Top Circuits Page 110
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Simulation of behavioral DSP designs along with analog/RF circuit designs is critical to the success of the integrated components, devices, and subsystems used in today`s wireless applications. The need to verify the impact of real-world analog/RF issues on....
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The input and output data streams of the I and Q data channels are shown in Pi/4DQPSK System: fc=990 MHz, Data rate = 48. 6 kbits/sec. Note the delay between the input and output data signals. This delay is due to the filters in the modulator and....
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GMSK_Demod is a model of a suboptimal (an optimal receiver would require the Viterbi algorithm) coherent GMSK demodulator (refer to the GMSK_Recovery component). Noncoherent demodulation can be performed with the FM_Demod component. Pin 1 is the input for....
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Murata Manufacturing Measurement-Based GRH Capacitors Equivalent Circuit Model Schematic Design shows the equivalent circuit model schematic design of the muRata Manufacturing Measurement-based GRH series SMT capacitors that is based on device measurements....
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It`s based on an LM2917 and an SCR, which has the very nice side effect of being impossible to generate any mis-timed sparks, a highly desirable attribute for high output rotary engines. When the limit is reached by accelerating to the rev limit, the....
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In this tutorial, I will show you how to write a very simple program. I am assuming that you have written ladder logic before, and that you have some basic familiarity with microcontrollers, but that you have never used LDmicro. If you don`t know very much....
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555 Timers are very fun to encounter and experiment with. They can be used as a timer and can be set to a certain frequency. In Part II of Electronic Project I, we created a circuit that would get an LED to flash. This time we are going to add a speaker so....
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Its a simple fly back tester, I believe you can built it, i use this circuit to test all of high freq transformer like SMPS transformer or fly back, this circuit is an astable multivibrator with about 90Khz freq, 12 vdc as vcc. To check SMPS transformer or....
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I have a Power Factor Correction board that was taken from an old Sun Microsystem Spark450 power supply p/n 300-1359-xx. It has everything I need for a 650 watt inverter. The entire PFC circuit is not detailed in this image. The only part of the circuit I....
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I am a mechanical engineering student, and for a part of my design project I wish to use a timer as so the motor switches off about 40-50 seconds after activation. The 555 timer chip is a rectangle with a indented o on the top, i assumed this was equivalent....
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What color LED it makes a difference. One LED or how many 3mm 5mm What is you power source These are vital things to answer. More info required. It does not compute! There`s them that knows and them that just thinks they know, whitch are you Stir the pot and....
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Here is a simple circuit diagram I think will work for the charger. I already have the transformer, two SCRs, maybe the capacitor, heat sink, and a case to mount it all in. If you go for lead- acid batteries and forget the SCR`s, or put them in a circuits....
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I wish to control a DC motor speed for a 6 volt brush motor through a linear pot and also have that speed oscillate (throb) with the oscillation frequency controlled by a linear pot to have a complete cycle peak to peak of around 1 to 5 seconds. you can see....
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First of all, download any version of arduino software ( new version is better) using the link given above and then download the provided arduino sketches. Once download is complete, open the sketches and you will be able to see the written codes. Complete....
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The idea is to create a system that allows the residents to play a movement based game similar to laser tag. Using GPS and a digital compass we track their localized movements and position vector. That information is used when the player wants to fire` upon....
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I created a simple game console that could play Pong and other games with Atari 2600 joysticks, which the Arduino would read the joystick inputs and output the data to a TV with a TVout library. I created this project just for the fact that I wanted to....
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The purpose was to create an octave and have the ability to play it when a crocodile paddle was pressed. I made this device because I like music and I thought the ability to control the sound with your feet would be cool. This project is to preform the....
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To compile this software just copy and paste it into any current or newer version of arduio software. To compile to check for error click the play like button and wait for the software to process. If any errors is found, it should indicated at the bottom of....
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When ever I find an easy way to do something I just have to make a record of it. There are some projects where you might want to do something wireless with the Logochip. This little circuit makes it pretty easy. First an explination of the Radioshack....
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There is something to be said for the processes of reducing a set of objects or functions down to their lowest common denominator but I think what has really driven me to do this is I am too cheap to go out and buy an Arduino Decemila every time I want to....
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This is designed to work with a varity of stepper motors, 5 or 6 wire unipolar types. Its also made to operate from about 9 volts to up to about 24 volts. Below is a bread board layout of the circuit but I can offer a PC board layout for those of you who....
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Now, to perform LED blinking in varying speed, we are sure, that we need to somehow change the delay time of an LED to remain in ON and OFF stat. So the main funda is to change the argument to function delay with change in time that`s it. Here, first we....
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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 project is based on the parametric equalizer proposed by Elektor in the late 80s or early 90s and later published in the book "Creations electroniques" in 1993 (Publisher: Publitronic). Their design involved three stereo potentiometers per channel,....
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Did it ever occur to you that an array of white LEDs can be used as a small lamp for the living room If not, read on. LED lamps are available ready-made, look exactly the same as standard halogen lamps and can be fitted in a standard 230-V light fitting. We....
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As they did with the monotron synthesizer, Korg has quietly released schematics for its the analog drum synthesis portion of its monotribe synth and step-sequencing rhythm machine. You just see the bits that make the drum sounds, but that`s the interesting....
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An HD44780 Character LCD is a liquid crystal display (LCD) display device designed for interfacing with embedded systems. These screens come in a variety of configurations including 8x1, which is one row of eight characters, 16x2, and 20x4. The most commonly....
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If you are looking to learn how to make your own USB device, this tutorial is perfect to start. Here you will see how to breadboard a simple USB generic HID device, creating the PIC18F firmware and finally creating the Windows interface for the device which....
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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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An introductory post on how to use serial communication in PIC Micrcontrollers to send data to PC. What comes first in your mind when you listen serial communication ? Yes, how to send data in series. All this time you have been working single bits, turning....
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This allows a TSCM specialist the ability to "blink" a Spectronics bugging device on for a second or two to detect it, and then to shut it back down before the eavesdropper catches on to the fact that his bugging device has just been caught. There is a small....
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My original BFO, a small EICO 330 solid state signal generator, served well to bring in a variety of distant LW beacons. In late-2004/early-2005, a new One-Active Device (1-AD) contest to complement the Crystal Set DX contest was announced. Steve McDonald....
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You "see" colors, geometry, distance, spatial continuity and discontinuity, motion, connectedness and adjacency. These notions are built into the ways in which you experience and think about the world. You interpret the information returned to your senses....
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Create a new project by selecting the New Project option from the Getting Started menu or by selecting Select File > New Project. This brings up a Dialog box where you can enter the desired project name and location. Choose a meaningful name. You can also....
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I would like you to generate a diagram showing all the hardware parts you will be using for your project, and how they are connected to each other. This diagram should clearly show the Arduino board as a box with lines going in and out of it, with arrows....
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In this lab we will be using flip-flops. Xilinx offers a large library of sequential circuits. Make sure to check it out when searching for circuits: Xilinx Refernce Library. The circuit we want to implement in this lab is a sequential circuit controlling 3....
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Model Railroader is the world`s largest magazine on model trains and model railroad layouts. We feature beginner and advanced help on all model railroading scales, including layout track plans, model railroad product reviews, model train news, and model....
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On this page we will discuss the power electronics needed for our EDM machine. The basic mechanism of electrical discharge machining is a controlled spark between the electrode and the workpiece. This part of the electronic design generates the waveforms....
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Electromagnetic radiation is used in communication. You are more familiar with radiowaves, microwaves, and TV signals. Visible light is also electromagnetic radiation and can be used to transmit a signal. It is a whole new technology called fiber optics. A....
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Since you will be required to use buses and registers in lab 4, we will make a macro for a register that uses a 4bit bus for the data input and a 4-bit bus for the data output. You will need to make a similar macro for all your components that uses buses, so....
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We present a simple and high-throughput microfluidic system for diffusion-based monolayer yeast cell culture monitoring. The technique takes advantage of gas solubility and elasticity of PDMS. Yeast cells are patterned into the micro-cavity array with a....
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Bicycle sensors provide two main purposes: to record the motion of the bicycle in order to assist with collision reconstruction, and to relay signals to the bicycle controls to keep the bicycle on course. This will pose several component requirements, as the....
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This is an ongoing project I`m working on which started as a circuit that I decided was necessary to be able to neatly interface the nNovia QC120 A2D2recorder to a Sony DXC-325P camera with CA-325P studio back. I`m still working on the final design. I have....
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This page documents an older version of the project that proved very unreliable. This is (still) an ongoing project when I get free time, so I post periodic updates here until I get a proper design/rig and eventually create a new page for it (with pictures....
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I get a lot of questions about wiring motorcycles. Sometimes people are just trying to fix their blinkers and aren`t familiar with how motorcycle electrics work but more often than not I get requests about trimming down electronics for custom riders. An....
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A front-end circuit has been developed for the D0 upgrade for reading out visible light photon counters (VLPC`s) associated with the fiber tracker and the preshower detectors. This custom chip, called SIFT, will be used to collect low-level charge signals....
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SO HERE YOU CAN SEE THAT USING ENCODER 4-BIT DATA ISGENERATED AND THIS DATA WILL MODULATED USING RFMODULATE AND TRANSMITTED. ANOTHER SIDE RECEIVER RECEIVES SIGNAL AND DEMODULATE THAN DECODER DECODES THE SIGNAL AND 4-BIT DATA ISAVAILABLE. HERE IS THE PIN....
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On the breadboard, build two bi-directional motor control circuits (also known as "H-bridge") circuits. These circuits will control the two DC motors that drive the wheels. Each circuit will have two wires from the Arduino (one for forward, one for backward)....
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Here I will post some cool looking, challenging yet extremely fun electronic circuits you can build. I studied Electronics most of my life, since I was in middle school electronics have been my passion and have been creating some circuits since then. Most of....
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A parametric equalizer on an audio-mixer-sized PCB...
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The Lifetime Drive, later renamed the Universal Drive after issues regarding implied warranties, was produced by Miles Gordon Technology (MGT) in April 1989 as a floppy drive capable of connecting to most popular machines at the time. MGT was run by Alan....
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Flame Feedback is a sound sculpture built from a speaker driver, a candle, and electronics. The speaker is driven with a low frequency tone, pushing air and causing the candle to flicker. An optical sensor measures the candle flicker and frequency modulates....
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This is an old version, see the latest version on the documentation wiki. Now you`ve got one of Hack a Day`s Bus Pirates, what do you do with it? Learn about 1-wire, I2C, and SPI EEPROMs with the 3EEPROM explorer board (we pronounce it THREE-PROM, emphasis....
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Openbench Logic Sniffer is an open source logic analyzer. It`s designed to support the SUMP logic analyzer software at the lowest possible cost. Download the source and design files from the Gadget Factory project page. This project started in the comments....
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The Philadelphia, PA based Maker/hacker group Hive76 developed a tiny serial terminal using a TI Launchpad and an HD44780 LCD. The circuit diagram and code libraries are available for download. Some useful work that can be incorporated into larger projects.....
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Vasilis Stergiopoulos has built a RJ45 LAN cable tester. The circuit was originally designed to use a 555 and 4017 IC, but Vasilis has published the schematic and source code in assembly for using the Attiny2313 instead. The Attiny2313 produces successive....
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Yesterday we covered the Dangerous DSO analog front end. This circuit divides our +/-10volt input to +/-0.5volts, and re-centers it between the 2volt and 3volt range the ADC can measure. Today we`ll simulate the circuit to get a better feel for how it works.....
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Markus built a software AM radio transmitter using the Arduino. The audio signal is fed to the ADC input through a decoupling capacitor. A PWM output pin directly drives a capacitor inductor circuit with an antenna. The schematic and firmware are available...
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Electronics-DIY has instructions on how to build a simple portable FM transmitter that would allow your iPod to broadcast music over radio waves. It is simple to build and fits into a mouse case. It works quite easy, there is a power switch on the bottom to....
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If you ever wondered how those phone bugs from spy movies work, here is the schematic for your very own. This simple FM transmitter uses a phone line to both power the device and receive the audio signal. Just hook it up to the phone line you want to monitor....
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We wrote about a phone bug in a previous post. Here`s an app note about a circuit for detecting and locating radio frequency transmitters. This design idea showcases a circuit that detects RF ""bugs,"" such as hidden wireless cameras, eavesdropping....
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This simple circuit that converts a 5V PWM signal into a variable precision reference voltage with a rang of -2.5V to +2.5V. Many designs, like a digitally controlled power supply, programmable dummy load, etc, require a Digital to Analog Converter to supply....
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Dilshan designed a RAM memory extender for PIC microcontrollers. The circuit uses some logic ICs and SRAM memory modules to extend the data memory of a PIC. The designer provided source code for this project written for the MikroC compiler. With this given....
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Like so many others, we found a nice 1.8"" TFT display in China, and we decided to make a breakout for it. Instead of just breaking out the pins, and perhaps adding the micro SD card holder, we equipped our version with an USB enabled microcontroller and a....
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Openbench Logic Sniffer is an open source logic analyzer. It`s designed to support the SUMP logic analyzer software at the lowest possible cost. Download the source and design files from the Gadget Factory project page. This project started in the comments....
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Use a remote control with your computer, view infrared signals on a logic analyzer, or capture and replay remote control buttons. USB Infrared Toy v2 has an improved IR transmitter and several new features. There`s lots of interesting infrared projects on....
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Using a PIC12F675, up to 5 outputs can be switched sequentially using a standard Remote Control pulse input of between 1 to 2 ms. Although any RC channel input can be used, it is especially useful when used with the rotary knob channels (usually 5 and above....
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In previous article about the Atmel AVR We have only blinked with LEDs, without influence of events outside the microprocessor. All ports operated only as outputs, there was no input. Now we will show how to connect control buttons to the microcontroller and....
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This is probably the simplest possible digital voltmeter with Atmel AVR microcontroller and LCD display. The circuit is controlled by a microprocessor IO1 - AVR Atmel ATmega16A, ATmega16L, ATmega16, ATmega32A, ATmega32L or ATmega32. Below is a program to....
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This is a very simple digital thermometer with an Atmel AVR microprocessor, measuring the temperature in range of 2 to 99 °C (degree Celsius) with a resolution of 1 °C. The circuit is controlled by a microprocessor IO1 - Atmel AVR ATmega8, ATmega8L or....
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This is a simple digital counter of pulses with 7-segment LED displays. There may be any number of digits. I have chosen decimal counters 4026 (MH4026, HCF4026, CD4026, etc. ). Their advantage is that you don`t need binary decoders from BCD to 7-segment....
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Simple digital frequency meter has many applications. It may be an experiment for beginners, laboratory equipment or a meter built into some device. Ideal wherever there is a need to measure and digitally display the frequency. Circuit The frequency meter is....
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Electronic thermometer has countless applications. Not everywhere can we use the standard mercury thermometer, for example, due to its size, frailty or the need to measure from the distance. The advantage of electronic thermometers are also small size and....
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The inverter is suitable for battery powering of mains appliances. It is a switching converter, which contains no bulky, heavy and expensive iron transformer. The advantage of small size and weight, precise output voltage stabilization and among other....
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Anyone who frequently builds, repairs and tests equipment powered by mains voltage, will certainly have met with an unpleasant surprise when the plug inserted into the socket (or later) - loud explosion, destruction of equipment, flying pieces of components,....
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Sometimes you need a low voltage power supply of very high currents (hundreds of amperes) - whether for spot welding, heating or melting metals, starting the vehicle engine, or other physical experiments. Such a supply I have now decided to build. Given that....
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This dimmer is used to adjust the brightness of incadescent bulbs (dimming) from zero to maximum. Regulation from zero is achieved using double delay circuit. The circuit is two-terminal connected and so it can be installed into switch box without modifying....
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Introduction: It is not any real perpetuum mobile, source of free energy from the atmosphere or anything like that, but it is, especially for beginners and enthusiasts of alternative energy sources, an unusual and very interesting experiment :). This device....
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Now we bring you two versions of a homemade digital thermometer with ICL7106 that I recently built. One version uses a LED display, the second version LCD display. In both versions, is used silicon transistor as a temperature sensor. The temperature is....
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Triac regulation suited to regulate the power of mains appliances. It can regulate the brightness of incadescent light bulbs, halogen, dimmable energy savers, the power of heaters and other thermal appliances, engine (motor) regulation, etc. Fits as well to....
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VTTC (Vacuum tube tesla coil) is a Tesla coil with vacuum tubes as a switch. I used self-oscillating circuit with two russian (soviet) tubes GU-81M connected in parallel. The source of high voltage are two MOTs (Microwave oven transformers) connected in....
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It`s one of the simplest circuits to get working but one of the more tricky to understand. This simple two-transistor oscillator has a technical name of astable multivibrator and provides a squarewave (of sorts) output in and out of phase. First up, keep....
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Datagoo is built around the ATMEGA328P, the same processor used by many hobbyists for a variety of Arduino designs. When coupled with an FTDI FT232RL USB-Serial circuit, the board can be programmed with any computer with a USB port. Other design decisions....
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An output booster is needed when you want to achieve the needed current/voltage gain. Great output commonly need in accociation with the the output power limitation of mostly IC processing. The following figure shows you circuit diagram of the typical....
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The following schematic shows 12 W Bridge Amplifier circuit diagram as an application of the TDA2007A a class AB dual audio power amplifier which is designed for stereo application in music centers, TV receivers and portable radios. According to the....
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In order to keep the speed of the motor constant when loads are applied, a control application circuit is needed to apply the purpose. The H-Bridge circuit may control the speed and direction of the motor. The below diagram shows H-Bridge with 4 inputs and....
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find sections such LM5020 Connection Diagram and pin descriptions, the functional block diagram of the device, line Under Voltage Lock Out (UVLO) circuit, an internal high gain error amplifier, a cycle-by-cycle over current protection function, sets the....
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Dans ce site, vous pouvez trouver des contributions dans des domaines qui m`intG©ressent particuliG¨rement. D`ailleurs, vous pouvez me suivre sur Twitter: @davbucci. Le site est composG© par des contributions plutG t hG©tG©rogG¨nes. Vous pouvez y accG©der en....
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Picture three or four small engines occupying the same loop of track and keeping a safe distance as they go round and round. I am sure that many of us have tried this with radio controlled engines but it can be a constant battle to keep them apart especially....
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At the time I saw this there were a couple of units on the market. Non of which interested me because it locked you into a specific phone, or required the phone to be permanently mounted on the bike. The Kennedy (at about $79. 00) was supposed to be....
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Construction of a 1-Wire Barometer. This page shows the circuit, and gives construction and calibration details. This barometer connects to a Dallas Semiconductor 1-Wire network...
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circuit multiprogs 1 BOS tx con 0 `pin serial to BOS processor 0 BOSrx con 1 `pin serial from BOS processor 4 epower con 2 `pin high turns on power to electronics 2 BOShalt con 3 `pin high halts current BOS move 3 BOSbusy var in4 `pin BOS processor busy =>....
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The head will be powered by servomotors and will be built from sheet plastic, metal or plywood. The template which can be used for cutting sheet material can be found at the end of this article. Download the template, compare the size of the printed....