New Circuits Page 143
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Using the LM2876 audio power amplifier circuit can be designed a very simple high efficiency power audio amplifier capable of delivering 40W of continuous average power to an 8 © load with 0. 1% THD+N from 20Hz 20kHz. The LM2876 audio power amplifier circuit....
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It doesn`t break if being little even if it crosses the value of the input/output electric current characteristic. It breaks when short-circuiting and doing the extreme thing in the output. It is explained by the following circuit operation but because the....
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Argon and krypton (rare gas) ion lasers find applications in many diverse fields including (1) very high performance printing, copying, scanning, typesetting, photoplotting, and image generation; (2) forensic medicine, general and ophthalmic surgery; (3)....
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The MOSFET input of the CA3140 makes it ideally suited for use in a high impedance DC voltmeter. Switch S1 is the range selector. The input impedance is limited to 10M by the resistors used in the voltage divider, but this is still a very acceptable value.....
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This simple alarm timer circuit is made with 4060 which has an integrated oscillator with a good stability with a relatively wide frequency range. In the c....
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Here`s a really simple and inexpensive Power LED driver circuit...
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A term used when referring to a robotic control concept, developed by Rodney Brooks, which is strongly associated with Behavior-based robotics, a branch of robotics research that incorporates modular Behavior Based AI Whereas traditional Artificial....
-
A Transistor is an electronic component which enables a small current to control a much larger current. This feature is very useful in many renewable energy projects and other applications. Click here to read our Introduction to Transistors. Pictured below....
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A very popular type of LED that has finally come about is the tri-color, RGB LED. The RGB stands for: red, green and blue since the LED is capable of displ....
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-
Here is the circuit of 20W audio amplifier using LM1875 IC. LM1875 is a very high quality low distortion 20 Watt audio amplifer IC available in TO-220 package. This IC has many built in features like thermal shutdown, current limiter, high gain, high current....
-
This electronic rf detector electronic project is designed using common transistors and other few common electronic parts. This rf detector responds to RF signals bellow the standard broadcast band to well over 500 MHz and provides an visual, and audible....
-
Im working to build the CountryHick DI as shown on DIYFactory, with a couple of minor modifications. Eventually, This is going to be a 1u unit with 4....
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High Quality very simple unit, No need for a preamplifier Amplifier parts: P1 = 22K R1 = 1K R2 = 4K7 R3 = 100R R4 = 4K7 R5 = 82K R6 = 10R-1/2W R7 = 22R R8....
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These netbooks use ALC5632 audio codec plus mixer IC which has quite some amount of knobs and switches. Most of them are available for direct manipulation with alsamixer, GNOME Volume Control and other applications that interact with ALSA mixers. Here ALSA....
-
You will need an oscilloscope capable of displaying in X/Y mode, and a reference "LO" signal source. In-phase and Quadrature reference square wave signals are generated by a divide by 4, 2 bit ring counter using 2 D type flip - flops. So that I could use an....
-
A circuit that can be used to flash two Christmas stars alternatively is given here. The IC1 NE 555 is wired as an astable multivibrator here. When there is a positive pulse from the output of IC1, the transistor Q1 conducts and the relay K1 gets activated.....
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The Flash MC Experimenting Board I is an ideal platform for all developements in conjunction with the Atmel Flash microcontrollers AT89C1051, AT89C2051 and AT89C4051. It is not only recommendable for starters but also very much recommendable for the advanced....
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The following circuit shows about Sound Operated Flip Flop. This circuit based on the LM324 IC. Features: condenser microphone is used for picking ....
-
The objective of Linkwitz` article was to reduce distorted spatial reproduction when listening to recorded stereo music with headphones-the "super stereo" effect where the music seems to be coming from inside one`s head. To remove the spatial distortion,....
-
Crystal with small CL(7. 0 pF) makes larger oscillation allowance, smaller current consumption and worse frequency stability, like below table. As the actual board layout and choice of external components influences the best suitable crystal load....
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The capacitors C5 give with IC1, The resistor R1, R2 and, capacitors C1, Which build the circuit model astable multi vibrator Square wave generator, at the frequency about 2KHz come out the way pin 3 of IC1. By have capacitors C3, C4 diode D1 and D2. Which....
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This is a low cost, antenna-mounted, this UHF TV pre-amplifier circuit can add more than 25db of gain. The first stage of the pre-amplifier is biased from optimum gain. L1, L2 strip line equivalent with Lambda/8 of PC board. An RF power amplifier is a type....
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The system described here is a four motor rotary wing aircraft with 3 inch propellers. The overall size of version one is about four inches. A 418MHz digital radio is used for communications and control and an onboard PIC17 microcontroller and L293DD mosfet....
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The musical signal`s form does never resemble a square wave. The frequency range perceived by an average adult hardly goes above 17KHz. Hence I do not give a dime to those heated discussions whether it`s appropriate to test audio amplifiers using a 100KHz....
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The meter has only one scale (0. 150) but this also used for 0. 75 and 0. 30. This is such a pain, and all people use a calculator with it. I made a new meter scale for it, with all ranges. This improves the comfort so much New Meter Scale for your L3-3! Due....
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One of my student has made a disgraceful robot that used two stepper motors and with a simple IR sensor. Yes, above picture is what I`m talking. Without battery carrying, a little bit torque of the stepper and misalignment of driving shaft, makes it crawling....
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4-channel SQ logic decoder. Current drain is 75 mA at 20 volts. Input impedance is 2M, while output impedance is 2K (courtesy GTE Sylvania Incorporated)...
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Here is the ambit diagram of an opamp based subwoofer filter. Audio frequencies beneath 200Hz are advised to be in the subwoofer range. So a subwoofer clarify will be about a low canyon clarify with a cut off abundance of 200Hz. The alive of this beeline....
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A touch switch for a USB powered desk lamp, and the touch switch isn`t working. The circuit diagram, layout and pictures are below. I used the circuits from the following two websites to design the circuit: the 4th circuit. I`ve joined the output of the....
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The National Semiconductor LMV225 is a linear RF power meter IC in an SMD package. It can be used over the frequency range of 450 MHz to 2000 MHz and requires only four external components. The input coupling capacitor isolates the DC voltage of the IC from....
-
-
Buffer amplifier is required by a typical pH probe to isolate its 10^6 to 10^9 ohm source resistance from external circuitry. Such an amplifier is shown in the....
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This is a simple arduino project for a soil moisture sensor that will light up a LED at a certain moisture level. It uses Arduino Duemilanove microcontroll....
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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 conveys a sense that it has intent or agency of its own. The word robot can refer to both physical....
-
Apart from the obvious usage as a headphone amplifier, the circuit can be used for a range of applications where a wide bandwidth low power amplifier is needed. The circuit is based on an opamp, with its output current boosted by a pair of transistors..
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High quality mono audio amplifier circuit. This amplifier is built on the classic symmetrical scheme with output stage operates in class AB and has a pretty good sound, with no complicated setup and scarce components. ..
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-
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This is Infrared Remote control transmitter circuit has high performance and can be applied to works with the various infrared receiver circuit. To made easily. And best to save your money. - Then another circuits, is designed to have wider applications. Can....
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This is a wide band shortwave SW antenna amplifier. The frequency band is 1 to 30 MHz and a medium gain of 15 dB. The input stage is built with MPF102 and....
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Variable-gain amplifiers (VGAs) can be used in may types of systems, such as radio receivers. In this system, the input signal voltage depends on an...
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We can bring the inverter CMOS digital IC is CD4049 Hex Inverting Buffer IC, to design the Square wave oscillator generator....
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Barrage (noise) jammer for VHF/UHF communications. Based around an old TV tuner with its local oscillator tapped and amplified. The tuner`s voltage tune line is mixed with a sweeping, random noise signal...
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The circuit shown in this schematic diagram is a square-wave oscillator circuit. The main component of this oscillator circuit is LP165/365 comparator. As....
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This circuit is maintain a constant voltage, the output voltage is adjustable. Serves to reduce the input voltage, and keep the voltage constant. The Q1 2N3904 is the amplifier model. common-emitter. This causes the voltage across the collector`s pin with....
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This circuit was developed since a number of visitors of this website requested a timer capable of emitting a beep after one, two, three minutes and so on, for jogging purposes. As shown in the circuit diagram, SW1 is a 1 pole 9 ways Rotary Switch. Setting....
-
This circuit, enclosed in a small plastic box, can be placed into a bag or handbag. A small magnet is placed close to the reed switch and connected to the hand or the clothes of the person carrying the bag by means of a tiny cord. If the bag is snatched....
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With this circuit you can make the amplifier volume control without having to use a potentiometer, but using a circuit with IC DS1669. For working voltage of the IC of this type was not 5 volts, but 4. 5 VOLTS to 8 Volt, but used in this circuit at 5 V....
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Amplifier with digital volume control can we make predictably because the circuit is made simple with just single chip TDA8551. The series of Mini amplifier With digital Volume Control is a type BTL amplifier with 1 Watt. Techniques for adjusting the volume....
-
The MK-319 is a fixed cardioid-pattern, large-diaphragm condenser microphone. The capsule assembly is the same as the MK-219; the primary differences between the models are: The diaphragm is gold sputtered teflon, mounted to a center-terminated capsule....
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Here is simple LED-power audio amplifier ambit with MOSFET amplifier TL071C and 2 may be up to 45 W into 8 ohms. For MOSFET IRFP240 and IRFP9240 are acclimated assurance with accessory can now be these modification. The arrangement is at the appeal SILICONIX....
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The code I used on the ATtiny85 is now included as tiny50hz example sketch in the Ports library, eh, I mean JeeLib. Here are the main pieces: Nothing fancy, though it took a fair bit of datasheet reading to get all the ADC details set up. This sketch....
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This Bells Ring Generator using MC14106 or 40106 Hex Schmitt Inverter IC generates a dual-tone bells ringing similar to most door-bell units....
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The TPA3007D1 is a 6. 5-W mono bridge-tied load (BTL) class-D Audio Power Amplifier with high efficiency, eliminating the need for heat sinks. The TPA3007D1 CAN drive 8- speakers with only a ferrite bead Filter required to reduce EMI The gain of the....
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An AM receiver relies upon the original carrier signal (station frequency) having been amplitude modulated. This means the original amplitude (strength) varies at an audio rate. Looking at figure 1 we can see an unmodulated carrier signal as it might be seen....
-
This is an excellent Hi-Fi Stereo PLL FM Transmitter, the audio source can be the computer, sound card, game consoles, CD, DVD, MP3, stereo mixer for stereo audio signal modulated emission transmission, the board also contains two mic amplifier, with the....
-
This little circuit is invaluable for quick go/no-go testing of just about any remote control transmitting infra-red (IR) light. The tester is battery-powered, built from just a handful of commonly available and inexpensive parts, and fits in a compact....
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This benchpower supplyfeatures three solid-state DC power supplies. The first supply gives a 1. 5 to 15 volts at 1 ampere. The second supply gives a -1. 5 to -15 volts at 1 ampere. The third has a fixed 5V at 3 amperes. All DC supplies are fully regulated. A....
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The electrical circuit diagram of this temperature control circuit consists 3-pin analog temperature sensor (LM35DZ), a built-in A/D converter microcontroller (PIC16F877), and the heater driver (IRL1004)..
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The following schematic diagram shown a conventional which is modified to become a VCO (voltage-controlled oscillator) circuit. By replacing the conventional fixed capacitor with a variable capacitance diode (varactor), we can turn a 74S124 multivibrator....
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A simple burglar alarm circuit diagram and schematic. This can be used as anti theft alarm by attaching the burglar alarm circuit to window foil....
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This low noise microphone amplifier is build with MAT02 produced by PMI. This mic amplifier is very performant and has a verylow noise level. The amplification can be 20dB or 23. 5dB (10x or 15x ) selected by S1. We aim to transmit more information by....
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By taking advantage of certain characteristics of superhet action not normally used, it is possible with one pair of coils to cover both the 80- and 40-meter ham bands as well as ranges where commercial point-to-point c. w. and shortwave broadcast signals....
-
This is a symmetrical amplification unit circuit, more composed, modified by a construction which was proposed some years ago by Lisley Hood. The most important reason is to get the right transistor FET at differential amplifier at input. In spite of all....
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This project is a 12-bit digital I/O extender using the Microchip PIC18f14k50 microcontroller which connects to an USB host port. The microcontroller is available in through-hole DIP20 and SMD packages, too. NOTE for beginners: PIC18F14k50 is a general....
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Check the following IC`s7400, 7402, 7404, 7408, 7432, 7486. Visual Basic Program is used to show the results on the PC. The Microcontroller AT89S52 receives the IC number from the PC and check the Gates IC with the Truth table and sent back the result to the....
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This circuit diagram is a UM66 based touch sensitive musical bell. The circuit is built around CMOS IC CD4011 and popular melody generator IC UM66. The circuit contains a pair of touch plates. When these are bridged by hand for a moment, the um66 starts....
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This is a high quality RF signal meter based around the Analog Devices AD8313 0. 1 GHz - 2. 5 GHz logarithmic detector IC. It is capable of detecting signals as low as -80 dBm. When combined with 2. 4 GHz or 915 MHz bandpass filters, it makes a quick visual....
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For my final project, I decided to make a line-follower robot. This micro controller line follower robot is designed to be able to follow a black line on the ground....
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This diy sound activated lights circuit turns a lamp ON for a brief length when the canine barks (or a somewhat strong sound) providing an impression that the occupants happen to be alerted. The condenser microphone fitted in a place to watch sound and....
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Automatic dark detector senses darkness. As the light level decreases and LDR meets the maximum threshold resistance, the circuit automatically switches on the LED D1. A light detector senses light. As the light level increases and LDR meets the lowest....
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This is a integrated electronic mailbox circuit diagram, A front door open.And when people open. When the cabinet photo detector attached to the light, it will ....
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This low-cost short-wave transmitter is tunable from 10 to 15 MHz with the help of ½J gang condenser VC1, which determines the carrier frequency of the transmitter in conjunction with inductor L1. The frequency trimming can be done with VC2. The carrier is....
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This led lamp circuit can be used as a mini led flashlight. Together with a 1.2 V rechargeable battery, all the components fit into a small enclosure. This....
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The unijunction transistor (UJT) is made of a bar of N type material with a P type junction (the emitter) near the centre. Base 1 is connected to zero volts and base 2 to the positive supply. The resistance between the two bases (the INTERBASE RESISTANCE) is....
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This circuit 5 Channels 2 Octave Graphic Equaliser,easy to make equalizer, because using IC LA3600 (easy to use) For you who take an interest sound of music....
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The following circuit shows the Bedside Lamp Timer Circuit With CD4060 IC. 30 minutes operation, Blinking LED signals 6 last minutes before ....
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LM358 consist of two independent, high gain operational amplifier in one package. Important feature of this IC is we do not require independent power supply for working of each comparator for wide range of power supply. LM358 can be used as transducer....
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Here is a White LED Lamp that turns on when the telephone rings. The cool white light helps to locate the phone in darkness and also helps to note the mess....
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With the increase of the modern electrical equipment kind for vehicle, the increase of the power level, there are more and more patterns of power needed, including AC supply and direct current power supply. The power needs to adopt the switch converter the....
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The power line fluctuations and cut-offs cause damages to electrical appliances connected to the line. It is more serious in the case of domestic appliances like fridge and air conditioners. If a fridge is operated on low voltage, excessive current flows....
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This is a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes. 12 LEDs can be arranged in a circle to represent the 12 hours of a clock face and an additional 12 LEDs can be arranged in an outer circle to indicate 5....
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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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A simple light to frequency converter circuit with diagram and schematic.Used as Light intensity measurement circuit.Design using TLC555, a cmos version of NE 555 timer IC....
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Manufacturers of cordless drills generally recommend a battery charging time of three hours. Once the charging time is up the battery must be disconnected from the charger: if you forget to do this there is a danger of overcharging the battery. This circuit,....
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The hardware is just an Arduino board connected via USB to a laptop. The Arduino appears as a serial device to the computer. On the Arduino board, three LEDs (red, green, blue) are mounted directly to the Arduino board using a prototyping shield like this....
Using the LM2876 audio power amplifier circuit can be designed a very simple high efficiency power audio amplifier capable of delivering 40W of continuous average power to an 8 © load with 0. 1% THD+N from 20Hz 20kHz. The LM2876 audio power amplifier circuit....
It doesn`t break if being little even if it crosses the value of the input/output electric current characteristic. It breaks when short-circuiting and doing the extreme thing in the output. It is explained by the following circuit operation but because the....
Argon and krypton (rare gas) ion lasers find applications in many diverse fields including (1) very high performance printing, copying, scanning, typesetting, photoplotting, and image generation; (2) forensic medicine, general and ophthalmic surgery; (3)....
The MOSFET input of the CA3140 makes it ideally suited for use in a high impedance DC voltmeter. Switch S1 is the range selector. The input impedance is limited to 10M by the resistors used in the voltage divider, but this is still a very acceptable value.....
This simple alarm timer circuit is made with 4060 which has an integrated oscillator with a good stability with a relatively wide frequency range. In the c....
A term used when referring to a robotic control concept, developed by Rodney Brooks, which is strongly associated with Behavior-based robotics, a branch of robotics research that incorporates modular Behavior Based AI Whereas traditional Artificial....
A Transistor is an electronic component which enables a small current to control a much larger current. This feature is very useful in many renewable energy projects and other applications. Click here to read our Introduction to Transistors. Pictured below....
A very popular type of LED that has finally come about is the tri-color, RGB LED. The RGB stands for: red, green and blue since the LED is capable of displ....
Here is the circuit of 20W audio amplifier using LM1875 IC. LM1875 is a very high quality low distortion 20 Watt audio amplifer IC available in TO-220 package. This IC has many built in features like thermal shutdown, current limiter, high gain, high current....
This electronic rf detector electronic project is designed using common transistors and other few common electronic parts. This rf detector responds to RF signals bellow the standard broadcast band to well over 500 MHz and provides an visual, and audible....
Im working to build the CountryHick DI as shown on DIYFactory, with a couple of minor modifications. Eventually, This is going to be a 1u unit with 4....
High Quality very simple unit, No need for a preamplifier Amplifier parts: P1 = 22K R1 = 1K R2 = 4K7 R3 = 100R R4 = 4K7 R5 = 82K R6 = 10R-1/2W R7 = 22R R8....
These netbooks use ALC5632 audio codec plus mixer IC which has quite some amount of knobs and switches. Most of them are available for direct manipulation with alsamixer, GNOME Volume Control and other applications that interact with ALSA mixers. Here ALSA....
You will need an oscilloscope capable of displaying in X/Y mode, and a reference "LO" signal source. In-phase and Quadrature reference square wave signals are generated by a divide by 4, 2 bit ring counter using 2 D type flip - flops. So that I could use an....
A circuit that can be used to flash two Christmas stars alternatively is given here. The IC1 NE 555 is wired as an astable multivibrator here. When there is a positive pulse from the output of IC1, the transistor Q1 conducts and the relay K1 gets activated.....
The Flash MC Experimenting Board I is an ideal platform for all developements in conjunction with the Atmel Flash microcontrollers AT89C1051, AT89C2051 and AT89C4051. It is not only recommendable for starters but also very much recommendable for the advanced....
The following circuit shows about Sound Operated Flip Flop. This circuit based on the LM324 IC. Features: condenser microphone is used for picking ....
The objective of Linkwitz` article was to reduce distorted spatial reproduction when listening to recorded stereo music with headphones-the "super stereo" effect where the music seems to be coming from inside one`s head. To remove the spatial distortion,....
Crystal with small CL(7. 0 pF) makes larger oscillation allowance, smaller current consumption and worse frequency stability, like below table. As the actual board layout and choice of external components influences the best suitable crystal load....
The capacitors C5 give with IC1, The resistor R1, R2 and, capacitors C1, Which build the circuit model astable multi vibrator Square wave generator, at the frequency about 2KHz come out the way pin 3 of IC1. By have capacitors C3, C4 diode D1 and D2. Which....
This is a low cost, antenna-mounted, this UHF TV pre-amplifier circuit can add more than 25db of gain. The first stage of the pre-amplifier is biased from optimum gain. L1, L2 strip line equivalent with Lambda/8 of PC board. An RF power amplifier is a type....
The system described here is a four motor rotary wing aircraft with 3 inch propellers. The overall size of version one is about four inches. A 418MHz digital radio is used for communications and control and an onboard PIC17 microcontroller and L293DD mosfet....
The musical signal`s form does never resemble a square wave. The frequency range perceived by an average adult hardly goes above 17KHz. Hence I do not give a dime to those heated discussions whether it`s appropriate to test audio amplifiers using a 100KHz....
The meter has only one scale (0. 150) but this also used for 0. 75 and 0. 30. This is such a pain, and all people use a calculator with it. I made a new meter scale for it, with all ranges. This improves the comfort so much New Meter Scale for your L3-3! Due....
One of my student has made a disgraceful robot that used two stepper motors and with a simple IR sensor. Yes, above picture is what I`m talking. Without battery carrying, a little bit torque of the stepper and misalignment of driving shaft, makes it crawling....
4-channel SQ logic decoder. Current drain is 75 mA at 20 volts. Input impedance is 2M, while output impedance is 2K (courtesy GTE Sylvania Incorporated)...
Here is the ambit diagram of an opamp based subwoofer filter. Audio frequencies beneath 200Hz are advised to be in the subwoofer range. So a subwoofer clarify will be about a low canyon clarify with a cut off abundance of 200Hz. The alive of this beeline....
A touch switch for a USB powered desk lamp, and the touch switch isn`t working. The circuit diagram, layout and pictures are below. I used the circuits from the following two websites to design the circuit: the 4th circuit. I`ve joined the output of the....
The National Semiconductor LMV225 is a linear RF power meter IC in an SMD package. It can be used over the frequency range of 450 MHz to 2000 MHz and requires only four external components. The input coupling capacitor isolates the DC voltage of the IC from....
Buffer amplifier is required by a typical pH probe to isolate its 10^6 to 10^9 ohm source resistance from external circuitry. Such an amplifier is shown in the....
This is a simple arduino project for a soil moisture sensor that will light up a LED at a certain moisture level. It uses Arduino Duemilanove microcontroll....
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 conveys a sense that it has intent or agency of its own. The word robot can refer to both physical....
Apart from the obvious usage as a headphone amplifier, the circuit can be used for a range of applications where a wide bandwidth low power amplifier is needed. The circuit is based on an opamp, with its output current boosted by a pair of transistors..
High quality mono audio amplifier circuit. This amplifier is built on the classic symmetrical scheme with output stage operates in class AB and has a pretty good sound, with no complicated setup and scarce components. ..
This is Infrared Remote control transmitter circuit has high performance and can be applied to works with the various infrared receiver circuit. To made easily. And best to save your money. - Then another circuits, is designed to have wider applications. Can....
This is a wide band shortwave SW antenna amplifier. The frequency band is 1 to 30 MHz and a medium gain of 15 dB. The input stage is built with MPF102 and....
Variable-gain amplifiers (VGAs) can be used in may types of systems, such as radio receivers. In this system, the input signal voltage depends on an...
We can bring the inverter CMOS digital IC is CD4049 Hex Inverting Buffer IC, to design the Square wave oscillator generator....
Barrage (noise) jammer for VHF/UHF communications. Based around an old TV tuner with its local oscillator tapped and amplified. The tuner`s voltage tune line is mixed with a sweeping, random noise signal...
The circuit shown in this schematic diagram is a square-wave oscillator circuit. The main component of this oscillator circuit is LP165/365 comparator. As....
This circuit is maintain a constant voltage, the output voltage is adjustable. Serves to reduce the input voltage, and keep the voltage constant. The Q1 2N3904 is the amplifier model. common-emitter. This causes the voltage across the collector`s pin with....
This circuit was developed since a number of visitors of this website requested a timer capable of emitting a beep after one, two, three minutes and so on, for jogging purposes. As shown in the circuit diagram, SW1 is a 1 pole 9 ways Rotary Switch. Setting....
This circuit, enclosed in a small plastic box, can be placed into a bag or handbag. A small magnet is placed close to the reed switch and connected to the hand or the clothes of the person carrying the bag by means of a tiny cord. If the bag is snatched....
With this circuit you can make the amplifier volume control without having to use a potentiometer, but using a circuit with IC DS1669. For working voltage of the IC of this type was not 5 volts, but 4. 5 VOLTS to 8 Volt, but used in this circuit at 5 V....
Amplifier with digital volume control can we make predictably because the circuit is made simple with just single chip TDA8551. The series of Mini amplifier With digital Volume Control is a type BTL amplifier with 1 Watt. Techniques for adjusting the volume....
The MK-319 is a fixed cardioid-pattern, large-diaphragm condenser microphone. The capsule assembly is the same as the MK-219; the primary differences between the models are: The diaphragm is gold sputtered teflon, mounted to a center-terminated capsule....
Here is simple LED-power audio amplifier ambit with MOSFET amplifier TL071C and 2 may be up to 45 W into 8 ohms. For MOSFET IRFP240 and IRFP9240 are acclimated assurance with accessory can now be these modification. The arrangement is at the appeal SILICONIX....
The code I used on the ATtiny85 is now included as tiny50hz example sketch in the Ports library, eh, I mean JeeLib. Here are the main pieces: Nothing fancy, though it took a fair bit of datasheet reading to get all the ADC details set up. This sketch....
This Bells Ring Generator using MC14106 or 40106 Hex Schmitt Inverter IC generates a dual-tone bells ringing similar to most door-bell units....
The TPA3007D1 is a 6. 5-W mono bridge-tied load (BTL) class-D Audio Power Amplifier with high efficiency, eliminating the need for heat sinks. The TPA3007D1 CAN drive 8- speakers with only a ferrite bead Filter required to reduce EMI The gain of the....
An AM receiver relies upon the original carrier signal (station frequency) having been amplitude modulated. This means the original amplitude (strength) varies at an audio rate. Looking at figure 1 we can see an unmodulated carrier signal as it might be seen....
This is an excellent Hi-Fi Stereo PLL FM Transmitter, the audio source can be the computer, sound card, game consoles, CD, DVD, MP3, stereo mixer for stereo audio signal modulated emission transmission, the board also contains two mic amplifier, with the....
This little circuit is invaluable for quick go/no-go testing of just about any remote control transmitting infra-red (IR) light. The tester is battery-powered, built from just a handful of commonly available and inexpensive parts, and fits in a compact....
This benchpower supplyfeatures three solid-state DC power supplies. The first supply gives a 1. 5 to 15 volts at 1 ampere. The second supply gives a -1. 5 to -15 volts at 1 ampere. The third has a fixed 5V at 3 amperes. All DC supplies are fully regulated. A....
The electrical circuit diagram of this temperature control circuit consists 3-pin analog temperature sensor (LM35DZ), a built-in A/D converter microcontroller (PIC16F877), and the heater driver (IRL1004)..
The following schematic diagram shown a conventional which is modified to become a VCO (voltage-controlled oscillator) circuit. By replacing the conventional fixed capacitor with a variable capacitance diode (varactor), we can turn a 74S124 multivibrator....
A simple burglar alarm circuit diagram and schematic. This can be used as anti theft alarm by attaching the burglar alarm circuit to window foil....
This low noise microphone amplifier is build with MAT02 produced by PMI. This mic amplifier is very performant and has a verylow noise level. The amplification can be 20dB or 23. 5dB (10x or 15x ) selected by S1. We aim to transmit more information by....
By taking advantage of certain characteristics of superhet action not normally used, it is possible with one pair of coils to cover both the 80- and 40-meter ham bands as well as ranges where commercial point-to-point c. w. and shortwave broadcast signals....
This is a symmetrical amplification unit circuit, more composed, modified by a construction which was proposed some years ago by Lisley Hood. The most important reason is to get the right transistor FET at differential amplifier at input. In spite of all....
This project is a 12-bit digital I/O extender using the Microchip PIC18f14k50 microcontroller which connects to an USB host port. The microcontroller is available in through-hole DIP20 and SMD packages, too. NOTE for beginners: PIC18F14k50 is a general....
Check the following IC`s7400, 7402, 7404, 7408, 7432, 7486. Visual Basic Program is used to show the results on the PC. The Microcontroller AT89S52 receives the IC number from the PC and check the Gates IC with the Truth table and sent back the result to the....
This circuit diagram is a UM66 based touch sensitive musical bell. The circuit is built around CMOS IC CD4011 and popular melody generator IC UM66. The circuit contains a pair of touch plates. When these are bridged by hand for a moment, the um66 starts....
This is a high quality RF signal meter based around the Analog Devices AD8313 0. 1 GHz - 2. 5 GHz logarithmic detector IC. It is capable of detecting signals as low as -80 dBm. When combined with 2. 4 GHz or 915 MHz bandpass filters, it makes a quick visual....
For my final project, I decided to make a line-follower robot. This micro controller line follower robot is designed to be able to follow a black line on the ground....
This diy sound activated lights circuit turns a lamp ON for a brief length when the canine barks (or a somewhat strong sound) providing an impression that the occupants happen to be alerted. The condenser microphone fitted in a place to watch sound and....
Automatic dark detector senses darkness. As the light level decreases and LDR meets the maximum threshold resistance, the circuit automatically switches on the LED D1. A light detector senses light. As the light level increases and LDR meets the lowest....
This is a integrated electronic mailbox circuit diagram, A front door open.And when people open. When the cabinet photo detector attached to the light, it will ....
This low-cost short-wave transmitter is tunable from 10 to 15 MHz with the help of ½J gang condenser VC1, which determines the carrier frequency of the transmitter in conjunction with inductor L1. The frequency trimming can be done with VC2. The carrier is....
This led lamp circuit can be used as a mini led flashlight. Together with a 1.2 V rechargeable battery, all the components fit into a small enclosure. This....
The unijunction transistor (UJT) is made of a bar of N type material with a P type junction (the emitter) near the centre. Base 1 is connected to zero volts and base 2 to the positive supply. The resistance between the two bases (the INTERBASE RESISTANCE) is....
This circuit 5 Channels 2 Octave Graphic Equaliser,easy to make equalizer, because using IC LA3600 (easy to use) For you who take an interest sound of music....
The following circuit shows the Bedside Lamp Timer Circuit With CD4060 IC. 30 minutes operation, Blinking LED signals 6 last minutes before ....
LM358 consist of two independent, high gain operational amplifier in one package. Important feature of this IC is we do not require independent power supply for working of each comparator for wide range of power supply. LM358 can be used as transducer....
Here is a White LED Lamp that turns on when the telephone rings. The cool white light helps to locate the phone in darkness and also helps to note the mess....
With the increase of the modern electrical equipment kind for vehicle, the increase of the power level, there are more and more patterns of power needed, including AC supply and direct current power supply. The power needs to adopt the switch converter the....
The power line fluctuations and cut-offs cause damages to electrical appliances connected to the line. It is more serious in the case of domestic appliances like fridge and air conditioners. If a fridge is operated on low voltage, excessive current flows....
This is a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes. 12 LEDs can be arranged in a circle to represent the 12 hours of a clock face and an additional 12 LEDs can be arranged in an outer circle to indicate 5....
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....
A simple light to frequency converter circuit with diagram and schematic.Used as Light intensity measurement circuit.Design using TLC555, a cmos version of NE 555 timer IC....
Manufacturers of cordless drills generally recommend a battery charging time of three hours. Once the charging time is up the battery must be disconnected from the charger: if you forget to do this there is a danger of overcharging the battery. This circuit,....
The hardware is just an Arduino board connected via USB to a laptop. The Arduino appears as a serial device to the computer. On the Arduino board, three LEDs (red, green, blue) are mounted directly to the Arduino board using a prototyping shield like this....
