New Circuits Page 171
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It seems a lot of the soundscape effect comes from turning the pots as you play. Could you make a version with slide resistors instead of pots and put them on foot pedals so you can manipulate them as you play yeah, schematic! very cool of you to offer,....
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This circuit was designed and manufactured the `80`s. From then it works without problem. It does not present any particular constructional problem, beyond known: the attention in the provided force of power supply - choice suitable heatsink and good....
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If you`ve ever wondered how electronic devices like computers can count, this article gives a simple introduction to binary and logic and shows how they are tied together with electronics to make both simple and complex computers. Please note: There are a....
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With an integrated voltage regulator connected reverse to a mini drill can be adjusted speed within certain limits so that it remain constant, independently of load. In the scheme presented below the electronic speed control is made by a voltage regulator,....
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The LTC ®6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator (VCO). The LTC6990 is part of the TimerBlox ® family of versatile silicon timing....
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To be used with PC connected to video projectors, where the lighting controller may require control of a presentation on the video screen but the PC for the presentation is located in a different location to lighting control. The Hardware required for this....
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The circuit SJT is a 1024kHz warming crystal oscillator. Circuit is shown as the chart. As its output signal level is low, so the following transistor VTl is used as the buffer amplifier. The base bias resistor R2 of VTl, the load resistor R3, the emitter....
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Those variations, (in effect an alternating signal), will be passed via the coupling capacitor to the next stage - shown by the arrow to the right. We can replace one variable resistor with another. Consider R1 to now be replaced with any one of the devices....
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Circuit Colpitts Oscillator schematics Circuit Electronics, Colpitts oscillator is very similar to the shunt-fed Hartley oscillator. The principal difference is in the tank circuit. In the Colpitts oscillator, two capacitors are used as replacement coils are....
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PIC16F778A is widely uses now and it is also famous among the beginner until all theprofessionals because of the FLASH Memory technology which can be write/erase within a tousand times of programming. Speed and code compression are the superiority of this....
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Light Sensitive Staircase Switch with Triac , Operation of the third circuit is much similar except that it has photo sensitivity. The circuit is shown in Schematic When there is no sufficient l...
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This regulated power supply can be adjusted from 3 to 25 volts and is current limited to 2 amps as shown, but may be increased to 3 amps or more by selecting a smaller current sense resistor (0.3 ohm). The 2N3055 and 2N3053 transistors should be mounted on....
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This Circuit of FM radio-controlled anti- theft alarm can be used with any vehicle having 6- to 12-volt DC supply system. The mini VHF, FM transmitter is fitted in the vehicle at night when it is parked in the car porch or car park. The receiver unit with....
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The oscilloscope is still one of the most important measurement tools of the electronic engineer. With the advent of the often very reasonably priced USB scopes, such an instrument is now within reach of every body. Twenty five years ago that was quite a....
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Trigger is applied to first of four 2-kv switch modules arranged in series, for simultaneous triggering of other modules to furnish 16-kv 20-amp pulse to type 7208 Ku-band coaxial magnetron through standard 50-ohm pulseforming network PFN. -F. A. Gateka and....
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The circuit below uses two quad voltage comparators (LM339) to illuminate a series of 8 LEDs indicating volume level. Each of the 8 comparators is biased at increasing voltages set by the voltage divider so that the lower right LED comes on first when the....
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This circuit is designed to drive the 1W LEDs that are now commonly available. Their non-linear voltage to current relationship and variation in forward v....
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An audio amplifier based on the TDA7240 IC from ST Microelectronics. The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications. This circuit of audio amplifier based IC TDA7240 can....
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Square wave generator using uA741. Circuit diagram, theory and working principle....
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Buffered video amplifier is used wherever the use of video player to the receiver / monitor TV with a long cable may cause a drop in signal amplitude and as a consequence, the deterioration in image quality. The amplifier can also be used to connect multiple....
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Digital Electronics Tutorial about the Logic NOT Gate also called an Inverter and the Logic NOT Gate Truth Table used in TTL and CMOS Logic Gate circuits....
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As its name indicates it has one stable state and it switches to unstable state for a predetermined time period T when it istriggered. The time period T is determined by the RC time constant in the circuit. Monostable mode of 555 Timer is commonly used for....
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The great thing about these little Xbee modules is they take care of almost all the heavy lifting. As you can see below both the transmitter and the receiver circuits are drop-dead simple. The main devices used in the circuit are the Xbee Modules, PIC....
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The goal is to repeat the demonstrations showing that the electrical field energy developed by a well-designed Tesla coil transmitter can be detected by a sensitive, well-tuned Tesla coil receiver placed at a distance exceeding a few wavelengths. The present....
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Already generated a voltage of 30 volts by using frequency generator and frequency to voltage converter, which stored in battery. Now I want to do inverter by taking 12v and convert it to 220v. What is the solution That`s a great idea and I`m also working on....
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The Quad Laser Head ( A2050 ) is a LWDAQ device that drives four laser diodes. The A2050 was designed by Brandeis University for general use with BCAMs. The Weizmann Institute took the A2050 schematic and created their own version of the A2050 for use with....
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Terminals 1 and 8 represent the gain control of the amplifier. These are the terminals where you can adjust the gain by placing a resistor and capacitor or just capacitor between these terminals. In this circuit, we will place a 10G‚ µF capacitor between....
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This scheme is sine wave oscillator, with frequency from 5 Hertz up to 5 KHZ. Capasitor C1, C2, C3 altogether valuable 100pF, yielded frequency 5 KHZ. To get other frequency magnitude of we ready to change value at C1, C2 and C3, like under this...
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When VOUT is very low during start-up or a short-circuit fault on the output, the switching regulator must operate at low duty cycles to maintain the power switch current within the current limit range, since the inductor current decay rate is very low....
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Unlike lead acid batteries one good thing about the Li-Ion batteries is that they can be charged at 1C rate initially. It means the charging current may be as high as the rated AH of the battery at the onset. The design presented in this article can be used....
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Kids these days seem to have most things you see in the toy shops, so if you have a son or grandson who has a collection of cars, here is something he will really appreciate. And it will be really special as you will be giving something made by you - a set....
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This coil operates from 12V or 24V SLA batteries. A pair of car ignition coils are used to provide around 20kV for charging the capacitor bank. The ignition coils are driven by a variable frequency square wave from a 555 timing chip and four large....
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This is a design circuit for digital voltmeter with LED display. It`s ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-digit LED display with a negative voltage indicator. It measures DC voltages from 0 to 199. 9V....
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TV video processor. The EGG 1134 contains a picture IF amplifier, avideo detector,a video amplifier,keyed AGC with noise immunity, delayed AGC for thetuner, an AFT amplifier, a sound IF amplifier, asound carrier detector, a4.5 MHz sound carrier amplifier and....
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The simple relay adder was built using free NOS relays sometime in 2005, but my goal was to someday build a more elaborate one that could run programs but notfill up a room like the early computers. Harry Porter built an incredible 415-relay computer which....
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This circuit measures the distance covered during a walk. Hardware is located in a small box slipped in pants` pocket and the display is conceived in the following manner: the leftmost display D2 (the most significant digit) shows 0 to 9 Km. and its dot is....
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This circuit using a dual-timer NE556 can produce 1Hz pulses spaced 5 seconds apart, either manually or automatically. IC NE556 comprises two independent....
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This novel buzzer circuit uses a relay in series with a small audio transformer and speaker. When the switch is pressed, the relay will operate via the transformer primary and closed relay contact. As soon as the relay operates the normally closed contact....
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220V (5Hz) alternating voltagepass Z1 circuit filter filtering, then it will send to the connect point of AC over voltage, under voltage protect relay K2. When normal working, K2 connect point should up-close, connect AC 220V voltage to AC current-limiting....
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The Uno has just sufficient memory and ports. You have to program this one efficient in case you want to store settings in memory etc. Buying the Mega gives you more memory and ports. The Shako valve uses 24 volts DC. I would prefer to use 12 volts because....
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A bit of a newbie to creating circuits I have a 12V battery regulated to 2mA with an LM334Z current regulator. Here are the docs for the current regulator: ....
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Basic Regen design is pretty common, so BEFORE the schematic comes the "concept stage", the "what`s available in the junkbox stage", back to the "concept stage", followed by the "mechanical/electrical layout stage", then sketch a rough schematic. and do it....
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This simple water detector circuit uses alternative voltage in order to prevent the corrosion of the electrodes. It is easy to build and uses N1 as a trigger Schmitt gate which generate the AC. If between the electrodes is a electricity conductor, for....
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This is a 1 watt fm amplifier with a good design that can be used to amplify a rf signal in the 88 108 MHz band. It is very sensitive if you use good rf power amplifier transistors, trimmers and coils. It has a power amplification factor of 9 to 12 dB (9 to....
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A charge amplifier is an amplifier whose equivalent input impedance is a capacitive reactance that is very high at low frequencies. Thus contrary to what its name may suggest, a charge amplifier does not amplify the electric charge present at its input. Its....
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A motorcycle or boat battery that is not needed over the winter is usually charged before being put away for the winter, after which it remains standing unused for months on end. As a result, it accumulates deposits of lead sludge, which can result in....
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A very simple and efficiency Lithium battery charger and monitoring system, can be designed using the LTM8061 integrated circuit, designed by Linear Technology. The LTM8061 IC is a high efficiency 32V, 2A Module standalone Lithium battery charger optimized....
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The circuit is placed parallel with the exit of power amplifier and us gives the level of signal ,from output. Changing resistance R1, in the input circuit, we adapt the indication of power, in the resistance of loudspeaker, that we use....
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The crossover network is intended for use when an existing audio installation is to be extended by the addition of a subwoofer. Often, this additional loudspeaker is one that has been lying around for some time. If its frequency response extends down far....
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This project involves constructing an energy efficient broad spectrum LED lamp system. The lamp is useful for indoor reflective room lighting. It has a broad color spectrum that more closely approximates the light of the sun when compared to fluorescent....
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An electromagnetic field probe designed to detect changing electric and magnetic fields. The probe has switchable gain, a frequency response up to 400kHz and independent audio and meter monitoring. This EMF probe uses an inductor to locate stray....
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The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit for stereo applications in car radio, TV and audio systems. An additional control input allows loudness compensation to be simply effected. Four control inputs provide control of....
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The schematic diagram come from circuit: The Voltage Regulator With a Field Effect Transistor power supply. Go to that page to read the explanation about above power supply related circuit diagram. Feature of this transistor compensation voltage (see....
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The idea was to show time passing, but instead of a traditional clock face or digits or lights representing binary, to use some kind of tactile feedback. A simple vibrate motor was an obvious choice - used as `force feedback` actuators in video-game console....
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One of those smart cards that are often used for illegal viewing of encrypted video signals. It contains an Atmel AT90S8515A processor and an 8k EEPROM memory AT24C64, which gives the card adequate processing power for numerous other purposes. Other card....
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One of the drawbacks of a three-pin voltage regulator is that the input voltage needs to be 2. 5 3 V higher than the output voltage. This makes these integrated regulators unsuitable for battery power supplies. If, for instance, the output voltage is 5 V, a....
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The charger can charge a single cell or a number of series-connected cells up to a maximum of 18V. Power transistors Q1 and Q2 are connected as series regulators to control the battery charger`s output voltage and charge-current rate. An LM-317 adjustable....
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My site contains a few low power transmitters of one type or another, but until now no receiver. This circuit can be used to "sweep" an area or room and will indicate if a surveillance device is operative. The problem in making a suitable detector is to get....
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Used buba oscillator and it didn`t oscillate in the begining. first thing you should check the basics. a little error in cap, res and inductor values makes a huge difference. try calculating the component values with multimeter and i bet cap value wont be....
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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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This type of cable is a bit more complicated than the unbuffered one, although it is also fairly easy to construct. The cable most often used in this category is the so-called Wiggler cable. The Wiggler is a commercial cable sold by Macraigor Systems. With a....
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Using MAX1496 an ADC with LED drivers, you can make your own 3 1/2 digit voltmeter with just a handful of components. It even has external/internal Vref, HOLD and PEAK as well as 200mV, 2V rangs....
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Wireless Telephone Bug. Here`s a neat little project that will allow you to monitor your phone line as soon as your phone is off hook. You can use a regular FM broadcast band radio...
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Using the ISL9440 quad-output synchronous buck controller IC can be designed a very simple high efficiency electronic circuit power supply, that will provide 4 different fixed output voltages. ISL9440 synchronous buck controller circuit integrate 3 PWM....
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The half linear design is simply so you can get away with small thermal considerations, if the linear only needs to handle 1-5w in place of the full 75w per rail. as for the MOSFET to regulate with them means operating them in there linear region, just below....
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The speed of light has been measured many different ways using many ingenious methods. The following note describes a method which is conceptually very easy to understand and fairly easy to implement. The technique is the simple time-of-flight optical pulse....
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PIC RTC: A Real Time Clock IC using the DS1307 and a PIC micro. This PIC project uses an I2C Real Time Clock chip and display to create a four digit standard desk clock....
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The TDA7294 amplifier module is a monolithic integrated circuit. It is intended for use as an audio class AB amplifier in hi-fi applications. It has a wide voltage range and output current capability, enabling it to supply the highest power into both 4 ohm....
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I love the Arduino as a simple and accessible controller platform for many varied projects. A few months ago, a purchased an Ethernet shield for my Arduino controller to work on some projects with a mate of mine it was a massive hit for the first time, I....
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Digital visitor counter is a reliable circuit that takes over the task of counting Number of Persons/ Visitors in the Room very Accurately. When somebody enters into the Room then the Counter is Incremented by one and when any one leaves the room then the....
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A switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another. A switch may be directly manipulated by a human as a control signal to a system, or to control power flow in a....
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Can a 555 negative supply circuit, like the one below I pulled from another schematic, supply enough negative voltage to a LM324 and a AD736JN? I`m....