Popular Circuits Page 225
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Though stepdown converters - buck converters - are extremely popular, the rules of thumb and calculations that speed their design can be hard to find....
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The gEDA project has produced and continues working on a full GPL`d suite of Electronic Design Automation tools. These tools are used for electrical circuit design, schematic capture, simulation, prototyping, and production. Currently, the gEDA project....
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A VU Meter is used to display the power level of the audio, it also is beautiful. When you go to the electronic equipment store to buy the VU meter kit, with the assembly various parts on their own or the style ready to use. Most of us are using the....
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Electric fence control circuit is composed of the power supply circuit, pulse generator and high-voltage circuit, and it is shown in Figure 4-27. Power supply circuit is composed of the power transformer Tl, rectifier diodes VDl, VD2, filter capacitors Cl,....
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Creating a modular, networked, home control system was greatly simplified by using common 4-wire phone cable with stake-on connectors. The cable feeds both power and network signals to the various modules. Each module is made on a single sided circuit board....
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CS9482 integrated circuit fabrication with holiday lights circuit shown in Figure 2-37. Since the CS9482 chip already has 4.1V voltage regulator circuit, the external circuit m..
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This is a very versatile voice modulator circuit using IC HT8950A from Holtek Semiconductors. The IC is capable of creating 7 upward or downward steps on the frequency of the input voice at a rate of 8Hz. There is also two special variation effects namely....
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This small circuit is ideal for checking the basic operation of an infrared remote control unit. The circuit is based on the brilliantly simple idea of connecting a piezo buzzer directly to an IR receiver IC. This method is almost as simple as connecting a....
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Car Inverter indicators: Input voltage: DC 10V ~ 14.5V; Output Voltage: AC 200V ~ 220V 10%; Output frequency: 50Hz 5%; Output power: 70W ~ 150W; conversion efficiency: more tha..
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This simple LED torch is driven by a 2-transistor blocking oscillator which steps up the voltage from a 1. 5V cell. It relies on the inherent current limiting of the 150 µH choke to protect the white LED from over-drive. With a 9V zener diode in place of the....
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Control RGB LED strips via a USB or ethernet interface. These strips consume a lot of power and the mass produced controllers suck. I would also like independently controllable "zones" if you will, so ideally this device could power 1 or more strips. Since a....
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The circuit consists of two sections, one being a DC/DC
converter and the other being a pair of dual N-channel
MOSFETs and their associated high-side drivers that effectively
form a DPDT switch...
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BA6104 Five-digit LED level meter level LED display driver IC circuit constituted as shown in FIG. BA6104 10 by two-dot LED level display circuit configuration shown in Figure ..
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The loop can be any type of hookup wire, with a maximum resistance of about 90K. Using very thin wire (40AWG, for example) will make a very sensitive trip wire, but will shorten the distance it can be strung due to the high resistance...
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Before three weeks i am introduced inverter circuit diagram but the circuit not included ac to inverter switching part so today i introducing a 230 Volt Ac to inverer switching circuit diagram. Circuit showing a inverter switching. Here i have used bc 558,....
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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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This is DoorBell Bird Voice Electro Suite, to replace the old doorbell, to give the freshness in using the excitement new doorbell....
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Here`s a design of a phone bug circuit. This wireless telephone line spy circuit can be used to transmit the phone conversation to a nearby FM radio. This circuit must connected to a normal phone line. This is the figure of the circuit; The first transistor....
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The circuit given below is of a telephone operated DTMF remote. The circuit can be used to switch up to 9 devices using the keys 0 to 9 of the telephone. Digit 0 is used to switch the telephone system between remote switching mode and normal conversation....
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Using the LM628 LM629 dedicated motion-control processors can be designed a variety of DC and brushless DC servo motors, and other servomechanisms applications. The power path of this electronic project, motor driver is based on the LM12 high power....
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This ultrasonic dog repeller circuit will chase away angry dogs. It is build with the all known 555 circuit, a buzzer and a little ferrite transformator. T....
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Basic Oscillator (Tone Generator) At 1.8 KHz, IC 555 , Here we have an astable oscillator built around 555, which gives an alarm tone of 1.8 KHz directly driving a speaker. This is basic alarm circuit, whic....
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Tl is tuned to converter-output frequency Ul to provide 45-to-50-dB gain, depending on the design of Tl and T2. C2, C..
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The input transformer is likely to be the most expensive part of the entire project. As an alternative, a couple of 12 Volt car batteries could be used. The input voltage to the regulator must be at least several volts higher than the output voltage (12V) so....
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No description available...
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Circuit Kunci Digital Ber-password is the circuit diagram of a simple electronic combination lock usingLS 7220. Circuit Kunci Digital Ber-password Password Digital can be used to activate a relay for controlling (on & off) any device when a preset....
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This circuit uses two comparator that are combined in what is called a window comparator, i. e. resistors R2, R5, and R10 determine a voltage window within which the voltage applied to the junction of D2 and D6 must lie in order for the outputs of IC2. A and....
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For simple electronic circuits, it may be sufficient to get a qualitative insight on dedicated electrical signals. This interface circuitry allows to use the line-in input of a standard PC soundcard to be used as a 2-channel oscilloscope. This setup does not....
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This Circuit uses the ZNA234E IC which makes available all the waveforms necessary to produce the crosshatch, dot and greyscale test patterns on a television screen. The composite video output can be injected directly into the video input of a receiver or....
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Ducati Haynes Pdf Manual PDF Download...
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Because you are powering the MCU via USB, this common zero voltage should be the same as the supply and therefore connected to the 0V (UVSS) line...
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This Simple Metal Detector Circuit Diagram Design is based on superheterodyning principle which is commonly used in superhet receivers. The circuit utilizes two RF In the circuits diagram, IC1- io the 555 Ic, whose frequercy is determined by f1= 0. 7R/L1....
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The CXA1821M is an IC developed for compact disc players. This IC incorporates an APC circuit and RF, focus error, and tracking error Amplifiers for 3- spot optical pickup output. (The voltage-converted optical pickup output is supported. ) By Sony....
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Battery discharge will cause plate acidification, affecting the normal life of the battery. To solve this problem, we designed a special micro-power battery over-discharge prot..
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Using the versatile L200 voltage regulator, this power supply has independent voltage and current limits. The mains transformer has a 12volt, 2 amp rated secondary, the primary winding should equal the electricity supply in your country, which is 240V here....
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The IBM PC debugger plugs into the PC"s math-coprocessor socket.The 8288 bus controller, IC1, regenerates control signals from the processor"s status signals, SO, Sl, and S2. Reset LED Dllights if reset is active and holding the processor. Clock status LED....
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This broadband frequency-upconversion mixer, which has been simulated with and without a novel linearity-enhancement circuit, is suitable for multiple-standard wireless applications from 1. 0 to 10. 6 GHz. Wireless communications products continue to support....
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This project flashes eight LEDs in an apparently random manner. It uses a 4060 combined counter and display driver IC which is designed for driving 7-segment LED displays. The sequence is not really random because seven of the LEDs would normally be the....
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1. Spectrum-analyzer project 2007 update Since the development of the wide-band VCO almost 10 years ago, the whole spectrum-analyzer project with all relat....
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hi, Dears . I want to use AD574 ( The ADC574A is a 12-BIT successive approximation analog-to-digital converter .) i want to know , How work this IC ?? ....
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Oscilloscope measurements of ground noise can be unreliable because noise can enter your circuit via the scope"s three-pronged power plug. You can avoid this problem by using the ground-noise tester shown. Powered by two 9-V batteries, the circuit....
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This indicator is basically a switch with hysteresis characteristics. If the input voltage momentarily (or permanently) exceeds the most positive reference level, LEDl is switched on. If, on the other hand, the voltage falls below the negative, or least....
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The following circuit shows about Honda CB750 Electrical Circuit Diagram. Features: turn signal relay, oil pressure switch, neutral switch, ....
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It is a wireless doorbell with a cost of about $10. 00. So, we have to change our attitude to building projects and use items such as this to learn how things work and modify them to suit our own requirements. This doorbell uses quality components. It`s not....
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SECAM system uses time multiplexing of two chrominance signals, transmitted sequentially, with one-line memory in receiver circuit. -R. Chaste, P. Cassagne, and M. Colas, Sequential Receivers for French Color Tv System, Electronics, 33:19, p 57-60. ..
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Automotive diagram for Instrument Cluster of 1987-1993 Ford Mustang (Third Generation)...
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After some new experiments on sound analysis, I used a different design for the microphone amplifying section, that I am happy to share with you (From the statistics of Arduinoos, I know that sound capture is a topic of major interest for many of you). The....
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his chapter shows how to connect an analogue signal to a PIC. An analogue signal is similar to a sine wave and is generally less than 5v (5,000mV) in amplitude. Low-level signals are generally expressed in mV, to make them instantly recognisable and easy to....
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In the circuit, N1, N2 constitute the RS flip-flop, and the trigger end is pin 8 and 13; N3, N4 form the controlled oscillator, only when N3`s pin 1 is high, the oscillator works. When the finger touching pad TP1 is bridging, N1 output`s pin turns to high....
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If you`re expecting an important visitor but you just have to step out for a moment, an electronic doorbell memory can come in handy so you can see whether someone rang while you were out. Of course, you can`t tell whether it was the visitor you were....
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51 microcontroller has a full-duplex serial communication port, so you can easily serial communication between the microcontroller and the computer. When the serial communicati..
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The simple battery charger circuit design shown here uses the versatile IC 555 as the main component. The circuit can be used for charging all types of rechargeable batteries within the specified limits as given in the article...
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Figure 1 shows the circuit. A major change from all of the designs from that era is the speaker coupling capacitor - 1000uF (for a -3dB of 20Hz and a 8 Ohm load) was the most common value. This is too small, and the 2200uF shown is actually marginal. 4700uF....
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The pulser is intended to switch the mains voltage on and off at intervals between just under a second and up to 10 minutes. This is useful, for instance, when a mains-operated equipment is to be tested for long periods, or for periodic switching of....
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This is the fire alarm circuit which use LDR to sense the smoke from the fire, so it can be used to detect any dark smoke. With the onset of summer season, possibilities of fire accidents go up. These fire accidents could be prevented if ti....
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We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon. ..
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A parametric equalizer on an audio-mixer-sized PCB...
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The main part of this circuit is the LM386 amplifier chip. It also uses a transistor input to buffer the input signal and provide extra gain for the LM386. The little unit has helped me out on numerous occasions when trouble shooting any amplifier circuit....
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The Wien-bridge oscillator is a unique circuit because it generates an oscillatory output signal without having a sinusoidal input source. Instead, it uses capacitors with initial voltages to create the output. This circuit can be especially useful if....
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A Selective Amplifier 10dB for FM/VHF region. Note that some devices to be used SMD components and may have a minimum sales volume. Device works very well as an FM external amplifier "when used for example in car / boat etc . Thanks to GF3 filter, amplifier....
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This is a low power voltmeter circuit that can be used with alternative energy systems that run on 12 and 24 volt batteries. The voltmeter is an expanded scale type that indicates small voltage steps over the 10 to 16 volt range for 12 volt batteries and....
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The diagrams below detail the development of a simple modular radio receiver based entirely on circuits and devices studied during the Part IA course on Linear Circuits and Devices. This receiver may not take the market by storm! However, we hope it will....
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When we modulate a carrier signal with amplitude modulation, there will be four frequency components as the result. The first is the modulating signal itself, the second is the frequency carrier, the the latest two are the difference and the sum of the....
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AC contactor has a silent operation of the circuit due to energy-saving effect is remarkable, no noise, low operating temperature, extend life, etc., workers and peasants in th..
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Standard serial interfacing of microcontroller (TTL) with PC or any RS232C Standard device, requires TTL to RS232 Level converter. A MAX232 is used for this purpose. It provides 2-channel RS232C port and requires external 10uF capacitors...
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Can i use the following circuit or is there any special IR decoder IC and schematics available If the decoder supports any remote is good and well, is it possible But i want to control variable resistor via IR without relays(Means not any different fixed....
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No description available...
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This is a 2-station simple intercom circuit build based on transistors part and using common 8R mini speakers. The speaker works as microphone and generate sound, so there is no need microphone for this intercom. The "press-to-talk" switches should have a....
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Bass Treble Tone Control Circuit A preamplifier circuit providing independent Bass and Treble tone controls is shown in this circuit. The....
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This circuit, which was developed to monitor the traffic of bumblebees in and out of the hive, differentiates a-to-b motion from b-to-b motion. When used with an optical decoder, the circuit distinguishes clockwise from counterclockwise rotation and....
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A relatively simple circuit Lu Qing, stair walkway light control delay light switch, the disadvantage voice a little less sensitive, and sometimes difficult general conversatio..
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The simple circuit for converting an audio signal. The circuit basically consists of a buffer/amplifier stage and three filter circuits: a ....
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A simple test circuit to fault find audio and radio equipment. Can be used to inject a square wave signal, rich in harmonics, or used with headphones as an audio tracer. A single pole double throw sitch is used to switch between inject and trace modes. The....
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The Lifetime Drive, later renamed the Universal Drive after issues regarding implied warranties, was produced by Miles Gordon Technology (MGT) in April 1989 as a floppy drive capable of connecting to most popular machines at the time. MGT was run by Alan....
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This circuit provides either latched switching or timed switching. U1A and U1B provide audio ampliftcation from the microphone, U2 is a retriggerable monostable multivibrator. S1A and S1B select either U3, a flip flop, or U2. R13 and R14 allow a 6 to....
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This circuit is intended for alerting purposes after a certain time is elapsed. It is suitable for table games requiring a fixed time to answer a question, or to move a piece etc. In this view it is a modern substitute for the old sandglass. Useful also for....
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The following circuits is one of the power amplifier circuit for FM transmitter with an output power of 30 watts. Power amplifier circuits for 30-watt FM transmitter, the transmitter uses power transistor type 2SC1946A. Power FM transmitter circuits uses a....
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The following circuit shows about TL163 IC For Ultrasonic Remote Control Circuit Diagram. Features:detector, high-gain amplifier, low-frequency ....
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