Capacitance C and resistance R parameters from the m..
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Circuit shown in Figure 3-139. This circuit uses a rectifier diode rectifier brake for neutral grounding of the three-phase four-wire power supply system. ..
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Circuit shown in Figure 3-141. The line autotransformer voltage starting, dynamic braking. Figure, SBi buck start button, SBz the stop button. Buck start-up time by the time re..
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Circuit shown in Figure 3-143. The line not only make the braking effect of the motor is in the normal shutdown, and jog through the process and has a good braking effect. Figu..
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Circuit shown in Figure 3-144. The circuit for the automatic control of dynamic braking circuit using the time relay KT control system up time, dynamic braking power using the ..
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Circuit shown in Figure 3-146. This eliminates the need for a step-down transformer line, using the principle of energy storage capacitor discharge realization brake, it can be..
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Circuit shown in Figure 3-147. To allow sufficient braking time, using the time relay KT (1 ~ 2s, adjustable), the real on the occasion of a brake stop time may be short. Figur..
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Circuit shown in Figure 3-154. Figure, KM3 braking contactors. Shutdown, you can disconnect the os. At this time, KM3 was electric pull its normally open contact closure shorti..
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Circuit shown in Figure 3-2. That is in the original loop reactor governor again a series reactor. Reactor available TV choke on, can also be made: with such. About 3mm high st..
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Circuit shown in Figure 3-21. It issued motor startup sound, light signal to start the process is completed, the signal stops. This circuit is adapted to drive the motor by mea..
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Circuit shown in Figure 3-35. The advantage of this approach is to start the motor running from start to full voltage step-down switching over process uninterruptible power sup..
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Circuit shown in Figure 3-8. It allows the fan when the turn stop, stop for a gradually increasing air volume decreases by a stop, so the cycle repeated. It uses 555 IC A compo..
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Circuit shown in Figure 3-9. It is similar to Figure 3-8, except that zero off MOC3061 type photoelectric coupling B directly connected to control fan operation. ..
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Circuit shown in Figure 5-60 in Figure 6 by the operational amplifier IC op amp set up a channel pre-amplifier to compensate for the loss of tone control circuit caused by inse..
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Circuit shown in Figure is the use of low-drift current source circuit MIC2951 constituted its current source output current values are: ..
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Circuit shown in Figure, when the phototransistor VT1 receives infrared light-emitting diode to the infrared light emitted, VT1 conduction, the inverting input of the comparato..
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Circuit using the form shown in Figure 1-36, the feedback circuit and the bias circuit separately, Rfl take about 30fl. To ensure put magnification, R queue take lkflo between ..
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Circuit works The danger zone warning circuit from the regulator circuit, the pyroelectric infrared detection trigger circuit, electronic switching circuit, voice circuits, aud..
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Circuit works The harvester warehouse full of reminders by the photodetector amplifier circuit and sound and light alarm circuit, as shown in Figure 1. Circuit, the photodetect..
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Circuit works as follows: the high frequency part of the antenna to receive AM radio to a radio-frequency signal amplification crossing, elected by this vibration level 465kHz ..
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Circuit, the comparator Al, A2 is a single trigger timing device. When the light is interrupted, photodiode VD of current changes. Al output trigger A2, A2 output goes low and ..
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Circuit, the diode VDi, f Pooh is used to stabilize VTi, VT2 base bias, so that when the supply voltage in a certain range, VTi, VT2 a more stable quiescent point. If there is ..
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Cl capacitor feedback amplifier output signal diversion effect. In the bass, ct t is not similar to the open diversion effect. As the frequency increases, the streaming effect ..
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Class A power amplifier distortion, although low, but its low efficiency and output power is small, so people designed B power amplifier circuit. B amplifier circuit is to work..
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Class AB output stage circuit coupled diode shown in Figure 10-8. Static, adjust VT1 bias circuit (not shown), so that the output at point E on the ground DC voltage UE o. The ..
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Clip-on current probe, such as the Tektronix P6021 current waveform for oscilloscope display is very useful. Unfortunately, for the low-frequency response is always some limita..
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Closed loop portion is composed of longitudinal and transverse two systems, circuit works briefly as follows: issued by the control circuit of the stepping motor CNC system pav..
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Comb electric circuit shown in Figure 1-3. It has two temperature options, switch S into L or H profile file, you can get different temperatures. Then later on switch S, the ci..
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Combination of common-source grounded emitter amplifier A combination of common-source grounded pole radio amplifier. Common emitter amplifier input impedance in the range of l..
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Combination of source is grounded and the emitter follower The source is grounded and the emitter with Chong device (common-collector transistor amplifier) combination. As show..
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Common base transistor amplifier circuit of a unit Common base amplifier basic structure of the circuit as shown, one of the key components primarily biasing resistor, capacito..
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Common collector amplifier circuit DC and AC path b (3) common-collector amplifier circuit DC and AC path when common collector amplifier circuit for analysis, can be divided i..
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Common collector amplifier via a DC and AC (3) common-collector amplifier circuit DC and AC path when common collector amplifier circuit for analysis, can be divided into DC an..
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Common emitter amplifier circuit resistance and capacitance coupled basic ..
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Common emitter amplifier input and output signals of the phase relationship Common emitter amplifier circuit phase relationship of the input and output signals, as shown in FIG..
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Common emitter amplifier works a Signal by the common emitter inverting amplifier output signal amplification unit posterior pole circuit, it works as shown. When analyzed, we ..
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Common intermediate frequency amplifier circuit having a circuit and on the radio as shown in FIG. Component Parameters Reference values are as follows: 1) transistors: VT1 to ..
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Common mode input voltage up to difference l00V enlarged circuit diagram: ..
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Common mode signal of emitter-coupled differential amplifier circuit a At the input of the circuit is assumed that two equal small increase, of the same polarity signal (referr..
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Common phase frequency detector can be divided into mutual coupling and capacitive coupling frequency discriminator frequency discriminator according to their coupling. Its imp..
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Common series negative feedback amplifier (2) series negative feedback amplifier shown in series is a common negative feedback amplifier. Wherein R is the resistor current nega..
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Common telecoil is MM formula (magnetic-acting), about 600 in order to take the received signal, should reduce the impedance in the high segment, in parallel with 150pF input p..
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Common-emitter amplifier V502, V504, V506 emitter static potential bias voltage forming circuit [ie voltage follower) shown in Figure 3. Active filter by the V507, VD502, VD503..
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Commonly referred to as automatic amplitude control circuit AGC circuit. It is mainly used in the receiver, the machine when the input signal amplitude change to maintain the o..
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Compare similar products YSS247 has the following characteristics: less external components. The difference is that with SRS5250S, YSS247 just a potentiometer to adjust the sur..
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Compensation is to focus on high-pressure high-voltage capacitor bank focused on the plant installed in the substation 6-10kV bus. Compensation can only be compensated in this ..
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Bias voltage negative feedback circuit ..
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Figure 1-122 is a dedicated high-fidelity surround sound processing IC TDA3810 circuit consisting of surround sound. Stereo signal via the input coupling capacitor cJ, C2 input..
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Figure 1-123 is an internal block diagram of the TDA3810 o The circuit can operate in three modes of operation: (1) may be mono channel stereo signal into an analog signal; (2)..
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Figure 1-30 is an example of an OCL power amplifier circuit, the following specific analysis: In Figure 1-30, VTi, VTz form a single-ended input and differential input single-e..
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Figure 16-29 (a) of the trigger output via a resistor R2; FIG 16J29 (b) for the introduction of programmable single-junction transistor PUT trigger circuit. Adjustment potentio..
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Figure 16-3 (a) one-way thyristor; Fig. 16-3 (c) for the triac. Circuit characteristics: O simple phase shift range 90. [Figure 16-3 (a)], phase shift range 180. [Figure 16-3 (..
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Figure 16-40 three-phase rectifier circuit current cutoff feedback circuit. Figure 16-40 (a) use three current transformers; Fig. 16 40 (b) using two connected in open delta se..
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Figure 2-60 is LM3886 amplifier roar practical circuit, the circuit with one NE5532 as preamplifier, output power up to 200Wo. LM3886 power amplifier for use, due to the large ..
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Figure 289 Star STMicroelectronics (ST) deputy public cattle produced VK05CIl. ASIC production of electronic front desk lamp can be lit 5-15W low-power compact fluorescent lamp..
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Figure 3-142 for the reel control circuit means. Coiler is used to wound with plastic banding (such as grafting with banding tape) of. The length of plastic tape wound on a pla..
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Figure 3-17 is a pre-equalizer amplifier having a sound recording function has the following characteristics: (1) the circuit does not have a conventional mechanical switch cir..
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Figure 4-11 is a feedback attenuator consisting of transistors tone control circuit. The circuit in addition to a conventional high, bass control system, balance control, volum..
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Figure 4-12 is a five-speed type tone selector schematics o as follows: circuit, IC1 and other components electromagnetic phono equalizer amplifier, I bar and external RC compo..
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Figure 4-13 is an adaptation of a common attenuated tone control from the pitch selector. It consists of two magnifications of each of the amplifiers 10, Icl used as a line amp..
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DC motor reverse brake circuit is shown. Braking, press the stop button SB2, disconnect move off contact so KM1 loss of power release, then turned on the brake contactor KM2 ci..
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DC motor is shown in dynamic braking circuit. Braking, press the stop button SB2, the contactor KM1 missing, and released its movable contact connected off, electrical voltage ..
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DC motor E inversion control circuit, the circuit loop L li KDL -. 80 (primer using a single set of normally open/normally record relay contacts when A.B two low, the relay KI,..
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3P10 circuit shown in FIG. It uses a bidirectional thyristor control. Adjustment potentiometer RPi, can change the minimum motor speed f adjustment RP2, continuously changing t..
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3-119 circuit shown in FIG. By combining switch SA, realize stator windings, 2, Y and 2Y connection corresponding to the motor speed n1..
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28 is 45V/8A brushless DC motor driving circuit diagram. It is an open voltage-controlled, adjustable by one pin external potentiometer adjustment of the PWM duty cycle, the av..
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The excitation device for light duty synchronous motor 625kW initiated. Triggering the device circuit consists of three ..
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Circuit shown in Figure 3-151. Figure 3-151 (a) of the capacitor banks connected into shape,..
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FIG, T is the excitation transformer, R, varistor, rectifier diodes to protect against VDii ~ VD16 breakdown; Rz, C2 resistive capacitor protection..
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R "h sampling circuit limit order _" to reduce the sampling resistor. Plus DC voltage level can be placed between the..
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A DC motor reversing circuit using non latching push button switches. Relays control forward, stop and reverse action, and the motor cannot be switched from forward to reverse unless the stop switch is pressed first...
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Here, S1 and S2 are normally open , push to close, press button switches. The diodes can be
red or green and are there only to indicate direction. You may need to alter the TIP31 transistors
depending on the motor being used. Remember, running under....
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This is an experiment on the closed loop DC servomotor control system (SMC). It will able to be used for practical use with/without some modifications. The closed loop servo mechanism requires real-time servo operations, such as position control, velocity....
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This circuit can control a small DC motor, like the one in a tape recorder. When both the points A & B are "HIGH" Q1 and Q2 are in saturation. Hence the bases of Q3 to Q6 are grounded. Hence Q3,Q5 are OFF and Q4,Q6 are ON . The voltages at both the motor....
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The 74AC240 stepper driver works by alternately enabling each half of the buffer. Only one half can be enabled at a time.
Let`s assume that the top half of the driver is enabled. U1A & U1B along with R8, C1, and the input protection resistor R7 form....
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Stepper motors are useful in many consumer, industrial, and military applications. Some, such as personal-transportation systems, require precise speed control. Stepper-motor controllers can be simple (Figure 1), but they require a variable-frequency square....
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Fan-control circuits range from simple switches that boost the fan speed at a certain temperature, to digitally controlled fans with continuously-variable speed. High-speed/low-speed switches are inexpensive, but the sound of sudden speed changes can be....
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Fan noise is becoming a significant issue as electronic equipment increasingly enters the office and the home. Noise is proportional to fan speed, and the airflowhence, fan speednecessary for cooling is less at low ambient temperatures. Because ambient....
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Controlling a small dc motor without speed control sounds like a trivial task; a switch or a relay should suffice. However, several problems accompany this approach. For one, the switch, because of the inductive load and the low starting resistance of the....
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The two-chip circuit in Figure 1 provides fan control and overtemperature warning and shutdown signals to protect systems from excessive heat. The circuit monitors the temperature of the pc board and the die temperature of a CPU, an FPGA, or another IC with....
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During the development of systems that include small motors, a simple, bidirectional motor controller with speed adjustment may be helpful. Figure 1 shows such a controller. The circuit uses everyday components whose tolerances and ratings are unimportant as....
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Class D audio amplifiers provide a dual benefit for battery-powered portable devices (Figure). They enhance battery life, and they produce much less power dissipation than do their linear cousins. Those features make Class D amplifiers ideal candidates for....
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As Moore`s Law plunges us into the realm of multigigahertz processors and PCs with gigabytes of RAM, engineers face the task of removing the heat that these state-of-the-art components produce. Cooling such systems poses a dilemma. If you optimize the fan....
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The interface uses a PIC16F876 microcontroller and not much else. It performs channel mixing, current limiting, and noise rejection. Push the stick forward, both motors move forward, move the stick to the left and the robot moves left. It makes the robot....