Popular Circuits Page 252
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The circuit uses a CA3060 triple OTA (two units serve as switched current generators controlled by a third amplifier). A CA3160 BiMOS op amp serves as a voltage follower to buffer the 0.0022 µ¥ integrating capacitor. The circuit has an adjustment range of....
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This is a project of a mini USB car charger circuit. The circuit is very simple to build using only three components. Heart of the circuit is a LM78M05 IC which is a 5V positive voltage regulator IC. This IC has many built in featuers like thermal overload....
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This multi-tone siren is useful for burglar alarms, reverse horns, etc. It produces five different audio tones and is much more ear-catching than a single-tone siren. The circuit is built around popular CMOS oscillator-cum-divider IC 4060 and small audio....
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Figure 1 shows the LT®3439, one of several low noise
switchers available from Linear Technology. Ultralow
noise and low EMI are achieved by controlling both the
output switch voltage and current slew rates. This switching
architecture is particularly....
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This circuit can be used for inductive pick-up elements and dynamic microphones Most soundcards have a line` input and one for an electret (condenser) microphone. To be able to connect an inductive tape-recorder head or a dynamic microphone, an add-on....
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The unit consists of rlamplifier Q1, local oscillatorQ2, and mixer Q3. The two bands are covered without a bandswitch by using an i-f or 3.5 MHz. The oscillator range is 7.5 to 14.5 MHz. Incoming signals from 4 to 11 MHz are mixed with the oscillator to....
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Circuit shown in Figure 3-73. The line is to use the power of instantaneous power failure, the self-induced emf generated by the motor to implement now instant shutdown protect..
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Here is a 10W MOSFET audio amplifier circuit, sound that only requires a single source. Single railway material rarely used in power amplifiers class-B. However, for low power applications like this is very thin. Actually I have this circuit a old cassette....
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Bridge motor drive circuit Bridge motor drive circuit is shown, the driving stage of the circuit is 4 transistors. The control circuit is provided with four ends, through to A,..
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Amplifier circuit for electret microphones (condenser microphones). Amplifier the audio signals picked up by the electret microphone, using 741 op-amp and a 2N2222 transistor....
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A precision shown by the LM567 timer circuit MPI826 constructed and where LM567 used as a dual-band oscillator. MP1826 acts as a divider in the circuit, the output signal by di..
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a microcontroller to control a DC motor (permanent magnet DC, DC servo, stepper and DC). In this project we will use microcontroller AVR-008 from Circuits-Home. Because it can be used to control the 3 types of DC motors, the AVR-008 is often called the 3in1....
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The ISL6308A is a three-phase PWM control IC with integrated MOSFET drivers. It provides a precision voltage regulation system for multiple applications including, but not limited to, high current low voltage point-of-load converters, embedded applications....
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U7 is a 6510 microprocessor. One of the features of the 6510 is a built in parallel I/O port (P0-P5). P3 - P5 control most of the cassette interface circuitry. P3 pin p6 of U7 outputs the write data signal to connector CN3 on pins E and 5. P4 is an input....
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As shown in FIG alcohol detection alarm controller circuit. QM-NJ9 for alcohol gas sensors, if detected the odor of alcohol, the AB-QM-NJ9 between resistance becomes smaller, t..
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The article now describes how to build a charger controller board and how to program the AVR microcontroller. You should have a LiIon battery you can practice on - my practice battery is still alive and well despite considerable abuse. The more you know....
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Anyone who has to reduce the amplitudes of RF signals in a controlled manner needs an attenuator. Linearly adjustable attenuation networks using special PIN diodes are available for this, but they require quite intricate control circuitry. A simpler solution....
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I am looking to build a oscillator from a ceramic resonator. I know that a single digital inverter can be used to form a Pierce oscillator (hundreds....
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The work of the circuit this origin frequency sound circuit model astable multi vibrator. When build the circuit suits power supply the circuit will still....
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I`ve tried to make drivers for my H-bridge circuit using complimentary emmiters but the square wave outputs runat a constant 25v instead of +-10v square wave The image is a bit hard to read but it looks like your mosfets` gates and sources are wire together....
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This MK484 AM radio circuit provides a complete solution including : RF amplifier, Detection and AGC circuit (automatic gain control ), which requires only a few external components to give a high quality AM Tuner. The circuit has an input impedance of....
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The circuit does not present particular difficulties for somebody that has a small experience. The two circuits are the himself, with a small difference only in their input, when they have they measure voltage or current and in connection that concern....
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Actually did (do) have access to the resistors but yes measured open (disconnected from any ground source or input source)....
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Lamp life can be extended by improving the conditions under which its filament is operated. This includes eliminating the inrush overcurrent surge and reduclog the mechanical stress (vibration) on the filament caused by an ac source. The circuit shown....
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New cellular phones have incorporated high resolution cameras, which require high brightness illumination of the ambient area in order to achieve high quality pictures. Traditional xenon-filled photo Flash cannot be used in the very tight space available to....
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Higher bandwidth connections are made by grouping 4 or 12 pairs together, for up to 3 GB/s full-duplex connections. InfiniBand is designed to be used over a Backplane, Copper wire or Fiber. The impedance for the PWB interface or cable interface is 100W. All....
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The TS2012 is a stereo fully differential class D power Amplifier Able to drive up to 1. 35W into an 8, load at 5V per channel. It achieves outstanding efficiency compared to typical class AB Audio amps. By STMicroelectronics ..
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A way to boost the wattage of my small scale Tesla coil. I`m not getting good wattage going coming off the secondary. I`m not sure what the current or voltage is but from what i can tell is that the coils are resonant and that the output is like 100kv at....
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Using a 555 with perhaps a 4029, and I would add a 4511, then connect the pins (using resistors of course), of the bargraph leds, to "a-g" pins of the 4511. To top it all off the graphs I received are all common anode, which is a pain because I`m not too....
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Hot wire foam cutters are used by hobbyists of all stripes to contour Styrofoam into a vast array of shapes for a wide variety of uses. Model railroad builders shape foam into landscapes. RC plane builders shape foam into aircraft wings and fuselages.....
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Absolute-value integrator circuit gives effect of generating negative frequencies when input signal is negative by making counter count up for positive voltage and count down for negative voltage. Diode types are not criticaL-M. O. Paiva, "Applications of....
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This Design Idea describes an inexpensive circuit to generate two extremely high-quality, crystal-clock-reference-signals, one of which is a PWM-controlled VCXO (voltage-controlled crystal oscillator) clock signal (Figure 1)...
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The most amazing thing about this project is the small number of parts. My boss joked that it involves 17 cents worth of parts and 1000 dollars worth of programming. But don`t worry -- the code is free to you! That means you can build this TV pong game in a....
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A source code for a very simple PIC based digital timer. The actual hardware of the project isn`t with me anymore. I will rather demonstrate it using my DIY PIC16F628A breadboard module and I/O board. The complete circuit diagram along with the firmware....
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Circuit of the LED solar lantern lights presented here is built around one 6V/1W Solar Panel (PhotoVoltaic Panel) and a 4V/800mAh Lead-Acid Battery. Here,....
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A good quality FM stereo transmitter circuit schematic using ba1404 fm transmitter IC. Easy to build circuit with only few external parts....
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A simple rotating display. Just spin and enjoy. While the "Air display" is rotating, it writes the message on the air. Because the "persistence of the vision", you will be able to read the message. The operation is super simple and you don't need an user....
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When the amplifier is switched on, the speaker gets popped up by a high voltage and you can hear a loud thud sound from the speaker. This stuff is very harmful to the speaker and it drastically reduces the speaker`s life. The circuit shown here connects the....
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The CMX866 is a multi-standard modem for use in telephone based information and telemetry systems. Control of the device is via AT commands over a simple 9600b/s serial Interface compatible with most types of host Controller. An RS232 compatible Interface....
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This circuit arose from the need of the author to provide a 5 V output from the 24 V battery of a solar powered generator. Although solar power is essenti....
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This is a Sony Triniton, Model KV-20M10, manufactured July 1995. There are no blinking lights (there really are no lights to blink) or clicking sounds. The described symptom on this particular model using a BA-2 chassis would indicate an internal hardware....
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This is a very simple yet effective circuit in which the equipments connected at the so called trailing sockets will run only if the equipment connected at the control socket is switched on. For example, let`s connect a motor is connected to the control....
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A schematic diagram of a micropower single-supply instrumentation amplifier circuit is shown below. This circuit only need 15µA of current and can give over....
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Oh, one thing I forgot to mention about the battery ""circuit"" I attempted to salvage the circuit and put it inline with the new battery,....
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BPS Servo Controller -Digital is total metering and control solution for servo stabilizers for wide range of input voltage and wide range of load requirement. This reducesproduction overheads like wiring and testing and increases productionrate of the....
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Farmhand I have read those few pages and am trying to digest a little more of the book! Difficult to comprehend at times that Tesla could achieve at....
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This circuit is used to measure the current from a solar panel. It has very low power loss for currents in the 0-10A range. It also works as a general purpose DC current meter. The circuit can be used on either the positive or negative side of a DC circuit...
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12V to 3V convertor. This is an simple and cheap circuit to convert voltage from 12V to 3V.In fact this is a basic regulator circuit. The output voltage...
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The DS2422 temperature/data logger combines the core functions of a fully featured data logger in a single chip. It includes a Temperature Sensor Real-Time Clock (RTC), memory, 1-Wire Interface and serial Interface for an Analog-to-digital converter (ADC),....
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How to build and use simple PIC programmer with very easy to find and extremely low cost parts. Total cost to build programmer is less than 1.5USD....
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Using a modified equal-element design for a lumped-circuit lowpass filter has several advantages over the well-known equal-element design (Reference 1 and Reference 2). The modified design exhibits superior passband performance with only modest degradation....
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To make 12Volt 35 Amp Power Supply such as those titles can using LM7812 voltage regulator as the regulator 12 Volt DC and as a power supply can use transistor TIP2955. Series Power Supply 12Volt 35 Amp uses 6 units TIP2955 type power regulator transistors.....
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This circuit symmetrically divides an input by virtually any odd number. The circuit contains n + 1h clocks tw..
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CD4051 is a single-ended input 8-channel multiplexer, it comes with three-pass channel select inputs A, B, C, and an inhibit input INH, input terminals A, B, C signal is used t..
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Here is the circuit diagram of Two Flashing LED`s for different applications (such as model construction), and recreational. Having adjustable flashing speed with two potentiometers. It is the collection of a few active and passive components. This circuit....
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As shown for the TDA4866 test circuit. When the positive supply voltage VP, supply voltage VFB plus flyback circuit operates when the input signal changes from 1 foot and 2 fee..
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This circuit shows about 4011 IC For Protection Surge Electronic CIrcuit Diagram. Features: used to delay other appliances connected to the output ....
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First, the 4017`s aren`t initialized to a known state since the reset pins aren`t briefly forced high when the circuit powers on. The chips might usually power up in the normal reset condition, but that isn`t probably guaranteed by the IC manufacturer. This....
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The circuit is powered by a single 1.35 V mercury cell and provides a 1 V square-wave output. As shown, the crystal is a tuned circuit between transistors Ql and Q2, which are connected in the common-emitter configuration. Positive feedback provided by means....
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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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This is a simple circuit which outputs a voltage which is more than the input. This could be used to power 12v or 9v devices from a 6v system, or even 6v devices from a 1. 5v battery (see below). This circuit uses bog standard parts, without requiring a....
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In this circuit, an SCR is used to slowly vary the intensity of a 120 volt light bulb by controlling the time that the AC line voltage is applied to the lamp during each half cycle....
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The figure shows two TL3103 linear Hall-effect devices used for detecting the angle of rotation. The TL3103s are centered in the gap of a U-shaped permanent magnet. The angle that the south pole makes with the chip face of unit #1 is defined as angle 0.....
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DAC0832 is a memory device having two input engrave a D/A converter chip, can be connected directly to the computer bus. Its main properties are as follows: 8-bit resolution; s..
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LME49810 Audio Amplifier Schematic is shown in the following circuit diagram. According to the LME49810 datasheet, this is a high fidelity audio power amplifier driver designed for applications such as Audio video receivers, Guitar amplifiers, Powered studio....
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This circuit turns-off an amplifier or any other device when a low level audio signal fed to its input is absent for 15 minutes at least. Pushing P1 the device is switched-on feeding any appliance connected to SK1. Input audio signal is boosted and squared....
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Using this circuit, audio musical notes can be generated and heard up to a distance of 10 metres. The circuit can be divided into two parts: IR music transmitter and receiver. The IR music transmitter works off a 9V battery, while the IR music receiver works....
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Using a single 7812 ic voltage regulator and multiple outboard pass transistors, this power supply can deliver output load currents of up to 30 amps. this circuit is Using a single 7812 IC voltage regulator and multiple outboard pass transistors, this power....
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This simple wind Charger circuit electronic project is designed using the LTC1042 monolithic CMOS window comparator, manufactured by Linear Technology. This Wind charger circuit electronic project use the wind power to produce the energy required to charge....
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Provides at leaet 200 kc deviation when applied to base of oscillator transistor, before severe distortion sets in. feedback keeps output impedance low. -D. Enemark, Transistors Improve Telemeter Transmitter, Electronics, 32:11, p 136-137. ..
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This photocell is best mounted at tie level between the rails. The variable resistor adjusts the sensitivity of the circuit. This circuit can be powered by either 6 or 12 volts - BE SURE to use the proper relay;..
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The core of this construction is 16-Bit Stereo Digital-To-Analog Convertor with USB interface PCM2702. PCM2702 needs only few additional parts to work. The schematic is not complex. Sound card can be powered directly from USB port (jumper W1) or from....
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The circuit for the Digital Tachometer/RPM Counter tutorial consists of only a few devices. Wire them up according to the following circuit diagram. The PIC I`m using is on a demonstration board, which means the clock, power and ground pins are already wired....
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If you prefer a version that is quicker and easier to build, but which doesn`t have quite the same final appearance I highly recommend the Breadboard Six Transistor Radio Kit. It is also slightly cheaper. This is a MW AM transistor radio which can be....
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This small but useful circuit is a DC voltage convertor for using 6V devices with car battery voltage. The maximum output current is dependent if the T1 is covered with a proper heat sink or not. You can use the circuit to drive devices that they sink....
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Figure 1 shows the various LED-circuit configurations, and Figure 2 shows the timing to generate all three colors from bicolor and tricolor LEDs, although using only one LED`s operating current. Note that the driver for the bicolor LED must be able to sink....
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Shown as an infrared receiver circuit. The figure shows that the circuit is mainly composed of an infrared remote control signal switching circuit vri and signal amplification, filtering and rectifying integrated circuits TDA4 ()..
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Logic power control of analog regulator can be useful in application where a digital circuit/controller need to control power source, such as in EEPROM...
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The circuit consists of three parts. The first part has an oscillator while the second has mod 16 counter 7493. The oscillator is wired in self-triggered mode, and the potentiometer VR1 is used for speed control of the running lights. That is, frequency can....
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I wanted to use a 3. 5" jack instead of a microphone, I would need to change something else in the circuit. What would be changed in order to use an audio jack instead of a electret microphone to transmit One like this: taken from an old radio. It has 7....
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The LTC ®3525-3/LTC3525-3. 3/LTC3525-5 are high efficiency synchronous step-up DC/DC converters with output disconnect that can start up with an input as low as 1V. They offer a compact, high efficiency alternative to charge pumps in single cell or dual cell....
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Using TDA2003 audio amplifier integrated circuit can be designed a very simple 10 watts power audio amplifier on a 2 ohms load or 4 watts on a 4 ohms load. The TDA2003 device provides a high output current capability (up to 3. 5A) very low harmonic and....