Top Circuits Page 115
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This is an easy to build X-Y oscilloscope. To try this an ATmega324P and two KAD0820 (same as National Semiconductor`s ADC0820 ) were used. Originally this oscilloscope was built around an AT90S4414 hence the external AD converters. Some rose and Lissajous....
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The LM78XX series typically has the ability to drive current up to 1A. For application requirements up to 150mA, 78LXX can be used. As mentioned above, the component has three legs: Input leg which can hold up to 36VDC Common leg (GND) and an output leg with....
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This variation on my Digital Setting Circles project was created by Craig Combes. He provided the following content so others could recreate his version. Thanks, Craig! Many people use Dave`s serial DSC board with a serial to Bluetooth adapter and that can....
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Setting circles on an astronomical telescope are used as an aid to pointing the telescope at a particular object in the sky based upon the object`s celestial coordinates. However, setting circles can be difficult to use effectively and are usually not....
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The serial version of the DSC circuit described in these pages is readily adapted to use with a USB-serial conversion cable. In fact, FTDI makes the TTL-232R-5V cable that converts TTL-level serial data coming straight from the PIC into USB for the PC. Using....
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Arduino sketch and other useful information about driving a brushless DC motor, such as DVD drive spindle motor, using Arduino or another MCU..
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Building a stroboscope (zoetrope) from Arduino and the spindle motor of a broken Xbox 360 DVD drive. Zoetrope animations, Arduino sketch and circuit diagram included..
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While I`m getting ready to rip open some 10+ broken DVD-RW drives coming to me from an eBay seller, I though it would be great to have a testbed for the bipolar stepper motors I will harvest from those. I have a bunch of ULN2803AG Eight Darlington Transistor....
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A simple circuit that can be used for testing of bipolar stepper motors or for manual positioning using steppers. Schematics, Arduino sketch and video here..
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Convert a nice but ordinary chocolate box into a raging LED Blinking Inferno with ATTiny13 AVR chip, Arduino IDE and a handful of electronic components..
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Smart Valentine`s Day gift - a movement-sensing box of chocolates with an LED message! Circuit diagram and How to build the project on ATtiny13 and Arduino...
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A video and the circuit with schematics for connecting and controlling the world`s smallest linear actuator based on a bipolar stepper motor from a Bluray drive...
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Some months ago I ordered a EM-406 GPS module from Sparkfun. I intended to explore geotagging and this module seemed to be a simple one to use : integrated antenna, SiRF III chipset (seems to be well know on forums) while not too expensive. You provide a 5V....
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To connect it to the ATMEGA168, I followed the suggestion from the datasheet: the buzzer if driven by a 2N3904 NPN transistor and a diode protects the transistor from reverse currents from the magnetic inductance. /* Setup PB1 as an output */ DDRB =....
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The SD card can be talked to with three different transfer modes: 1-bit SD mode, 4-bit SD mode and SPI mode. According to Wikipedia, all cards must support all three modes except for micro SD where the SPI mode is optional. I will nonetheless try to read my....
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The designer requires 1 Wire host computer IO framework of adopting the drain and opening a way, work in 1. 8V. Majority 1 Wire is unable to work in 1. 8V from the device. Note of this application has recommended realizing 1. 8V 1 Wire host computer and 5V 1....
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The shortcoming of the inductive ballast is that volume and weight are larger, one`s own power consumption is great, there are noises. The electronic ballast has low-voltage starter, non-stroboscopic, has no noise, energy-efficient, immediate advantage in....
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With the increase of the modern electrical equipment kind for vehicle, the increase of the power level, there are more and more patterns of power needed, including AC supply and direct current power supply. The power needs to adopt the switch converter the....
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It is ADC0804 to be left-handed, it is 74HC573 latch to be right hand, the latch connected the one-chip computer and has not drawn at the same time. The pin CSAD of ADC0804 is a chip selection pin because acted as effectively by the low level Hand over 0....
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This text give reader it introduces another that Is produces to be central to seek the smooth robot as top management by 74HC240, still carry out low technology, low-cost making idea, enjoy together with everybody. The threshold voltage of the Schmitt....
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Generally, during power up of the apparatus, the capacitor is the main reason that surge current emerges, the synoptic diagram of the principle is shown in Fig. 1. Have it in the picture after K1 closes, the intersection of capacitor and C begin, charge,....
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As everyone knows, any closed loop system is unit gain to noise temperature ratio l in the gain to noise temperature ratio, the phase shift that and inside varies with frequency is at the time of the 360 deg, there will all not be possibility in this closed....
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The ADI Company one ADM1066 is it monitor one piece powers many kinds of of configurated /sequence device, and last 12 ADC and 6 8 DAC of voltage output, all voltage is superior to 0. 5% in the precision of 25 degrees of C, is mainly used in the office....
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The on-off-type DC/ DC converter has two kinds of operating modes: One kind keeps the switch duty cycle worker constant, the controlled switch turns on time sha. Pulse length modulation PWM of n Way; Ton is constant that another kind keeps turning on time,....
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DTMF dual tone multifrequency The signal is a commonly used signalling in the telephone network, no matter on home telephones, cellular telephones or SPC exchanges, adopt DTMF signal transmission receiving numbers more. DTMF technology can also be used for....
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The system regards DSP56F826 chip as the key control module, uses the sensory chip of CMOS digital image, reachable 640* 480 picture element of definition that the picture is gathered. When needing the vision which carries on the high-resolution to be....
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Designing the target designator on the basis of MSP430F149 one-chip computer, in order to meet the army field and set up the goal fast while training, and can be according to the needs of different tactics flexible to reveal the goal and bomb some, etc.....
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The technology of data acquisition is the important branch of information science, it not merely employs in intelligent instrument, and in modern industrial production, military science is used widely, no matter proceeding control, condition monitoring, or....
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Luminescent diode LED Made of GaAs of special semiconductor material, gallium arsenide photphide, etc. can use singly, also can assemble the segment type or lattice LED display device semiconductor display device of the composition. Display unit of sectional....
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This device is based on PICl6F628A one-chip computer, adopt one pair and receive and dispatch the independent ultrasonic transducer, utilize the Doppler effect, can detect in certain space whether someone enters effectively, and can output the switch of the....
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The inverter is kinds of direct currents can battery, storage battery Change into alternating current generally 220 volts of 50HZ sine waves or rectangular waves Device. Our common emergency power supply, 220V exchange to generally all invert the direct....
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The requirements for electric energy quality of modern industrial development are higher and higher, how to offer the safe and reliable green power to energy consumer is a focus of area research of the power at present. UPS, as a kind of incessant power....
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Tape isolate single-phase PFC that DC/ DC vary make up, make up two cable, PFC of three-phase, that single-phase PFC make up in parallel directly in Ausgang by three single-phase PFC in parallel respectively by three The road is formed by matrix type DC/ DC....
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CAN Controller Area Network Bus line, namely control device LAN. Because of having high performance, high reliability and unique design, CAN bus line paid attention to more and more by people. Bosch Company of Germany controls and control system design CAN....
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The battery capacity is the important index of weighing battery quality. There are many methods in the volume test of the rechargeable battery. Can be according to the discharge curve of the battery, carry on short time and discharge, thus so rough as to the....
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This system is a control system based on one-chip computer, control the system light in remote-operated way. This scheme mainly solves transmission and receiving of the signal, the program manipulation to different signals after the the signal one is dealt....
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The technology of range finding employs extensively in civil, industrial fields such as measuring, medical flaw detection, car anticollision of position of the material, etc. , because the ultrasonic speed wants to the velocity of light it is much smaller,....
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Inverter of what this text produces see Fig. 1 Mainly by the MOS field effect tube, the ordinary power transformer forms. Its output power depends on the power of MOS field effect tube and power transformer, avoid the convoluted voltage transformer to wind,....
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The defect that can`t be overcome exists in some special occasions in some traditional distance measuring ways. For example, the measurement of liquid level is a kind of range measurement, the traditional electrode law is to adopt the location of difference....
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The touch control screen is not any fresh thing, present electronic product basically all have a colored liquid crystal greatly, add a touch type touch control screen. It is very convenient to use, can totally replace that kind of fixed key set in the past.....
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Peripheral circuit is very simple, it is DAC schematic circuit diagram of the USB interface which adopts PCM2702 to make the picture, the Ausgang of circuit can be connected with the power amplifier directly, can drive earphone of more than 32 ohms too...
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This text regards MSC1210 as the cores of measuring, SIGPROC signal processing and communication, has designed the module of acquisition system of high-accuracy temperature. It is easy to expand that this system measures the passway, survey accuracy is high,....
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The optically-controlled circuit has essential function in urban street lamps or corridors are lighted, adopt the optically-controlled circuit, can open and shut off the lighting lamp automatically according to power of the light, make sure nobody....
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Under the loading condition of the resistance, output voltage Uo variable range: 30V~36V; Maximum output current LOmax: 2A; When U2 becomes from 15V to 21V, the regulation factor SU of the voltage is less than or equal to 0. 2% Io =2A ; When Io becomes from....
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Difficult to observe in order to solve the leaning phase in adjusting the electric transmission line manually, record and difficult and normalizing three major difficult problems this difficultly. This design passes the design of the software and hardware,....
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Because switching power supply energy-conservation also brings the huge economic benefits, cause the attention of the various circles of society to be popularized rapidly. With the technical development at full speed of power, high frequency, becoming the....
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At present, it is numerous to adopt the telephone line as long-range control and alarm system of the transmission medium, associated too more research [1, 2 ]. This kind of system is generally made up of alarm device and calling the police to accept the....
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The Brusless DC motor of permanent magnetism is a new electrical machinery with new principle, innovative technology, new method at present, it is by the Brusless DC motor body of permanent magnetism BLDCM, trochanter position transducer RPS And control....
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With the quickening of the modern rhythm of life, the frequency happening in traffic accident is increasing too, in order to improve the safety that the car runs, this text introduces the mechanically controlled car anticollision alarm system of a one piece.....
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Its basic function is frequency and cycle of the measuring signal, the application of the frequency counter is in a very large range, it is not merely applied to general simple instrument measurement, and apply to other fields such as teaching, scientific....
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The starting ability of the power of intermediate frequency is the most important performance index, quality and usability of its quality direct influence apparatus. So, it has focal point and difficult point that has studied in the industry to start the....
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It uses good stability, precision to be high outputting the direct current stream source that can be presetted often in electronic device. The numerical control direct current stream source that this text designs can well lower the output error caused....
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IC bus line explains conduct and transmits the bus line as one kind, it uses and is wired little, simple in construction, it is the extensive high-performance bus line way of a application. The operating system that and Linux cuts out publicly and easily as....
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We know, the maximum coverage of RSR232 serial port Transport Protocol is 10M, and the wire transmission, this needs remote transmission control to bring very great inconvenience for some. According to the needs of subject, we have designed one kind because....
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Main matched LG26 one inch of screens of FSP107-2PS01 two-in-one electrical power package, direct drive CCFL modulator tube, its material object is shown as in Fig. 1. If cooperate with other producers For instance Samsung, AU, etc. Screen at, it is only at....
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The mobile robot should run under the unknown and uncertain environment, must possess autopilot and avoid hindering the function. The ultrasonic static is used as the range finding sensor of the mobile robot extensively with its characteristic simple, fast....
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Improve the power factor PF Use a energy-conserving important factor of electrical equipment. With the development of electric electron technology, high-frequency active power factor correction PFC Technology has already been more and more applied to various....
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The high-pressure direct current power supply has been already increasingly extensive. The method that this literary grace outputs in parallel with the power of double-channel gets the direct current of the low ripple. Today when the gas switching tube....
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This is a high-speed control scheme LED display screen circuit theory. Adopt the MCS51 series one-chip computer to control LED display screen; The random access memory 62512 is used as the data storage of LED display screen, store the matrix data waiting to....
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Multisim is the simulation software of circuit based on SPICE, SPICE Simulation Program with Intergrated Circuit Emphasis lay particular emphasis on the simulation program of the integrated circuit Abbreviation, it is here 1975, from University of....
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The electronic device feel the proximity which measures the user fast. But the distance that most proximity sensors survey is relatively short on the market at present, 1~10cm generally, and infrared rays LED whether multipulse mode for a long time launch....
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Can reduce the electric current ripple on the Filtering capacitance greatly while adopting this kind of structure, thus has reduced and filtered the size of inductive magnitude and whole DC-DC converter greatly. This kind of converter operates the....
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The large-scale LED display system adopts the line by line scan and lists the driving means to save the expenses of hardware, it adopt 1/16 it is non-interlaced scanning mode, LED display screens large-scales whole it last 16 pieces all right. The picture,....
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LED guard-rail tube has another name called beautifully the tube, it is a kind of advanced LED decorative illumination lamp decoration products. Use LED of red, green, blue 3 kinds of colors as the light source, has used microelectronics and digital....
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A steady, flexible, convenient traffic light control system to have necessity and realizability. But a lot of traffic lights are switched over according to a time interval in actual life. And the traffic lights can be according to changing the switching time....
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We introduce an inverter today mainly by the MOS field effect tube, the ordinary power transformer forms. Its output power depends on the power of MOS field effect tube and power transformer, avoid the convoluted voltage transformer to wind, suit electronic....
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So long as the visitor stretches out one`s hand and crosses the black harp of that entire body, the tone will be played . Why is not there the string to play S..
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CN3052A/CN3052B/CN3056 the high-performance linear lithium battery charge manages the chip. Integrate power tube within these devices, do not need sense resistor and choked flow diode of external electric current, only need few peripheral components and....
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The system adopts the modular design, the one-chip computer AT89S52 and CPLD is CPU of the overall system, the coordination of the control system. Set up the cycle of the systematic pulse signal through 4G—4 key set module at first, choose the output mode of....
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The electric fan of remote control is to do a large amount of research and development and production in Pearl River Delta area of Guangdong in initial stage of the 1990s, and there is specialized mask chip that serves as top management chip, I have done the....
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The thermocouple of the Model K is present industrial production, one kind of more common temperature sensors of scientific experiment, inner liquid steam of subject brightness range of Centigrade 0- 1 300 in various production for its all right direct....
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As demand for VRM output current being bigger and bigger, the components and parts of SR-Buck converter can not already meet the demand for the microprocessor 100 A of new generation; In addition, the filtering inductance of making the heavy current is very....
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Traditional UPS adopts the circuit control of simulation, as to manufacturer and user, no matter accuse of technology or SPWM technology, there is a great deal of limitation in analog control. With the development of information technology, high-speed....
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The NCP1072/NCP1075 products integrate a fixed frequency current mode controller with a 700 V MOSFET. Available in a PDIP 7 or SOT 223 package, the NCP1072/5 offer a high level of integration, including soft start, frequency jittering, short circuit....
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It is obvious, a slice of SM2965 includes canonial 80C32, FLASH, E2PROM 28SF512, SRAM static data storage And WDT watchdog`s timer SM2965 is that the cost performance is extremely quite high The one piece Computer. And its ISP characteristic makes FLASH....
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FAN4810 work, to the average current, electric current of front continuously CCM The work pattern of voltage output rises, the internal treble safe detection technique can make the circuit avoid making the circuit not in normal operating conditions because....
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This digital frequency meter of circuit is succinct, software potentiality is fully excavated, the survey accuracy of the low frequency band is high, have prevented the invasion of the interference effectively. The distinctive quality has embodied in and....
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The gas detector designed this time is that have adopted the intelligence taking ARM microprocessor as the core to measure the control equipment, it not merely adopts the internationally advanced one-chip computer microprocessing of 1990s, also have the....
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The intellectual wireless signal transducer was for major transducer and typical sensor to output signal design, so analyze their own outcoming signals at first. Usually the output of the transducer is 4- 20mA standard electric current signal. And to sensor,....
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It is developed that the ones that assist driving system intelligent improvement and car electronic system that demand to the car as people are networked, new radar for back running vehicle should can serial range finding and reveals the distance of....
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We have designed a walkie cardiotachometer, it can substitute and carry on the metric classic method with pulse auscultator, etc. , it is very convenient to use. This product mainly includes three parts: Collection, data processing and LED of the signal....
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The variable frequency power supply, as the important constituent element of the power system, the quality of its characteristic concerns security and reliability index of the overall system directly. Such prominent advantages as the modern variable....
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The mine railway connects the national railways and intermediate links of the mining area, it is the important constituent element of the transport network of the railway. Relevant materials statistics show, the Chinese mine railway exceeds 20, 000....
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With the aggravation and improvement of human environmental consciousness day by day of the energy crisis, the development and utilization of new energy is paid attention to more and more by people. And the solar energy has been favored by people recently as....
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Take precautions against the coefficient is low, the safety is bad, the applicable space is smaller and smaller. With the development of science and technology, people develop already the intersection of door and magnetic, touch-type, the intersection of....
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With the wide application of SMT technology in products such as the computer, network communication, consuming electron and car electron, etc. , the assembly of the electronic product prones to complicating, high precision, melting and multi-functional....
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In the production field, realize the automatic detection of the water level and control a critical technology that is the industrial process control, have important meanings in the automation level which improves industrial process control. In life field,....
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The water resource is being turned into a valuable rare resource. So, popularizing the water-saving irrigation has already become countries all over the world in order to relieve the water resource crisis and realize the inevitable choice of agricultural....
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Linear whether three phases step down voltage regulation power control unit of the switch synchronously in LTC3731H of Company, can drive connecting the power N-MOSFET of all, specified the intersection of operating temperature and up to 140 the intersection....
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