New Circuits Page 189
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Comparing the performance of 1200V silicon carbide (SiC) MOSFETs with 1200V silicon MOSFETs and IGBTs at high frequency is critical to establish the difference in device losses and power-handling capabilities between the technologies. Using a demonstration....
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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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Most of the IR remotes work reliably within a range of 5 metres. The circuit complexity increases if you design the IR transmitter for reliable operation over a longer range, say, metres. To double the range from 5 metres to metres, you need to increase the....
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This circuit enables the on/off times of a 555 timer to be independently varied over a wide range. This is not possible with a conventional 555 circuit wi....
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The employment of the circuit IC1 which build survive astable multi vibrator circuit. self-control gesticulate frequency low origin comes exposed the way pin 3 take approximately 1 Hz by frequency charge with the intention of s were fixed by the value, R1,....
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Assuming I can get 5V in example after adjusting the pot in real use, will the 240 ohm resistor limit the current, or do I have to add something else on top of that afterwards If it does (I can have var. voltage + current limit) I assume I will need to up....
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I tried photo paper, telephone book paper, color pages of magazines, dextrin covered paper, the various catalogs of electronic supply companies. I tried different temperatures of the hot iron, higher & lower pressure. I tried different board cleaning....
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The communication technique with the LCD is the same like the last lesson, and for the current experiment we have added a counter which counts between 0000 and 9999. Our counter increments with 1 second delay. /* ` * ` Lesson nr. 16: ` Alphanumeric LCD as....
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The following circuit shows about Cat And Dog Repellent Timer Circuit Diagram. Features: used to maintain a deep cycle battery from a solar panel, ....
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First thing`s first, what software to use I went with CadSoft Eagle primarily because there are lots of tutorials out there covering it, and that seemed like a good place to start. Once I understand the process I can worry about what software I use, but for....
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This is the circuit that sparked off all the other Link Telephone Intercom designs. Originally designed back in 1996 with heavy duty relays and their contact banks, it was updated late last year with the addition of IC1 in place of a simpler transistor....
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As you can see on the circuit, a class AB audio amplifier IC requires only a few external components. And this series is also very easy to build. 10W stereo amplifier circuit requires a stable power supply with a voltage of 18 V and 1A current needs. ..
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A portable CD player, radio, cassette player, a couple of microphones and PC sound card. I am feeding these into the inputs of an audio mixer the output of which is attached to a pair of active loudspeakers. I want to be able to monitor the signal levels....
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Before starting on the receiver side of the` Chatterbox`, we ought to take a final look at the transmitter itself. The Chatterbox transmitter is built separately, because many constructors will want to use it in conjunction with an existing receiver on 1.....
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A high quality microphone preamplifier using a single power supply, suitable for dynamic or electret microphones. The op-amp used can be any low noise, high performance type, e. g. NE5534, TL071, OPA 371 etc Nothing too special here. The schematic is shown....
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The market may be full of these hi-end remote controlled toy cars, but for a hobbyists making one at home can be entirely a different experience. The article belowexplainshow to configure a simple remote controlled toy car using a ready made 4-relay remote....
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Here the NE555 is wired as an astable multivibrator. When the push button switch S1 is pressed the LEDs D1 & D2 will flash alternatively. That is when output is high D2 will glow & when output is low D3 will glow. The rate of flashing will depend on....
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The original smoke alarm circuit has some problems and has left some hobbyists and students disappointed. Rather than to attempt to solve its many problems, I have created an update that uses the venerable LM741 op amp. It is simpler, more conventional,....
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This simple and cheap(but powerful) squarewave oscillator can give oscillation to any mosfet based inverter/ups. The circuit consists of one central I. C CD4047. I used HCF4047BE from ST microelectronics. This is an improved version of circuit spread over....
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Originally Posted by Spokane1 I have just about all of the parts needed for a first run. Mr. Dollard says he used Teflon coated coax, which is....
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Determines exact depth of trawl net under water, for interception of desired school of fish. Continuous depth information is transmitted to trawler by modulated 21-kc ultrasonic beam, along with water temperature. -F. H. Stephens, Jr. , Underwater Telemeter....
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Want to make a set of attention-getting LED running lights? This article provides a circuit diagram and discussion of the CMOS logic and IC layout for a simple sequential LED flasher or light chaser that one can build, including the parts lists. The heart of....
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Changing to a 3-prong AC cord is pretty much an expected upgrade or mod, as is replacing the filter capacitors. Changing the coupling capacitors to Orange Drops or some other boutique brand is also accepted, and often adds to the hyperbole in eBay auctions.....
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Operation of the circuit. Circuit is divided into three parts: low frequency production. The manufacturing high frequency and extension of production low frequency is obtained from IC1 connected to astable multi vibrator circuit frequency is set by R1, C2....
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STMicroelectronics introduces the STV0288 its TM latest DVB and DIRECTV QPSK digital receiver, which adds blind scan capability and DiSEqC 2. 0 to the industry-leading STV0299 and provides a cost reduction path or new products. By STMicroelectronics ..
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The optimum duty cycle and frequency for the strobe photoperiod needs to be determined. In other words we`re flying blind in regard to optimum frequency and duty cycle. The circuit I designed is 3Hz with a 50% duty cycle. I chose this frequency based upon....
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The consumer unit (or electricity meter`) cupboard in some older houses is a badly lit place. If the bell transformer is also located in this cupboard, it may be used to provide emergency lighting by two high-current LEDs. These diodes are powered via a....
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An AM voice transmitter with variable tuning. The antenna circuit is also tuned and transmits via a long wire antenna. Please Note. It is illegal to transmit on the AM wavebands in most countries, as such this circuit is shown for educational purposes only.....
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The SA608 is a low voltage high performance monolithic FM IF system incorporating a mixer Oscillator two limiting intermediate frequency Amplifiers quadrature detector, logarithmic received signal strength indicator (RSSI), voltage Regulator and Audio and....
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The contact less telephone ringer circuit can produce a ring as well as a visual indication when a call comes. The main advantage is that since there is no direct contact between the phone line and the circuit there is no chance for a loading or disturbance....
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Fluorescent dimming systems can satisfy visual comfort, and reduce utility costs through daylight harvesting, demand reduction, scheduled dimming, and other strategies. A dimming electronic ballast is an essential part of this system. To perform dimming....
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The purpose of this page and its sub pages about members of Z80 family (and close relatives) is to collect and share information and good ideas. I know there are lots of people out there, who have developed some good utilities and hardware solutions. Now we....
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Man Machine Sound generator is different type of project in the series of alarm project circuit diagram with description of various type of alarm project ...
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Have your already set up a Christmas tree in your house and decorated it with traditional lights? Build a couple of these led lights to enhance the Christm....
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This could be achieved by monitoring separate points either through the same recorder, or worse still, two separate recorders. In both cases the results need to be artificially summed to get the total current draw. Two problems exist with this, the first....
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These days many more audio-visual devices in the home are connected together. This is especially the case with the TV, which may be connected to a DVD player, a hard disk recorder, a surround-sound receiver and often a PC as well. This often creates a....
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What is a circuit breaker? When do I need an ac power line filter or a phone line filter; How do I design a noise filter; Can I build a homemade surge protection? The following circuit protection can provide several protections you can experiment yourself at....
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Circuits available for indicating water level is usually consist of LEDs to indicate the liquid level. But this circuit uses a 7-segment LED display instead of normal LED`s for numeric display of water level. Moreover, a buzzer is used to alert you of water....
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The intelligent discussion of VHF systems requires a feel for VHF systems, and how VHF energy moves through a system. At VHF, wavelength is very short. Wavelength in feet is F/983. 6, a typical 150 MHz system would have a quarter wavelength of 19. 8 inches.....
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This Sealed Lead Acid Battery Charger is deigned using the LT3755 DC DC controller. The LT3755 is a DC DC controller designed to operate as a constant-current source and supports a wide input voltage range from 4. 5 up to 40 volts and a can provide a maximum....
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A MFM Encoder works according to the principle of time shifting and phase shifting. This method is based on the transmitting frequency and the MFM signals are generated in connection with the double transmitting frequency. More details concerning the MFM can....
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VU LED indicator is simpler and smaller than their analog, and very common in audio equipment. This version is based on National Semiconductor IC, and using the logarithmic version. Each LED operates with a 3dB difference from before, and the jumper is....
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Now, when the construction is nearly done, here is a circuit diagram. When I finally settled on how it was going to be done, and set it down on paper,....
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This is a light sensor circuit which will detect light and switch on the relay. This light switch circuit is very simple and using only few components. Working of the circuit is simple, when the photoresistor receives light it will switch on the transistor....
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Here is a schematic of a simple 555 organ circuit. The circuit is consist of two parts first 555 circuit of organ and second lm386 amplifier for driving 8 ohms speaker. The circuit will generate slightly different tone by pressing each switch from S1 to S7....
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This is V2 update of Atmega8 Volt-Ammeter. This new version features the following upgrades, Low power consumption Better Amperes display resolution while using low value drop resistor. Much smaller PCB size, only 5cm x 5cm. Still no SMD components. Easy....
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Most of us take the mains ac supply for granted and use it almost casually without giving the slightest thought to its inherent shortcomings and the danger posed to sophisticated and sensitive electronic instruments/equipments. For ordinary household....
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Using this design, you can construct an electromagnetically impulsed pendulum clock with a 1-second beat. On the prototype, the pendulum rod is 115cm long with a bob adjusted to make it beat every second. It is suspended on a short piece of mainspring from a....
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This circuit was developed since a number of visitors of this website requested a timer capable of emitting a beep after one, two, three minutes and so on, for jogging purposes. As shown in the Circuit diagram, SW1 is a 1 pole 9 ways Rotary Switch. Setting....
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An Oscillator circuit which can produce a good sine wave with a frequency of at least 500 Mhz. This is for RFID applications. I have tried to use an class E oscillator, but i cant seem to get the design right. Can anyone help me out..
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This project is currently output two PWM signals but can be extended to many PWM signals very easy. The input to the microcontroller is 100HZ pulses as zero crossing. currently it is build for two channel DAC, the input at port1 and port2 of microcontroller....
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The diagram shows the output sampling winding isolated switching power supply. In diagram, T is high frequency transformer; N2 is self-oscillation positive feedback winding; N3 is the error amplifier, and VTSis thewinding to provide sampling signal; N4,....
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This circuit is a Adjustable voltage reference circuits, a voltage source which provides a voltage greater than the reference diode. High precision extended temperature applications of the circuit require that the range of adjustment of VOUT be restricted.....
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The figures(a), (b) are as shown, they are AC measuring circuits. The 21(a) is a current measuring schematic diagram of magnetic balanced mode Hall device. If the magnetic field produced by the measured current IN is B1, then B1 will produce Hall voltage. If....
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Two multivibrators with different frequencies can be built using the NAND gates of a 4011 IC. If the output of IC1. B is positive with respect to IC1. C, LED D1 is on. As the levels of IC1. A and IC1. D are exactly opposite, D2 is always on when D1 is off,....
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This is a design circuit for the FSK demodulator, that is the electronics device that converts the FSK signal to serial digital signal. To transmit digital serial data we use FSK modulation and to get back the digital data at the receiver, we need to....
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AC power is supplied via AC Fuse F1 and Power On/Off switch S1 to 6. 3V filament transformer T1. Fuse F2 is provided as an additional safety feature, since a short to the filament transformer may not be enough to blow the main power fuse. Hum balance pot R1....
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This charger will quickly and easily charge most any lead acid battery. Electronics project, easy to build, with circuit diagram included....
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Charge NiCd or NiMH batteries with solar cells. This circuit extracts the maximum power from a solar array to charge a battery stack. It employs the MAX856 boost converter and MAX982 dual comparator with reference. As a power source, the sun offers some....
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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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This circuit has an adjustable output timer that will re-trigger at regular intervals. The output period can be anything from a fraction of a second to half-an-hour or more - and it can be made to recur at regular intervals of anything from seconds to days....
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Gyrators find application in DC holding circuits which are used in most DAAs (Data Access Arrangements). DAAs typically use dry transformers which can not tolerate DC current, and incorporate a DC blocking cap. When the telephone goes off hook, it must pass....
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I used the first circuit to generate the greyscale video, and mixed in the composite sync obtained from the second circuit, I had tried just mixing in the Hsync and Vsync as per the first circuit but couldn`t get this to sync the TV. The adapter itself is no....
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This circuit is used in impulse speed modulation system. In this system, transmitter change impulse speed of modulated beam in optical fiber, let it change around 50kHz center frequency. L14G2 optical transistor convert molulated light to radio-frequency....
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flasher with beeper in this site is very easy to build and assemble. flasher with beeper is build with very common components. various project using NE555 timer IC...
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Using LM134 and LM10 integrated circuits, we can build a thermometer which has -55 to 150?C sensing range.? The ideal meter for this circuit is a 0-200uA...
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A 1998 tracker it has 1. 6 multifuel port injection system. The vehical is hard to start. when we drive it their is a lack of power it wants to bog down. we have replaced plugs, cap, rotor check catlic ok. disconected the tps still runs the same. could this....
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This circuit is used to convert a mono audio signal into a stereo signal that can be panned between the left and right channel by a 0-10V control signal, it is intended for analog synthesizer systems...
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The Hartley Oscillator is characterised by an LC circuit in its collector. The base of the transistor is held steady and a small amount of signal is taken from a tapping on the inductor and fed to the emitter to keep the transistor in oscillation...
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555 Timer TV Remote Controlled Home Appliance Circuit Diagram. Features: 555 timer IC to avoid fast switching. you can only switch the circuit ....
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AC Motor Speed Controller was designed to control the speed of AC motors with carbon brushes anything from drills to saws to vacuum cleaner....
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The liquid level controller circuit consists of the power supply circuit and level detection control circuit, and it is shown as the chart. Power supply circuit consists of the power switch S1, power transformer T, bridge rectifiers UR1, UR2 and filter....
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The TEA1069 and TEA1069A contain all the functions needed to build a highly featured, high-performance fully electronic telephone set. The device incorporates a speech/transmission part, a dialler part and a ringer part. By offering a wide range of possible....
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My question is what part of the circuit controls the lowest rpm that can be achieved with your circuit? I`m getting a range of 1400-3700 rpm on my motor with your circuit and want to tinker it a little bit for a slightly lower rpm...
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A problem we see a lot is that people have a schematic (otherwise knows as a circuit diagram) that they want to build. But they find there are....
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I`ve now come to see cosmic ray detection as the poor man`s version of particle physics experiments. As the journey of construction, experimentation and interpretation of results, has meant learning a little bit more about the fascinating particles and....
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The resistors in the output lines are included to isolate reflections from unterminated lines. If the line characteristics are known, the resistors can be deleted. To meet NTSC gain-phase requirements, a small-value boost resistor is used. Figures 3-27B and....
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