Popular Circuits Page 16
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SI2171 is a sub package of SI2170, If you need see the description, please click SI2170. If you need SI2171`s datasheet, please download it from below. By Silicon Laboratories ..
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Receiver interference is hardly an unknown problem among model builders. Preventive measures in the form of ferrite beads fitted to servo cables are often seen in relatively large models and/or electrically driven models, to prevent the cables from acting as....
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This circuit shows a color sensor circuit diagram. The circuit is based on the fundamentals of optics and digital electronics. This circuit will ....
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The tester consists of an dual time base circuit 556 and a number of RC components and other components. Illustrated by the right half of the..
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Here`s are some circuit diagrams for driving relays from a microcontroller. Make sure you`re using a 5-volt relay (this refers to the coil, not the load circuit), and make sure that the relay has a high enough rating for the load that you`re driving. This....
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his month I am making 3 different types of siren circuits based on the 555 timer. The first circuit simulates the siren of a British police car. It uses two 555 timers in the circuit. The 555 on the right is wired as an alarm tone generator and the second....
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This is a schematic for a straightforward direct-conversion heterodyne detector, having a tuning range of about 10 kHz to 120 kHz. It has been optimised for the use of an electret microphone. The current consumption is very low at only 8 mA, which allows it....
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CXA1019 Japan SONY companys high-performance, high sensitivity FM AM radio special manifold. CXA1019 high integration, includes FM/AM tuner circuit, a mixer circuit, a mute cir..
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One of my prize pieces of equipment is a pair of Sony C-37A large capsule tube, condenser microphones. I bought these from the radio station at college because they were getting hard to use, and an intermittent connector problem resulted in a nasty....
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The control voltage is fed into the first half of a 1458 op-amp, this stage inverts the signal and sets the offset and gain for the right channel gain control circuit. This signal is then fed into the second half of the 1458 op-amp which inverts the voltage....
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This is the fully featured, jammed packed temperature readout unit. I can measure temperature from up at 8 DS1820 digital temperature sensors all on the same 1-wire bus. That's right only 3 wires are needed to go to all the temperature sensors, GND, VCC and....
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An input signal drives both SN74 74 D-type flip-flops, which are positive edge-triggered devices. A low-to-high input signal transition triggers tbe A flip-flop, while a high-to-low input signal transition triggers the B flip-flop via tbe SN7404 inverter.....
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Sawtooth wave oscillator? circuit can be implemented using several methods, here we present one design that employs 555 IC.? Here is the schematic diagram of...
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All errors in circuit diagrams, documents and layout are corrected. The circuit as shown below is functional and working. Note that Q2 is sensitive and easily destroyed by wrong connection, shorts, over-voltage or too much current. What does that mean If....
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As shown in FIG, VT1 ~ VT11 base bias circuit 11 added to the binary data (high level 1 to low level 0 ), there are 211 2048 combinations. When a bit is low, the corresponding ..
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Microcontroller based old water tank fillercircuit diagram. difference between microprocessor and microcontrollerppt, parallel port interfacing projects with microcontroller, microcontroller use in real live, circuit diagram of avr microcontroller trainer,....
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This circuit is a circuit diagram to convert the speaker into the microphone. In principle When sound waves fall on the diaphragm of a speaker, there will be fluctuations in the coil and the induced voltage will be no small proportion. This induced voltage....
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4033 7 Segment Common Anode Display Event Counter Circuit This circuit can count 0 to 9 with reset and display test....
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A simple digital circuit is shown can be used to precisely control the AC power supply, the circuit is no digital to analog conversion circuit. In the application, the effectiv..
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Forklift electric drive system consists of two DC series motors and control equipment. 4. 5kW electric motor driving through a mechanical transmission mechanism Mi, driving forklifts for forward and backward travel. 6.skW pump motor M2 machine after machine ..
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R2 will have to be adjusted to set the proper finish charge voltage. Flooded and gel batteries are generally charged to 13. 8V. If you are cycling the battery (AGM or gel) then 14. 5V to 14. 9V is generally recommended by battery manufacturers. To set up the....
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The metal detector shown here may well represent a new genre. At any rate, after some exposure, it is regarded as such by those who have seen it. It is based on a standard transformer coupled oscillator(TCO) - hence the name Coil Coupled Operation (CCO)....
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Hi, I`m working towards an hybrid amplifier where the VAS will be the Aikido, where the OPS is some Emitter-Follower variation. Unfortunately my....
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Using the LT3694 monolithic, current mode DC DC converter can be designed a very simple step down converter that will can support a maximum output current of 2. 6A. LT3694 switching step-down converter (capable of generating up to 2. 6A at its output) has....
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Thyristors are a class of semiconductor components exhibiting hysteresis, that property whereby a system fails to return to its original state after some cause of state change has been removed. A very simple example of hysteresis is the mechanical action of....
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Both collector and base-emitter bias transistor is coupled directly to each other. Each transmitter circuit capacity control conversion function. The emitter generates a triang..
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This is a simple proximity switches with IC 4049th The IC4049 is a bipolar monolithic integrated circuit for use in metal-detection system / proximity sensing applications IC4049 includes an oscillator constituted by an external parallel resonant tank....
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Imagine being faced with a dozen or more cable ends, all the same colour and bearing no identification. The other ends emerge in another part of the building, and you have no way of knowing which is which. You could use a continuity tester and a long length....
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Tone control circuit using opamp and a baxendall passive tone control circuit. Overall gain is 25db with 20db boost & cut. Powered using 15V dual supply....
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A simple NiCd charger can be built using junk box components and an inexpensive LM317 or 78xx voltage regulator. Using a current limiter composed of R3....
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With the aid of an (old) moving coil instrument it is very little effort to make a simple voltmeter that, at a glance, indicates the status of a telephone....
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The preamp featured is very straightforward to make on the PCB, and has an innovative tone defeat function. Rather than completely disable the tone controls, they are massively de-sensitised, and when "defeated" have a maximum range as shown in Fig. 3....
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The residual-current circuit breaker in Figure 1 continuously monitors the supply lines for any leakage current and immediately disconnects the supply if necessary. Load-supply wires, both live and neutral, pass through the magnetic core of the CR4311-5....
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The circuit was designed to create ten different frequency bands to be handled by a single graphic equalizer to produce and maintain a predetermined area....
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This circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in this particular circuit is the LM324. It is a popular IC and should be available from many parts stores. The 1K resistors in the circuit are essential so that the....
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This circuit shows how to use an ordinary LED as a light sensor. It makes use of the photovoltaic voltage developed across the LED when it is exposed to light. LEDs are cheaper than photodiodes and come with a built-in filter, which is useful when the....
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CCFLs are often used to backlight the LCD displays of portable computers Such lamps require a high-voltage sine-wave drive. This circuit provides such drive and permits lamp intensity to be varied continuously and smoothly from zero to full intensity. Notice....
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One section of the MC10101 is connected as a 100 MHz crystal oscillator with the crystal in series with the feedback loop. The LC tank circuit tunes the 100 MHz harmonic of the crystal and may be used to calibrate the circuit to the exact frequency. A second....
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This document presents an overview of the hardware design of the Handy Cricket...
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Two cheap CMOS ICs and a few transistors was all that was required to rebuild my elderly TTL automatic morse keyer into a low current lightweight battery powered iambic morse keyer. Sometime over the past year or two, my elderly Accu-Keyer gave up the ghost....
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Automatic light is introduced by the telephone block system, the phone rang that night and asked the owner to pick up the handset or pull L, the lamp will light up; the phone s..
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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 current-limiting circuit, shown in this example as part of a small bench power supply, could in principle be used in conjunction with any dual-rail current source. The part of the circuit to the left of the diagram limits the current at the input to the....
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Audio AGC can keep track, monitor audio preamplifier output signal level when the input signal increases, AGC circuit automatically reduces the gain of the amplifier; when the ..
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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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Current regulator acts like a load when connected to a voltage source, or in series between voltage source and real load. The main characteristic of a current....
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Large input-to-output voltage differentials, caused by wide input voltage variations, reduce a linear regulator`s efficiency and increase its power dissipation. A switching preregulator can reduce this power dissipation by minimizing the voltage drop across....
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Bipolar transistor amplifiers must be properly biased to operate correctly. In circuits made with individual devices (discrete circuits), biasing networks consisting of resistors are commonly employed. Much more elaborate biasing arrangements are used in....
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The infra-red (IR) toggle switch project described here is aimed to provide control mechanism for electrical appliances that do not have remote operation features. The goal is to construct a black box where you can plug-in your 120V AC appliance and control....
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For the long-distance listener (dx-er) it is a treat to listen on a band 8MHz wide which normally is completely empty, but which is capable of providing periods of clear reception during the `Sporadic E` season from several distant countries. Usually only....
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Dynamic flip-flops ignore pulses at their inputs that are shorter than 40 ns or do not have TTL levels. This means that TTL flip-flops are poorly suited to....
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If the amp is built on bipolar transistors, and the preamp/crossover on FETs, then they were designed by different guys, right? Not this amp. Here, a strong, experienced designer`s hand is evident from schematic to parts layout, PCB routing and general....
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The Rockwell Jupiter TU30-D140 is a OEM (Original Equipment Manufacterer) GPS receiver module that is designed to be implemented as part of a larger design, like a vehicle tracking system, navigational system, time/clock reference etc. This is a 12....
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The Car Temperature Gauge is basically the same circuit as March`s project with some minor changes to the input circuit. This circuit will display the water temperature to 1 degree resolution...
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The circuit used was basically for audio mixing, it had an input from the triangular wave generator and the noise generator. And it is passsed through the audio mixer to form the wave...
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There are systems in which it is imperative that the supply voltage of, say, a motor, always has the correct polarity. It is, of course, possible to use a....
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An astable multivibrator, often called a free running multivibrator, is a rectangular wave generating circuit. The circuit doesnt need any triggering. The timing of the circuit is determined by the resistors and the capacitors used in it. The details of the....
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Locker Guard Circuit Diagram. This tiny circuit can protect your Locker or Almirah from a burglary. If the locker opens in the armed state, the circuit generates a loud police siren to thwart the attempt of burglary ..
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The Tupperware Turret circuit is as simple as things can get whilst still maintaining full functionality. The main parts seen in the schematic below are the: 18F4520, Servo Motors, IR Receiver and TIP120. The batteries used for this project are 4 standard AA....
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This is a design circuit for generates a good 1 KHz sine wave adopting the inverted Wien bridge configuration (C1-R3 & C2-R4). It features a variable output, low distortion and low output impedance in order to obtain good overload capability. The figure is....
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Welcome to the weblog where we discuss about electronic circuits schematics, PCB design, diy kits and electronic projects diagrams. Rain detector using In principle it is an astable multivibrator 555, which is prepared by IC555 with a sensor attached that....
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8 solid-state-relay (SSR) and ADAM-4068 (Serial-I/O device) and ask me to wire a circuit to control a motor for his robot. ADAM-6048 is a handy device that let you control digital input and output via RS-485, serial communication given a protocol in its....
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Hi! I have a 4 switches that I`m goin to connect to a USB joystick board. The USB board has +5V and ground connections, and emulate a button press on....
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The term Arduino actually refers to a system of components that include the board, the microcontroller, the boot-loader, and the programming environment. It is a system designed to `protect` the user from a lot of the complication that is part of....
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All you have to do is insert the pieces so that things that should connect are on the same lane. To make things even easier, you can break lanes, or join lanes with a wire link. Right, this brings me to the meat of this post. How can we automate this, to get....
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The inspiration for the project came after attending the HamRadio 2000, Millenium Ham Meet @ Hyderabad (December 22, 23 & 24) where I met Grand Masters like VU2NR and VU2RM, OM Raju and OM Rao respectively. VU2NR`s newest design the NR-80 inspired me on....
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This project has two options. It can be a mains operated project, using a 2155 or 2156 transformer or it can be connected to a plug pack.
We recommend it be connected to a 16v AC 1 amp plug pack as these are double insulated and provide complete safety for....
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This little circuit will help you to scan the line of a 220V live wire in the wall. The FET gate is connected to a capacitive metal sensor (which is usually a simple metal plate). When you hold the sensor close to the wall, the LED will indicate the current....
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When switch SWl is positive, the FET is turned on, and has a resistance of about 400 ohm. The input voltage charges up the capacitor through the FET. When SWl is negative, the FET is turned off (pinched off). To get a long storage time, the op amp must have....
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This document is written in attempt to include everyone interested in serious construction of a quality product. Its very technical, however, written openly and honestly. It`s designed for Amateur Radio (not commercial) at no cost to obtain and is open for....
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This device allows you to control remotely any (with suitable add-on expansion boards, up to eight) device, such as lights, water heaters (boiler), air-condition, plant watering, alarms, etc via a relay. By using it you can for example water the garden at....
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The circuit has a flat frequency response from about 20Hz to well over 50Khz. Input sensitivity is 100mV for a full scale deflection on a 100uA meter. Built on two common emitter amplifiers, the first stage has a preset resistor which may be adjusted for a....
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This is a 22 Watt car stereo audio amplifier. The circuit is based by a single IC TDA1553 with a few peripheral components, this IC hope against hope code name your stereo car audio classification. The IC TDA1553CQ contains 2G—22 W amplifiers with....
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The TK10931V is an IF IC contains 2 IF systems ( one is for FM, the other is for AM ) and detector. It is suitable for amateur Radios CB Radios scanner receivers, utility Radios and so on. By Toko Inc. ..
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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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LM2002 / 2002A is an audio power amplifier integrated circuits, LM2002A high pressure protection, the maximum instantaneous power supply voltage up to 40V 5-pin single in-line plastic package...
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The pseudorandom sequencer drives a solid-state relay. If you power a low-wattage lamp from the re..
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Automatic Fan Control circuit. This circuit is ON / OFF 12V DC fan or die CPU fan factory IF temperature above normal again temperature.You Can Feed the temperature of VR1. This circuit uses...
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Originally Posted by Harvey The inside of a sphere is always zero volts potential, so it will keep taking new charge indefinitely from the coil-pack ..
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The idea is that the infra-red light is reflected by the disc, except by the dark red line. The reflected light is received by the sensor and this way the Arduino can keep track of the number of revolutions. Note that the infra-red sensor is sensitive to a....
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CB85-10 leakage protection circuit diagram, T for the trip coil, SB is the test button, Ri is simulated human resistance ..
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This is a circuit schematic diagram for the VU meters. Circuit diagram is controlled by IC TL072. A measurement circuit according to the National general application. Around the input circuit IC1 to make adaptation and amplification of the trimmer TR1....
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This is a good Electrical & Electronics mini project report on "Remote Controlled Fan Regulator" and submitted in accordance with the curriculum requirements for sixth semester of the degree course in Bachelor of Technology in the branch of Electrical and....
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Standard linear amplifier according to the standard connection conventional circuit configuration, the power of the beam tube tube according to Figure 1-8, the river. The output stage uses power tubes EL34, KT88. KT100 and other radio beam tetrode,..
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Colpitts oscillator. Its frequency depends on the capacitance of the vary cap diode. The center frequency is changed by varying the biasing voltage of the vary cap through the 47K pot. You can use a 75cm telescopic antenna or simply a length of hook-up wire.....
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In its simplest form, a voice-over unit is just a microphone and change-over switch feeding an amplifier, the output from the microphone having priority over the amplifiers audio signal when the "push-to-talk" switch is pressed. In this circuit, a....
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an FM modulator that modulate a carrier frequency with the composite signal, and an RF amplifier that provide enough power to be transmitted through antenna. Here is the schematic diagram of theFM transmitter circuit: The core of this stereo FM tra....
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Here is the circuit diagram of a fuse that has an automatic status indicator. This circuit can be added to circuit that operates from 12V DC. As long as the fuse is intact, the LED D3 will glow continuously and when the fuse blows off the LED will start and....
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This small amplifier is constructed around the TDA2003 IC, capable of delivering 4Wrms at 4ohms. The TDA 2003 has improved performance with the same pin configuration as the TDA 2002. The additional features of TDA 2002, very low number of external....
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This is a simple touch switch circuit, the 555 timer is configured as a one shot multivibrator that is triggered by touching the touch terminal. In this monostable mode, the timer generates a fixed pulse of about 4 seconds whenever the trigger voltage falls....