New Circuits Page 198
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The Mark III conductivity-temperature-depth (CTD) profiler has been the mainstay of modern physical oceanographic research1. The MKIIIB CTD provides high quality oceanographic data when used by skilled personnel and are frequently re-calibrated. The design....
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The FAN2001/2 (datasheet) Evaluation Board is a compact circuit including either the FAN2001 MPX or the FAN2002 MPX in a 3x3 MLP package..
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You have to admit that these tiny electronic lamps are handy, and they last almost forever. Around 40 years after Nick Holanyak developed the first LED, they have become just about indispensable. Any self-respecting electronics hobbyist always has a few in....
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This chapter provides detailed schematics of a variety of power supplies suitable for use with the common Ar/Kr ion tubes available to the hobbyist on the surplus market. Included are examples of commercial designs (Omnichrome 150R and 532 head, Lexel 88 and....
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Using this circuit, we can accept positive or negative or differential control voltages. When the control voltage is zero, the output frequency is zero. To....
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The simplest one transistor audio mixer circuit diagram on the net. It has only one transistor and can support as many audio signal as you can afford. BC10....
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Make a signal generator from easily obtainable parts. Square wave, variable frequency, variable pulse width. This can be used for many things such as DC motor speed control, lamp or LED dimming, Transformer drivers. Ignition coil circuits and other high....
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AN79 Linear Technology AN79 modifies methods presented in AN74, permitting verification of 30 nanosecond amplifier settling times to 0. 1% resolution. sampling-based technique used is detailed and results presented. Appendices cover oscilloscope overdrive....
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These have two coils and are controlled by changing the direction of the current flow through the coils in the proper sequence. These motors have only four wires and cannot be connected to this kit. See our Kit 1406 for a Bipolar Stepper driver Kit. 2.....
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It does not require the establishment of a separate power switch or transformation to switches in the table. The circuit has the advantages of low power consumption, stability and reliability, no effect on instrument accuracy and so on. The transformer T in....
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The problem with sound cards is that they bandpass their input signals. So, if you are wanting to record any signals below 20Hz or so, you are out of luck, ordinarily. There are two solutions to this problem that I have found. The first, is that if you are....
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This is a circuit that can be used for dark activated means the relay will be activated when thelight intensity fall below a certain threshold. Without hysteresis, the relay will be activated and deactivated if the sensed brightness fall under or rise above....
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This circuit can be used to charge Accu and cells battery, the circuit can has a very stable output that would make the battery last longer and maximize the added battery capacity. When charge was also quite fast, so it can optimize the time. A diac is used....
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Use a PIC Microcontroller to Control a Hobby Servo This instructable describes how to integrate hobby servos (the kind used in RC planes, cars, etc.) into....
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Today I has 12V to 5V 3A DC converter step down Regulator circuit come to deposit. In sometimes friends have power supply 12V 3A, but want Voltage 5V 3A for digital Circuit. This circuit can meet the demand of friends get, by it uses normal electronic part....
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In this halogen switch circuit we use a FET transistor because the current is dependent of the FET`s gate voltage. The maximum gate voltage is 12V, so this circuit is adequate for 12 volt lamps. R1 value is 100 k © for 6V and 470 k © for 12V. You can use....
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The subwoofer is a subwoofer or a speaker to reproduce low frequencies, devotee of 20 Hz to 150 Hz electronic circuit diagram below shows the details of a scheme of the main amplifier TDA1516 22 watt in 4 ohm car subwoofer driver. This device is designed for....
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The circuit was designed to work with an audio power amplifier which operated off 18v-0v-18v power rails. The actual voltage used is not too critical except that the feedback is referred to the LED chain which itself is anchored to a 12v rail, hence the....
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The AVANT uses a Switched Mode Power Supply which means the heart of it is a 32khz ramp oscillator which is stopped if the overload protection circuit detects an overload. Without the oscillator running the 8 volt Standby voltage is not generated and is why....
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A simple tutorial on using ADC (Analog to Digital converter) unit of AVR micro controller illustrated using Atmega8 with circuit diagram & codes....
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This one of its kind and hard to find triac control AC voltage stabilizer circuit has been designed specifically just for you. Being solid state in design, the voltage switching transitions are very smooth with minimum wear and tear, resulting in efficient....
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Hi, does somebody have a good 211 / VT4C schematic like Air Tight ATM-211 to recommend ? If it`s possible without interstage transformer and 6SN7....
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This section gives step-by-step instructions along with photos to the construction of IR Proximity Switch. Because this is a very simple circuit, only a schematic for the sensor is shown here: (For the PDF format click here. ) This tutorial`s objective was....
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Using VFC110 chip, we can build a high frequency voltage-to-frequency converter. The features of this chip include the capability of high frequency operation, disable function, and an on-board precision 5V reference. This precision reference can be used to....
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This is Positive High-Voltage Hot Swap Controller circuit with Power Limiter. This circuit uses the TPS2491 or TPS2490 because both of them have some...
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The memory system design: the detailed timing waveforms for a static RAM component, and the design of the register and control logic that surrounds the memory subsystem, making it possible to interface the memory to the rest of the digital system. But first,....
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Protect your home appliances from voltage spikes with this simple time delay circuit. Whenever power to the appliances is switched on or resumes after mai....
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The thermistor RT and R1, R2, R3 and RP1 form a temperature measurement bridge. When temperature is at 20 ?, using R1, R3 and adjusting RP1 can allow bridge to keep balance. When temperature rises, the resistance of the thermistor RT reduces, the bridge in....
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Atmel`s application note AVR109 describes a bootloader that uses the UART to communicate FLASH programming instructions. They also provide some sample code in C that allows the programming of FLASH, EEPROM, and lock bits. Note that the AVR109 bootloader does....
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You can add as many extra zones as you like to the SCR Burglar Alarm System. The first circuit is designed to be used with the usual types of normally-closed input devices such as - magnetic-reed contacts - micro switches - foil tape - and PIRs. The second....
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AM Transmitter. It is illegal to operate a radio transmitter without a license in most countries. This ircuit is deliberately limited in power output but...
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This project sprang from the need to be able to remotely control audio-visual equipment placed inside cupboards. RF-based commercial units such as those u....
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When the microphone detects a loud sound, this circuit will turn the LED on. The `charge-pump` section consists of the 100n, 10k, signal diode and uF....
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The LTC4251/LTC4251-1/LTC4251-2 negative voltage Hot Swap controllers allow a board to be safely inserted and removed from a live backplane. Output current is controlled by three stages of current limiting: a timed circuit breaker, active current limiting....
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Many electronic circuits related to fan speed controlling have been published here and this one is just another approach. The circuit diagram shown here is of 12V DC fan speed controller using the IC LM2941CT which is a low drop out 1A voltage regulator. The....
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The Circuit is the diagram of a simple three band graphic equalizer circuit. An IC called LF 351 IC is used here...
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This circuit is the opposite of Repeating Timer No.3 . Its operation can be limited to the hours of darkness. Again - the variable resistor (preset) lets you choose the level of darkness at which the timer will begin to function....
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The MAR6 (MSA-0686, 0685, 0885) is a high performance silicon bipolar Monolithic Microwave Integrated Circuit (MMIC) housed in a low cost, surface mount plastic package. This MMIC is designed for use as a general purpose 50 W gain block. Applications include....
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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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The goal of this project was to build a circuit that would monitor a person`s sleep activity and, eventually, give feedback on that activity to the user. The purpose of this was to induce lucid dreaming in the subject. When sleeping, people generally....
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Simulation of Colpitts Oscillator circuit using npn transistor and other components available in SimElectronics is shown. The feedback ratio is determined by the relative values of the Capacitors C1 and C2. Frequency of oscillation is given by f =....
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The high performance of modern set-top DBS TV tuners require broadband voltage control oscillator (VCO) designs at a competitive cost. To realize these goals, design engineers are challenged to create high performance, low-cost VCOs. The traditional design....
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This is not very critical and any other device (such as tape player with message recorded on an endess tape) which does not overload the circuit or the telephone line, may be used. The incoming line is protected by metal-oxide varistor (MOV) RDN 130/14....
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The overall block diagram of the system. Audio comes in at the left, and is summed, differenced, multiplied, delayed, filtered, and all other imaginable manipulations. The output is a set of 5 discrete audio channels plus one low frequency effects channel.....
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I built my first power amplifier when I was still in secondary school. The circuit was made of transistors, didn`t provide much power and had an ugly PCB. Around the same time I got access to a datasheet of TDA1524, a tone/volume control circuit, and I....
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A PFC capacitor on the mains side can act as "current limiting" to some extent. Otherwise, use resistive or additional inductive ballast (a MOT in series with shorted secondary winding). Power factor correction (PFC) shifts the VA rating of the transformer....
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I chose the Nexus 4 as these devices are traditionally very open, as you can see in case of the Nexus 4 e. g. by the availability of Ubuntu Touch images. I didn`t expect however for it to be that hackable as I was about to find out on Saturday. I had just....
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PWM waveforms are commonly used to control the speed of DC motors. The mark/space ratio of the digital wave-form can be defined either by using an adjustable analogue voltage level (in the case of a NE555 based PWM generator) or digitally using binary....
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Mixed Analog/Digital Design Using Split Power, Ground Planes The next example shows how to design a circuit with a mixture of analog and digital parts with multiple power planes and with a single ground plane split into analog and digital sections that have....
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This is a design sensor circuit that can be used for sensing the light. This circuit is using a comparator LM311. This circuit is very simple design. This is the figure of the circuit. This comparator is powered from 12 V DC supply and does not require....
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The photodiode can be used to detect IR reflected from the object. However, IR produced by the ambient conditions also detected by the photodiode. This IR noise must be filtered to prevent false detections. Usually, the LED`s IR signal is modulated with a....
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The circuit is based on the IC BA1404 from ROHM Semiconductors. BA1404 is a monolithic FM stereo modulator that has built in stereo modulator, FM modulator, RF amplifier circuitry. BA1404 FM transmitter can be operated from 76 to 108MHz and power supply for....
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The following circuit shows about A Phase Controlled Triac (HT-32) Circuit Diagram. Features: Dsimple circuit, bilateral trigger diacs offers a ....
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The list of best & free Android Applications for the Electronics & Electrical Engineers like simulators,resistor color code,electronic tool kits....
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It`s very simple circuit using DTMF decoder MT8870 (or CM8870). As shown in the circuit, u`ll receive an interrupt ( if NAND output is connected to INT of the microcontroller) whenever u receive a call or make a call and then u can use yr program to read the....
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A dual-RCX, six motor dog. Slashdot Review. Cindy Salwen pointed out a description of the protocol for the serial interface between the computer and the Dacta Control lab. This may or may not be related to the protocol used by the RCX, but if you`re reading....
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The circuit above makes use of the CMOS 4017 decade counter IC. Each depression of a switch steps the output through 0 - 9. By coupling the output via an AND gate to the next IC, a predefined code has to be input to create the output. Each PBS switch is....
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This circuit is built around a 555 timer using very few components. Since the circuit is very simple, even a novice can easily build it and use it as a controlling device. A laser pointer, now easily available in the market, can be used to operate this....
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We can use the flash beam to supply the remote control for the AC power devices. The important point of this device is the memory function. It can continuously supply the power to the device. When it acts the second time, the power will be cut off....
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A high quality stereo FM transmitter circuit is shown here. The circuit is based on the IC BA1404 from ROHM Semiconductors. BA1404 is a monolithic FM stereo modulator that has built in stereo modulator, FM modulator and RF amplifier. The FM modulator can be....
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When SW1, SW2 or SW3 are open the input sensitivity is suited to high-output devices like CD players, tuners, tape recorders, iPods, miniDisc players, computer audio outputs etc. Sometimes, the 750 Ohm value for R3, R13 and R17 resistors could be not easy to....
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For those who are lazy like me, turn on or off the bedroom light without getting out of bed, simple clap your hands is amazing. Thinking about it I projected one for me. Several projects of clappers can be found on the Internet, and most of them do not use....
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For months I`ve been looking for a simple FM BUG project, the ones online require inductors which you either have to acquire or build, if you don`t have a LCR meter it becomes rather hard to get the circuit working, specially if you`re a beginner without an....
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Battery Eliminators are the circuits, which creating DC power supply from AC Mains. Basically battery eliminator circuits are the compination of step down transformer, rectifier and voltage regulator. Here is a simple circuit of a Multipurpose Battery....
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The Sovtek 5881s that come in these amps are cheap and sound like it. Change ALL tubes. Get a Sovtek GZ34, Valve Art or GT KT66s, and Ei Gold preamp tubes. Rebias the KT66s to around 40ma at idle. Do not get Sovtek or "Golden Dragon" KT66s, as these are not....
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Nowadays most of the devices are running on 3.3 volts, and likewise their communication levels also work on 3.3 volts. For example XBee runs on 3.3 volts and to interface it with microcontrollers running on 5V, one needs to translated voltages levels so that....
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here is a pic running 36v 500ma on the front, 36v charging on the back. Brightness is approaching level of a 240v globe, considering its a 20 watt....
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I`ve designed IFA antenna in Altium as described in DN007 and created a balun circuit from the schematic design of CC2500EM Reference Design (swrr016a). I`m very new to RF designs, as I could understand from application notes and forum posts; this design....
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C141C datasheet, .Selling leads from all over the world, ChinaICMart is the world`s biggest IC trading marketplace on the internet. We offer finest suppliers for C141C, you can also download the datasheet for C141C..
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A project on Obstacle Avoidance & Navigation of Path Tracing Manipulator for Industrial Robots. A robot is an automatically guided machine, able to do task on its own. Another common characteristic is that by its appearance or movements, a robot often....
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I took 22 used, octal, 6. 3-volt, 600mA, controlled-warm-up tubes (mostly 6SN7s) and 22 octal tube sockets and an old extension cord and wired all the sockets in series. Then I plugged the series into a wall socket and reveled in the soft glow of 22 tubes....
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HeadPhone Amplifier OR PreAmplifier OutPut Stage This 1 watt amplifier lends itself par excellence for use as driver for low impedance headphone....
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The circuit presented is a low-cost laser-diode driver with current limiting and a lasing monitor for safe operation of the laser. The driver provides temperature stabilization using a built-in thermoelectric-cooler (TEC) controller. This circuit is designed....
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Filtering thermocouple wires assures highly accurate temperature measurement, preventing thermocouple noise pickup, decoupling thermocouple signals, reducing thermocouple measurement error, thermocouple noise filter circuit reduces thermocouple error....
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Zener diode regulator is a basic electronic circuit which is very useful for those interested in hobby circuits. This circuit is used for obtaining a regulated voltageat the output which can be used for biasing other circuit elements. Now how to use zener....
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This intercom uses an ordinary speaker to function as its microphone. Once the button is pressed, the relay toggles, and the speakers interchange their functions. One works as a normal speaker and the other one works as microphone. ..
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The PC processor generates very high temperature during its operation which is dissipated by the large heat sink placed above the processor. If the heat s....
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This is a circuit that can be used for detecting sounds and providing an output signal when a sound is detected. This output signal may be fed to another circuit that sets off an alarm when the signal is received. This circuit is therefore useful in security....
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Frequency range is 100-108 MHz. The circuit is only mono circuit, and accepts an audio input from either a microphone or other source. The input impedance is 1Mohm. The input sensitivity is 5mV and the max input signal is 10mV. The transmitted signal can be....
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This is a very good integrated circuit. There is no need for any external glue logic to drive the circuit, there is only 2 pins to drive the motor, one for controlling the direction and the other to trigger the stepping pulses. It provides a very compact....
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Amplifier circuit is very suitable for use in subwoofer speaker, because its strong. This circuit using ic, ic based on STK. to use it can be used on cars that use speakers or a subwoofer system in his car. 30 V supply voltage that has been rectified. Power....
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This PIC16F877 microcontroller tutorial answers the question, "" How to implement a controllable digital clock using PIC16F877 ? "" Using PIC16 simulator (Pr....
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This circuit is the opposite of Repeating Timer No.5. It will only begin to operate if the temperature falls below the preset level. Again - the variable resistor (preset) lets you choose the temperature below which the timer will function....
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The simplicity of a traditional die makes it exceptionally difficult to create a fully equivalent electronic version, if only because an electronic version requires a power supply and a collection of electronic components that occupy a much larger volume....
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Let`s construct a low-power FM transmitter using surface-mount devices (SMD) that will be received with a standard FM radio. Soldering surface mounted devices is not so hard and actually is quite easy. There are many designs for small FM transmitters but....
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Simple and easy build of FM transmitter circuit. The circuit only require 2 transistors. Circuit Notes: Typically the default for the capacitors model is ceramic, preferably the npo 1% type or equivalent. However, generally almost nothing critical right....
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The HP Model 400A Vacuum Tube Voltmeter is unusually flexible because of its wide frequency and voltage ranges. AC Voltages as small as. 005 and as high as 300 volts can be simply and directly measured without any precautions over a frequency range of 10....