Top Circuits Page 55
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Electronic Table (1) Introduction This schematic circuit having two alarm output by the timer by thyristor controlled. Can any on/off, and shut down after the power supply from..
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100W resistance triggered doer control circuit It is dragging the arc welding machine control circuit of the most simple kind. Adjustment potentiometer Rr, can change the DC mo..
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Digital controller password as shown by the nine-digit password, and a total of 11 keys, including four pseudo-code keys, 7 keys have two valid keys for the overlay keys, the n..
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Disinfection cabinet circuit principle is the use of infrared heating, in a closed cabinet to create a high-temperature environment, tableware disinfection. Circuit shown in FI..
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As shown, B2 (13), B3 (14) for the Hall current sensor; FU9 (9), FU10 (10) for the fuse; AP646 alarm signal for the fuse board; terminal X24, X26 and X29 is a user interface panel; XT for the outlet...
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Single-phase rectifier DC welding power load from road circuit is shown. Contactor KM use CJ20-40A, 220V. Adjustment potentiometer RP, ensure arcing , the relay KA2 reliable release...
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C620 lathe Y- conversion and other power-saving circuit to the motor reversing or not reversing it, although not by reversing contactor control their machines, such as C620, C630, etc. CW61100A lathes, radial drilling, milling,..
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Drawing, Triac V trigger voltage is less than 1V, trigger current less than 30mA...
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DK-5A, DK- 5AD AC power control circuit circuit shown in Figure 6-77. Figure, SBz the closing button, YA line for the closing electromagnet coil, U.,..
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NE555 tour allows just as vibration. } E input pin 3 River) pulse frequency ult / 5 ~ 20Hz Fan Cave weeks bamboo. Barrel section to ridicule steep scheduled for R and C. Value. m transistor 1j and T} Hungary throw success rate system level power output fl1....
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The circuit uses 50 BUZ23 field effect transistors connected in parallel, tube blocking voltage of 100V. Required control power is extremely small, and there will be no second breakdown and conduction zone positive temperature coefficient phenomenon...
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A discrete transistors by the current control circuit diagram of the way ..
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A typical electronic volume control circuit It shows a typical electronic volume control circuit. The circuit is often used in stereo audio devices through the computer (CPU) i..
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A, B and two electric motors (or electronic) allowed simultaneous operation (interlock control). The two motors can (or electronic) of the respective contact normally closed co..
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A. B, C for big power split phase I, A + BC Rang generator phase line, A-A indole path string has a 2H220V/15W bulbs, bulbs recovery as both macro instructions J Sweet World as..
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AC welder is intermittent operation, the intermittent load power consumption during the period up to several hundred watts. AC welder saving controller circuit shown in Fig. Th..
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APM-81 lift the main circuit, the safety circuit and brake circuit: ..
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According to the characteristics of the system, using the drum controller to achieve the above requirements, the design of the ladder as shown in FIG. As follows: 1) C631, C633..
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Activities Modern exhibition, advertising, promotion and propaganda extensive use of sound, light, electricity technology, a number of electrical diagrams, control model, commo..
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Adjusting the phase potentiometer RP, can change each corresponding thyristor vl-V. Conduction angle, thereby changing the applied voltage across the load size. ..
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Adjustment potentiometer RP, can change the thyristor Vl, vz conduction angle, thereby changing the applied voltage across the load Rfz size. ..
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Agriculture and electrical power harrow plow power cord must be used four rubber cable, wherein a core wire as a ground wire, traction machine housing must be grounded. Two tra..
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Another JYB type liquid level controller 119 internal circuit shown in FIG. This circuit uses the Schmitt trigger circuit (VTZ, VT3 composition), so that the action level contr..
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Another example of Figure closed loop speed control. It is a single voltage supply and L298 with integrated H-bridge power amplifier (24V). Like the previous example, it is als..
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Another method is to elicit a motor counter electromotive force from the motor end of the associated signal after amplification averaged as 3 pins. By the drive output of A as ..
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Another solution would be to improve the current feedback signal to an error amplifier summing junction incorporated into, a current feedback loop to increase. Figure this scen..
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Application Example A photovoltaic control circuit, the figure of Triac is called solid state relays, load it provides AC power supply path. To achieve high current control sig..
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Application circuit works the device as shown below. For cooling electrical equipment, usually with a cooling fan to drive heat. LCE made use synchronous control socket on the ..
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Application circuit works the device as shown below. Generally shared TV antenna amplifier and power switch user is isolated. Sometimes no one can work the TV, the antenna ampl..
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Artificial hatching or breeding tropical fish, while watching the fish pond need to configure add oxygen pump and circulating pump. Plus oxygen pump and circulating pump long-t..
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As a result of the power switch integrated circuit A, it has a simple circuit, the sensitivity is high, working and reliable. It belongs to the people filling liquid level auto..
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As applied to a concrete circuit relay. Transistor VT is high-speed, high- voltage switch is. Switch voltage requirement is 5-10 times the rated voltage solenoid valve. Fast re..
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As shown below for the non-contact lantern control circuit. The controller includes integrated music CIC2851, drive BG1 and BG2, thyristor SCR and other components. When the sw..
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As shown by INA326/327 constitute a single power PID (proportional - integral - derivative) as shown in the temperature control loop. The circuit is mainly to complete work on ..
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As shown for the voltage-controlled gain amplifier. Use FET gate voltage and the drain - source resistance between RSD to approximate logarithmic relationship may constitute a ..
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As shown in FIG controllable integrating circuit. The circuit has reset to zero, and to keep different integration time constant controllable integrator. The analog switch is C..
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As shown in the one-button control switch with one button control two relays, two respectively turned negative as needed Load power switch. Circuit mainly by a hex inverter CD4..
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As shown in the timing control circuit is a sequential circuit, the circuit can be carried out sequentially timed control of the two switches, control time can be adjusted from..
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As shown thyristors - linking arm rectifier module three-phase half-controlled bridge rectifier circuit. Thyristor - rectifier module linking arm is made of a thyristor and a r..
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As shown, mainly by the NAND gate IC1 (CD4096), counting/timing distribution circuit IC2 (CD4017), the analog electronic switch IC3 (CD4066) and the D flip-flop IC4 (CD40174) a..
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At dawn, the light is irradiated onto the photosensitive resistor RL, it reduces resistance This switch ICs (2) exhibits high electrical foot. I. lC end, the relay K does not s..
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Attached to the wall is a high-rise building construction elevator indispensable vertical transportation machinery. Its drive motor usually wound wire induction motor. Using th..
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Based on the classic Baxendall tone control circuit, this provides a maximum cut and boost of around 10dB at 10K and 50Hz. As the controls are passive, the last transistor prov..
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Because of the high rhythm of peoples lives. Tense, intense competition, many people suffering from insomnia, pose a threat to health and work, for this section presents a feas..
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Bidirectional thyristor control, control the very trigger voltage output from the step-down transformer T 12V (when the water is turned on electrodes). It belongs to the withdr..
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Boiler control circuit for controlling the temperature of water in the hot water heating system, often used comparator s comparison function to control the heating equipment. I..
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Breaker manually operated mechanism widely used type CS2. AC power operation manual operation control signal circuit shown in Figure 6-68. Figure, wc for the control of small b..
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Bridge crane control PLC ladder design Detection retract mechanism ladder hide programming manual and automatic operation of two run automatically follows Runtime: 1) When the ..
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By R. RP, DW, f TV over the composition of the discharge control circuit: B, consisting of n Island and over-discharge circuit prompted the stage Ji pod K. Gracilaria battery v..
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By two NAND gates Di, Dz and resistor Rz, capacitors Cl etc. RC self-excited multivibrator oscillation frequency 2. 5Hz, the oscillation amplitude is 4V. Using as probe tempera..
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CA3062 combined photodetectors and power amplifier in response to the optical signal generated by the on/off output. Integrated circuit transistor output saturation should be o..
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Capacitor filter is adopted frequency control circuit commonly used anti-jamming measures. (1) frequency interference clamor of wiring in the cable core wire 4-20mA control plu..
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Cats are predators of rats, the use of electronic devices to simulate mew Repeller is an effective method. Because it is an electronic device, mew big or small, can be fast or ..
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Circle i {JA, C two-phase grid connection line. a. c technology turbine shed two lines. A, a voltage between Ri by Buck, convex - Diu chain flow. R., R3. wl dividing aftercrop ..
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Circuit from the main circuit, trigger circuit, speed negative feedback, negative feedback differential voltage, current cut-off circuit, loss of field protection and other com..
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Circuit is shown. (1) DC power circuit power switch S3, 220v AC voltage by T Buck, UR rectifier, C3 and C4 filter, generating + 9V voltage, supply Kl drive control circuit, a b..
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Circuit shown in FIG. Circuit by the battery, the controller, with electrical and charging parts. Wherein: Zener diode DWl, resistors R1, R2 composition undervoltage detection ..
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Circuit shown in Figure 11-14. It uses a one-way thyristor, is poured into the liquid level automatic control circuits. Electrodes for detecting sensing element for water or ot..
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Circuit shown in Figure 3-148. The circuit eliminates the need for step-down transformer, using thyristor for brake control, for small capacity asynchronous motor braking amoun..
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Circuit shown in Figure 3-168, which uses the controller SA grading speed and reversing control; reverse brake connected to the rotor circuit overcurrent relay KI to control; c..
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Circuit shown in Figure 3-22. Figure, KMi and SBi are forward contacts and forward buttons, KMz and SB2 are reverse contactors and reverse button, SB3 for the stop button. ..
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Circuit shown in Figure 3-76. It uses two time relay to achieve control. KTi and KTz control the motor running and downtime. ..
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Circuit shown in Figure 3-78. The time line also use two relays to achieve automatic control, but the line structure than simple. The line can be achieved intermittently motor ..
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Circuit shown in Figure 3-79. It consists of two delay circuits, respectively. RPi adjustment potentiometer and RP2, respectively, can be changed and stop the motor running the..
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Circuit shown in Figure 3-80. Which controls part of the transistor multivibrator. Multivibrator is a strong positive and negative feed-forward amplifier, its two branches are ..
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Circuit shown in Figure 3-81. The circuit uses a transistor delay circuit to achieve start-stop cycle control. You can take the hand moving and automatic manner. Circuit is pri..
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Circuit shown in Figure 3-82. It uses 555 IC A motor to achieve automatic control of start and stop cycles. Adjust potentiometer RPi and RPz, respectively, to change the motor ..
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Circuit shown in Figure 3-83. The figure shows that only when the contactor KMi after pull (ie, after the motor Mi first start), KM2 to pull (ie Mz after start) ..
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Circuit shown in Figure 3-84. Be seen by the two electric motors can be started separately. But only when you press Host (Ml) of the stop button SBz (after contact KMi release)..
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Circuit work process is: When the momentary switch S between, since the voltage across the capacitor can not change suddenly, the Pi C zero voltage across the SCR vs no trigger..
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Closing switch S, the power supply positive half cycle, the power by VD1, Rl, VD2 to charge the capacitor C, C at both ends of the electrical pressure gradually increased, but ..
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Figure 1-87 is a good loudness volume control circuit, it uses an ordinary potentiometer, used element pieces are scarce, but the effect is quite remarkable. The electric road ..
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Figure 1-89 is an example of loudness control circuit. Potentiometer from the ground 30% of the total resistance at the tap. When the slide arm when screwed to the tap position..
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Figure 3173 is a mechanical braking, dynamic braking, reverse braking function wound rotor induction motor speed can be positive and negative control circuit. Figure, KI, to st..
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The compact high performance 4 x 4 crosspoint shown in Figure 1 uses four LT1205s to route any input to any or all outputs. The complete crosspoint uses only six SO packages, and less than six square inches of PC board space. The LT1254 quad current feedback....
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Crosspoint switches are ideal for use in video-security systems, which accept multiple camera inputs while providing playback and multiple loop-through to multiple monitors. To provide video loop-through or monitor outputs, these systems often require....
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This design note presents a voltage controlled cable equalizer based on the LT1256 video fader. The circuit features ease of adjustment, simplicity and the capability for remote control. The amount of equalization can be adjusted continuously from the....
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The first idea they was to work with 8.867238 MHz crystal (2 times the color carrier). When I read more about PAL video composite signal creation, I saw that, if you want to product colors entire-in-software you must to create the color-carrier (4.43 MHz),....
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When you`re copying videotapes, it`s sometimes desirable to suppress some passages. Using the pause control of the recorder does not yield satisfactory results. Another method produces better results (Figure 1). The video source connects to the video-in....
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A number of single-chip VGAs variable-gain amplifiers are available today. Unfortunately, they all have drawbacks, such as high noise, 55V limit, low input impedance, or nonlinear gain/frequency characteristics. The circuit in Figure 1 is a 16-step,....
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The difficulty of connection vga of a videocard to the TV set is, that Frequency of lower case development(display) of the TV set makes 15 KHz, and VGA card - from 31 KHz and is higher. Translation of development(display) of the TV set up to 31 KHz....
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The technique applies to highpass filters. You derive a composite highpass filter by using m-derived terminating half-sections with one or more constant-k interior full sections. Classic image-parameter design used m-derived half-sections with m=0.6 for best....
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A crucial point in the design is the input/decoder section, and the question of what ICs to use for decoding the input video to component digital video streams. The choice for this project was the Philips IC SAA7114H, new on the market at the time. This chip....
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A 2N3904 in the base circuit sets the `Q' point of the amplifier. FM subcarrier audio at 4.5 MHz is also injected at this point through a 3300 ohm resistor and a DC blocking capacitor. A high frequency 5-watt RF power transistor (2SC1909) serves as the last....
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The 12VDC supply provides power for the camera and video modulator circuits. The video from the camera is fed into the video input of the modulator circuit. The modulated RF from the modulator is fed into a small antenna. Use of a dipole antenna that is....
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Video designs are often pressed to operate on the lowest possible rail voltagesa simple result of the trend towards lower voltage logic and the advantages of sharing supply potentials wherever possible...
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VID2G project is an PAL/NTSC color generator & video identifier with digital sync regeneration, digital PLL, video Squelch output, predefined video pages, keyboard & full RS-232 access, etc. Dynamic and fixed ID`s, user positions, user selectable....
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This is a very basic circuit for fading video signal shown in Eletor Electronics magazine. You can use this between two video equipments. The circuit is so simple that the impedance matching and some other things are not exactly correct, so might not always....
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The block diagram in Figure 1 shows how to make a cable-free, direct-video system. The system allows users to walk from booth to booth at an exhibition to interview people and to display the interviews in real time on three screens at key locations...
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Often you can get away with running a monochrome monitor on GREEN, but this looks real crappy when viewing color images. These simple resistor networks allow you to display R+G+B on a B/W or CCTV monitor without ghosting. Be shure to set your video card for....
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Test signals inserted in the lines of the vertical blanking interval, defined by the TV standard, e. g. for the 625 standard the CCIR together with the EBU issued the formal specifications for the signals inserted in lines 17, 18, 330 and 331...
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The idea to produce a standard TV PAL signal using a SVGA graphics card was born a few years ago, where cheap graphics cards with TV output were still not available. To achieve a CCIR conform TV signal with 50 Hz vertical interlaced refresh and 15.625 kHz....
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This design was published in the June 1994 issue of Electronics Australia, and has proven extremely popular. The kit was sold by Jaycar Electronics, but has since been discontinued. It is a simple device that connects between your keyboard and VGA card....
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The synchronous oscillator (SO) and the coherent phase-locked synchronous oscillator (CPSO) are universal multifunctional networks that track, synchronize, and amplify as much as 80 dB; improve SNR by as much as 70 dB; and modulate AM, FM, and FSK signals...
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This is a video scan converter to display NTSC video signal into VGA monitor. Normally, the VGA monitor occupies most desk top space, so that everybody will be thinking that if the VGA monitor can be used for video monitor...
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The following design is capable of overlaying the time and date onto any existing PAL (or optionally NTSC) composite video signal. It is housed in a very neat and compact standard moulded casing and has standard 75ohm RCA video inputs and outputs. A single....
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This VGA to TV converter is designed to connect VGA card to a television which has suitable 21-pin AV connector for RGB input (called EURO/SCART/Peritel connector). if you Tv does not have this kind of connector, then you can`t use this circuit.
The....
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First circuit is for connecting VGA card to video projector or a monitor which accept VGA card frequencies and has RGB + Composite sync input. This circuit has been succesfully used with Electrohome Projection Systems ECP 4100 data and video projector. This....