New Circuits Page 107
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Chris has a great article about a do-it-yourself radar system build with PIC18F452. It s a great hobby project although the schematic....
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A circuit for car windshield/wiper motor speed control built using NE 555 IC.This enables intermittent windshield wiper control which changes sweep rate to 10 seconds....
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Here you can find plans for a simple ground plane antenna that works well in the FM Band (88-108MHz). It`s built of a small plastic disk 6 x 6 Loop Antenna - This new loop antenna by Graham Maynard is his best design yet and I am proud to be the first to....
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Any diagnosis of the power top system should begin with the use of a scan tool and the proper Diagnostic Procedures Information. The scan tool can provide confirmation that the Programmable Communications Interface (PCI) data bus is functional, that all of....
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The following circuit shows about Mini Audio Amplifier Circuit Schematic Diagram. Features: power less than 3mA, small output, using push-pull ....
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As mentioned earlier, Arduino consists of two major parts: the hardware (the Arduino board) and the Software (the IDE). The advantage of using the Arduino is that we can build a circuit and then modify how it responds by changing the code (instead of....
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Here are two simple 12V DC motor speed controllers that can be built for just a few dollars. They exploit the fact that the rotational speed of a DC motor is directly proportional to the mean value of its supply voltage. The first circuit shows how variable....
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This is a false capture circuit or Lie detector circuit. The basic principle of the resistance of human skin. While dry skin is a resistance of about 1 Mega ohm....
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use microcontrollers to communicate in serial between the microcontroller (AVR-006 kit) with a computer. In this project we will use microcontroller AVR-006 from Circuits-Home. Before creating the program, the first job we have to do is understand about the....
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the left side works fine and i`ve got the left side running lights and brake light to work but not the turn signal I am wiring it right into the harness` and do not want to have to buy the plug in harnes as i need it done asap Ask-a-doc Web sites: If you`ve....
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FM transmitter circuit very stable and simple given here. With an adaptive antenna, the transmitter can reach a range of about 200 meters. Transmitter met this year and got a few good results. Let`s see how the circuit. A condenser microphone (K1) is used to....
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This ambit is of an 2x 2, 500W RMS stereo amplifier, super-light and after switching-mode ability supply. The ambit aloof shows a channel, and the ability accumulation that it assists to the two channels. The audio ambit should be duplicated, but the ability....
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A rf field indicator is required to verify power stages and transmitters antennas. With this radio field indicator you can measure radiated energy from ant....
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The meter came from eBay, and has a 1 mA full scale movement. It was already marked 0 to 100. I simply removed the original scale, scanned it, and added the "% NETWORK" markings over some of the original ones with an image editor. I then printed the new....
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The CAMD CM8870 CM8870C provides full DTMF receiver capability by integrating both the band-split Filter and digital decoder functions into a single 18-pin DIP, SOIC, or 20-pin PLCC package. The CM8870 70C is manufac- tured using state-of-the-art CMOS....
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Port 1 of the controller (AT89C4051) is used as the data lines for the LCD (starting from pin 7- pin14 of LCD). here i am using a 16 x 2 lines LCD display. In the first line, I`ll display "DAY" and "DATE", in the second line, i am displaying "TIME" with....
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This project makes a PIC microcontroller play audio PCM sounds using PWM modulation! Pulse-code modulation (PCM) is a digital representation of....
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I have a 05 wildfire 250 qac i think thats wat it is. mine wont start either. When i try to start it it sounds like the gears from the starter to the other gears are just spinning. I got mad and flippied it the one day and ever since theen its been like....
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If the audio output is connected to equipment that has a balanced input circuit with a separate ground connection, the ground connects to OUTPUT terminal # 1. The PZ-2LA can also be powered by an external AC or DC source between 8 and 24 volts. Connect it to....
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The design includes a buffered virtual ground circuit provided by an LM741, LM318 or similar Op Amp, which sets a fixed voltage half way between the input voltage and ground. This is then used as the virtual ground for the sine and triangle wave outputs from....
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Ok, its been a while since I did much more than think about my micromouse, but over the last week or so I actually did some work` on the sensor design First off this is all theoretical, I need some bits an pieces before I can test this outside of simulation.....
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A Transcutaneous Electrical Nerve Stimulation (TENS) device is, put bluntly, a machine for giving electric shocks. The author was prescribed such a device....
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am freeborn Emmanuel, am into inverter, battery charger and automatic change over for generator and stabilizer designing. i do design locally made inverter for house and office use and i do install solar panel with inverter, i do design solar charge....
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In this circuit 4017 CMOS decade counter can be used to build a timer circuit. Push-button S1 will discharge capacitor C1 through resistor R2 ....
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A substation capable of consuming 100MVA with375KVA, 60Hz in input and 132KV and 50hz using same power. so my problem is how to change the 60hz to 50hz, including wiring diagram..
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If you are looking a ICs for a DC to DC converter job. I highly recommend of IC-LM1577/LM2577 supply all of the power and control functions for step-up....
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Diode D1 and resistor R1 provide the VDD isolation when programming the 24 pin devices. The jumper J3 must be shorted for 24 pin devices, and open circuit for 28 pin device programming. Following EEPROMs are pin compatible with their EPROMs version, We are....
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Signals with a know frequency but unknown phase may be detected using an in-phase and a 90 ° shifted reference signal, as frequently used in lock-in amplifiers, synchronous detectors, and frequency-response analyzers. The 90 °-shifted signal is called the....
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line follower robot which is going to follow the line on the track. in general line follower robot is controlled by a microcontroller...
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Crystal radios have been around for over 100 years and exist in many different shapes, sizes and complexities. Some are definitely better than others, but wired correctly and connected to a good Antenna and Ground wire system, this simple little AM radio....
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10 Watt Audio Amplifier circuit diagram. This is general purpose 10-W power audio amplifier circuit for medium power amplifier or use a modulation in the AM transmitter. For higher power up to 30 W can be obtained by increasing the voltage and change the....
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Pressing a single key on the keypad - will energize the relay. Entering a four-digit code of your choice - will de-energize the relay. The circuit was designed to control the Modular Burglar Alarm System - but it will have other applications. If you require....
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This temperature switch uses a few discrete components to trigger a buzzer when the temperature of the surrounding increases. Suitable for use as a simple fire alarm indicator ..
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There are three switches that represent "binary number", and according to that switches` combination, number of lit LEDs change to represent that binary number. I am wondering how do provide equal current and voltage for LEDs and make them light up with....
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For power supply is needed transformer with two individual secondary 12V windings. If you want to supply from transformer S/PDIF decoder and transformer doesn`t have third separated winding, we must connect supply input of decoder parallel to winding for....
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The older PC that concerned did have a standby state, but no matching BIOS set-ting that allows it to start up unattended. Although a +5 V standby supply voltage is available, you always have to push a but-ton for a short time to start the computer up again.....
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This 555timer clap switch circuit electronic project is designed using some common electronic parts. This 555 timer clap switch circuit electronic project operates from a distance of up to 10 meters from the microphone. Signal from microphone is amplified by....
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Designing the circuit for the DC motor and bluetooth system. The bluetooth remote control is used to open and close the curtain. Below is the block diagram for your reference. 2. You can make use of your mobile phone, write a J2ME application for....
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The circuit shown in this paper uses 12 components to form a miniature wireless FM microphone with stable operating frequency, and its transmitting distance is about 30 meters and more than 100 meters at 6V power supply.The circuit is shown as Figure, BG1,....
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This project gives you a simple temperature controlled fan. If the difference between real temperature and the user temperature is high then the fan will run at...
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The IR photo transistor Q1 (Radio Shack 276-145A) or similar is connected to the set input (pin 6). The photo transistor should be shielded from direct light so that the voltage at the set input (pin 6) is less than 1 volt under ambient conditions and moves....
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The winding machine electronic counter described in the example uses LED digital display to show the wound coil turns, the use of maximum count rate is 9900 turns. The working principle The winding machine circuit is composed of the power circuit, infrared....
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This circuit provides a visual 9 second delay using a 7 segment digital readout LED. When the switch is closed, the CD4010 up/down counter is preset to 9 and the 555 timer is disabled with the output held high....
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In Circuit Transistor Tester Schematic Here is a circuit that can indicate the condition of a transistor by using two LEDs. A good NPN transistor...
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So the concept here is pretty simple. I wanted to mount a microphone on a stick with an LED and design a circuit that would react to a large amount of noise on the microphone input (blowing) to turn off the LED. As you might expect, the schematic for this....
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Multivibrators, like the familiar sinusoidal oscillators, are circuits with regenerative feedback, with the difference that they produce pulsed output. There are three basic types of multivibrator, namely the Bistable Multivibrator, the Monostable....
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The doorbell operates on the 303MHz band and the 30 metre range (100ft) is obtained without the use of an antenna! The circuit is actually radiating from the printed track of the tank circuit. The Tank Circuit is a single-turn coil and a small capacitor (5p....
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Switch-mode power supplies are used in electronic circuits to increase (step up) or reduce (step down) voltage levels in the most efficient manner possible. Compared to linear voltage regulators, switch-mode supplies convert relatively little energy into....
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The Encoder and Decoder are different kind ofcombinationalcircuits which are used to convert binary information to decimal, octal and hexa decimal andvice-versa. A decoder iscombinationalcircuitwhich is used for to convert n it binary information to 2n....
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When the receiver is tuned to a M. W. radio station the resulting feedback howl, caused by the transmitter can be set to alter, or appear when the coil and radio are above or near a metal object Here is a pictured of the search head. It is made from a....
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The fundamentals of crystals has not changed since this article appeared in a 1960 edition of Popular Electronics. The way they are grown, cut, and packaged has changed fairly significantly. An understanding of how they work at the atomic level has advanced....
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The State Jal Boards supply water for limited duration in a day. Time of water supply is decided by the management and the public does not know the same ..
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The following is Chapter 4, part five of a five part series ""Some thoughts on DC/DC converters"" by the late Jim Williams and Brian Huffman from Linear Technology`s Volume II book entitled, ""Analog Circuit Design-- Immersion in the Black Art of analog....
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I have created a light computer that generates an effect like the scanner of the car KITT in the TV series Knight Rider. You can see a visualization of the effect in the image below: Many circuits on the Internet are built with a CD4017 counter IC. I myself....
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Transformers made for powering large neon signs are inexpensive and very reliable. Most commonly, the secondary is center-tapped, which prevents the use of its full peak-to-peak output in applications where one of the terminals needs to be grounded. In the....
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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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You may admit abounding of the date circuits - as they are agnate to those acclimated in some of my added projects. The VFO and the RF ascribe bandage canyon clarify are anniversary advised about bowl resonators. These are acceptable difficult to locate.....
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OK, after having some fun with stereo version of the VU meter I described in my previous blog-post, now it`s time to do a serious stuff. Studio grade VU meter ! 24 steps, equallyspaced every 3 dB, covering Extra wide Dynamic Range from -63 up to +6 dB.....
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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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The goal is to take photos of some fairly quick process (well, at least too quick for the human eye) at exactly specified times with sub-millisecond accuracy. Of couse, with expensive special equipment at hand (such as a high speed camera), this is a trivial....
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First step is always to look around on the internet. After some searching, I found out that the QAA75-sensor is actually made by Siemens. This broadened my search a bit. Turns out that Siemens refers to the communication as a “Boiler System Bus (BSB)”. This....
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After restoring my Fisher 400, I could not let my smart head and creative hands rest. So I have started to look for another tube gear to apply my newly acquired skills. There was plenty of stuff around, but importing from USA to European Union is quite....
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Overview: The MAX34446 data logger for power supplies can monitor voltages for overvoltage and undervoltage, as well as for overcurrent conditions and overtemperature conditions. The device constantly checks for userprogrammable thresholds; when th....
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The PZP-1 Piezo Buffer is now available! The PZP-1 is a high impedance buffer preamp, using 100% discrete class-A circuitry. Designed expressly for the Fender Precision acoustic/electric and HMT basses, it can also help other instruments with piezoelectric....
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The difference between instantaneous frequency and central frequency of the carrier will be directly proportional to the instantaneous value of the amplitude of message signal. 555 Timer wired in Astable Mode can be used for generating Frequency Modulated....
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The wiring schematic played a big roll on the robot. This diagram is used to graphically display all the wiring of the motor controlling micro-components that gave the robot the ability to physically move forward, backward, left, right, and stop. (This....
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A simple FM transmitter links your home-entertainment arrangement to a carriageable radio that can be agitated about the abode and into the aback yard. For example, you can comedy music on the CD banker in your active room, and acquire to it on a....
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An article describing how I made a firework ignition system out of a few things I picked up at Walmart and Radio Shack....
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This is an improved IR remote control extender circuit. It has high noise immunity, is resistant to ambient and reflected light and has an increased range from...
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This microphone preamplifier electronic project is based on transistors and is capable of about 70dB or more gain at audio frequencies. Gain of this circuit is approximately equal to the product of the hfe of the both transistors times in the ratio of the....
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Reference design for an automotive antenna features an AM/FM low-noise amplifier (LNA) for active antenna modules. Article details the capabilities, features, and ease of design with an AM/FM active antenna LNA....
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This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automatically when you turn-off the ignition. By adding external relays you can....
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This circuit is designed to operate an electrical door-release mechanism - but it will have other applications. Enter the four-digit code of your choice - and the relay will energize for the period of time set by C4 & R4. Use the relay contacts to power the....
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The encoder strip should be laser-printed on sticky label material (ink-jet might work, I haven`t tried it). It is then cut out and wrapped around the barrel of the second drive gear. I used bright white sticky address labels Avery "WeatherProof White....
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If you are a hobbyist or a professional electronic engineer who make many electronic experiment, troubleshooting, or testing, providing wide range variable...
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Here is the 22 watt stereo audio power amplifier circuit diagram based on TDA1554 and integrated circuit from NXP semiconductors (formerly PHILIPS semiconductors). It is very simple and useful circuit for amplify the stereo signals. The circuit dissipates....
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When S1 is pressed, counter U2 is driven by oscillator U1A/U1B and the count (0 through 6) is read on DISP1. R1 and C1 determine the count rate, which should be fast enough to ensure a "random" count. ..
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A Left and Right source of audio are first pre-emphasized (HPF) and then fed to adder circuits. The output of one adder is the sum of the two signals, or the L + R signal (the monaural signal), and the output of the other adder is the difference of the two....
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The drive circuit is the basic drive, recently made a case, is the need 27mm passive piezoelectric buzzer sound over 100dB, and power consumption to as low as possible, due to product cost and structural size limitations, only with S8050, and N-channel....
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Distributed power systems are prevalent in telecommunications, networking, and high-end server applications and utilize a 48 V bus voltage adopted from the telecom industry. From the 48 V bus, a number of isolated point of load (POL) converters power the end....
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Volvo S40 Wiring Diagram Radio 1997 Manual PDF Download...
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need often arises for a sensitive sound pick-up device, whether it is to be used as a simple microphone or a more exotic device as a sound operated alarm, a bugging device or a sound operated flash (for stop action photography) the list is quite unending.....
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This is a very simple cable TV amplifier using two transistors. This amplifier circuit is most suitable for cable TV systems using 75 Ohm coaxial cables and works fine up to 150MHz. Transistor T1 performs the job of amplification. Up to 20dB gain can be....