New Circuits Page 93
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This circuit uses a Cmos 4017. The 4017 is a decade counter. The count starts at zero. And it advances by one - each time pin 14 is taken high. When the count reaches nine - it goes back to zero - and starts all over again. = As the count progresses - each....
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Emitter voltage completely drops to 0V from 42V during the pulse (transistor conducting or transistor saturated). That in contrary with the pure resistive load (the 4. 7 Ohm resistor in the last video), where the Collector - Emitter voltage NOT completely....
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Build a device to determine the depth of the flocculent layer in a lake. The flocculent layer is a mud layer that has a similar consistency of water. It is pretty difficult to determine its depth accurately from the surface. I have a paper that describes a....
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The circuit diagram shown below appears one wire vaccum control of pneumatic locking which is popular with Jaguar, Audi and Mercedes Pneumatic..
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Hbrightness metal halide lamps typically have an efficacy of greater than 100 lumens/watt and have a lifetime of 20,000 hours. HID lamps produce light using a technique similar to that used in fluorescent lamps where mercury atoms are excited by an....
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When the voltage on the non-inverting input of each comparator exceeds the voltage at its inverting input, the output switches high and illuminates the relevant LED. NOR gate latches are connected to the outputs of the third and fourth comparators. When the....
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The idea for the project started nearly two years ago, while I was researching the purchase of a new lighting board for a small theatre where I was working at the time. While our old board was nearly twenty years old, and desperately in need of a....
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A relaxation oscillator is used to flash an LED in the base circuit. C1 is charged slowly through R1 by the power source, then discharged periodically through R3 and the LED by the UJT. Flashing rate is determined by the supply voltage and by R1-C1`s time....
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Amplifiers which run from 12V DC generally don t put out much power and they are usually not hifi as well. But this little stereo amplifier ticks the powe....
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The Comtech has become the de facto standard now for those entering the Amateur TV scene. Sadly the production may be coming to an end with the lower demand for analog tuners and the ICs used becoming obsolete. With the demise of the G1MFG website there is....
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The oscillator circuits presented on this page are from expired or non-maintained U. S. Patents. All circuits are presented in "Electronic Workbench 5. 12" or "Multisim 7 circuit simulation formats". A note on spice simulation of electronic oscillator....
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Microcontrollers (MCUs) are fantastic little ICs that give an extra element of versatility to your electronics, robotics or other project. But they`re....
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This part of my site features construction details of a transistor VHF radio I managed to build using circuits as the building blocks, Compiled from some of my old radio magazines and books. Although this site is titled as a valve radio site I have decided....
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Of particular interest to us are 12 Volt DC powered PIR sensors and associated circuits since these can be powered directly from a 12 Volt battery which is in turn charged by wind, solar, or other renewable energy sources. In this article we will look at the....
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This is the built servo amplifier and circuit diagram. This is a simple and ordinary op-amp circuit, there is nothing difficult. However it has power amplifier and small signal amplifier on the board together. You have to pay attention to unintentional....
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Audio test oscillator audio test oscillator circuit, This generally results in a square wave if the frequency of oscillation is low enough relative to the amplifier`s bandwidth Crystal Controlled Oscillator schematic of a low frequency sine wave oscillator....
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Circuit schematic of the UDC containing only dispersive components. The two low-frequency series LC resonators (with LA=LB and CA=CB) are fed by two input semi-infinite transmission lines, A and B, and parametrically coupled to a third high-frequency series....
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Telephone Headgear. Acompact, inexpensive and low component count telecom head- set can be constructed using two readily available transistors and a few other electronic...
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One of the most useful gadgets a video enthusiast can have is a low-power TV Transmitter. Such a device can transmit a signal from a VCR to any TV in a home or backyard. Imagine the convenience of being able to sit by the pool watching your favorite movie on....
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In the daily life and production, a lot of occasions such as car roll back, robot avoid hindering, industrial well logging, liquid level measurement of the reservoir etc. to need to carry on the range finding of non-contact automatically. Supersonic wave....
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The interface circuit is added between computer standard video signal output terminal and TV. It can enlarge standard 1V(Peak - peak) video signal am to 3V(Peak - peak). Negative feedback circuit is composed of T1 and T2. It has a wide frequency range. The....
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When a vehicle is driven on the highway at night, it is required that light beam should be of high density and should illuminate the road at a distance suf....
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A zero-crossing detector would convert an input sine wave (Vin) to a square wave, which when high would charge an op-amp integrator. Subsequently, a reference-input square wave would discharge the integrator. The integrator output voltage at the conclusion....
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This transmitter uses a 5089 DTMF generator chip and a keypad to generate DTMF signals and modulate them on an IR light beam from an IR LED. Xtal is a 3.579-MHz TV burst crystal....
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Light onphototransistorQ1 (Radio Shack 276-130) produces voltage change across R2 for amplification by opamp whose output drives array fiveLEDs forming bar graph voltage indicator. Adjust R3 initially for highest sensitivity by tuming off room lights and....
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A notch for a narrow frequency band of a few per cent or even less normally requires close-tolerance components. At least, that`s what we thought until we came across a special opamp IC from Maxim. In filters with steep slopes, the component tolerances will....
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This mains AC Relay module uses a 5V relays that can run straight off the Arduino and switch 230V, following the circuit on the arduino website here: relays. pdf I`ve built my own (very simple) evergy monitoring and control system (using Arduino 2009), using....
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A Goodman Janitrol 2. 5 ton Standard Air Handler model #ARUF030-00A-1. After troubleshooting, I discovered that the only way to shut the fan off is by turning off the breaker or disconnecting the black wire that leads from the fan to the circuit board. There....
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This circuit allows you to set a limit on the maximum output current available from your PSU. It`s very useful when you power-up a project for the first time - or carry out a soak-test. By setting an upper limit on the current available from your PSU - you....
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The power supply used here is a capacitive type, thus no transformer is incorporated making the circuit very compact and fixable in any small corner of the particular premise. The use of LEDs in place of a filament bulb makes the application very....
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This second issue of the Bikelab Notes, published during my time building BEHEMOTH at Sun Microsystems, focuses on the high-brightness LED taillight assemblies. These were not commercially available at the time, so this was a hack. I also commented on the....
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The following circuit show about Circuit Diagram Of Motor Control Unit. This circuit based on the LM317 IC. Features:diodes protect the regulator, ....
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Simple two transistor TV transmitter circuit that operates from 12V.Compatible with PAL B and PAL G systems....
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This is a schematic diagram of a three-phase pulse generator circuit. This circuit produce 3 phase overlapped output similar with 3 phase AC powerline, you....
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The unit is designed around an ordinary op-amp and easy to obtain parts. Reverse engineered circuit diagram of Anatek 50-1S variable power supply shown below. Circuit board layout does not seem all that critical and as you can see from the schematic that....
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Function Generator Virtual Oscilloscope Sound card based multi-functional design, and virtual function generator Microcontroller based Function Generator Design and Implementation of graduation. The total program function generator Generally refers to the....
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This is the first electronic circuit I designed from scratch, my first time programming a MCU, the first time I wrote an application in assembly language and my second homemade PCB. Usually people starts building very simple things and they increase the....
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The LEDs are active-low (0) while the switches initial state is high (1). In other word, the PC software needs to give low (0) to on the LEDs and if a low (0) is read from the input pins, corresponding switch is pressed. I’m using the prototyping area....
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If you re expecting an important visitor but you just have to step out for a moment, an electronic doorbell memory can come in handy so you can see whether someone rang while you were out. Of course, you can t tell whether it was the visitor you were....
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As the figure 15-24 shows, the controller circuit is composed of the switch type Hall integrated circuit DN838 and the astable multivibrator (composed of the 555), this circuit can be used in wide range of applications such as the automatic door opening,....
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1994 Mercury Topaz Instrument Cluster Illumination Wiring Diagram...
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If you want to make an ultra-multipurpose, generic microcontroller board, then what I`ve covered already is enough. It`s the bare basics that will get....
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Burst Mode operation maintains high efficiency at light loads by reducing IC quiescent current to 120 A. Light load efficiency is also improved with the reverse inductor current inhibit function which supports discontinuous operation. Additional features....
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The following video is of my test circuit of a 16 step analog sequencer based on Mauno Tuominen`s schematic for an analog CMOS sequencer based around at 4067n multiplexer/demultiplexer. You can see a DIY version of the sequencer here at studiomanus. com. I....
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Many audio mixer circuits have been published here. But I think, this one is the simplest of them. This very simple audio mixer circuit uses only one transistor. The base emitter junction of the transistor is biased by the diodes D1 and D2. The signals to be....
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I built my own Lo-fi Arduino Guitar Pedal. I`m even using a similar enclosure work tossed out a couple of thinwire->twisted pair converters that I snapped up. I think the only major deviation is that mine only has one output at present- I could add a second....
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Ni-Cd Ni-MH Adjustable Constant Current Battery Charger Circuit This is a Adjustable Constant Current Ni-MH or Ni-Cd battery charger circuit. It can be used to get a constant current power supply. Here is the schematic diagram of the circu....
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I have a small scroll saw i would like to build a cheap speed controler for It uses an AC motor which appears to be brushless when i dismantled it C....
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This is a low-input impedance conversion circuit with reference resistor RS being connected to the amplifier`s feedback loop and input impedance in approximately zero, and the input current flows into Al`s output end through Rs. The maximum switching current....
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Function of the Two Siren Sound Circuit that is using IC 555. Siren Circuit is separated into three parts: low frequency production. The manufacturing shrill frequency and annex of production low frequency is obtained from IC1 connected to astable multi....
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The two circuits beneath allegorize application the 555 timer to abutting a broadcast for a agreed bulk of time by acute a cursory N/O advance button. The ambit on the larboard can be acclimated for continued time periods area the advance button can be....
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Working on the brightness problem, I know that the 4017 design did not work well because there was no way to turn off the sign while updating the shift registers. As a result I went back to having the Arduino directly drive the TIP120 drivers. Another....
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The series of decibel meter function to determine the level of signal strength that is given to the speaker on the audio system. Decibel meter circuit is often also known as the VU meters on audio hifi system. For a series of decibel meters in this article....
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Except for use as a normal Battery Charger, this circuit is perfect to `constant-charge` a 12-Volt Lead-Acid Battery, like the one in your flight box, and keep it in optimum charged condition. This circuit is not recommended for GEL-TYPE batteries since it....
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In this article, I`ll show you how to build a coil gun. A coil gun is a device that fires magnetic projectiles at high velocities, using electricity. Coil guns require no explosive propellant, therefor can be fired an infinite amount of time, providing that....
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Here`s a PLL FM Transmitter using LMX1601, ATtiny2313 or AT90S2313 microcontrollers. The common characteristic of all of the previous low power FM transmitters I`ve built over the decades, is that their operating frequency is determined by an LC resonant....
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Working principle of the circuitThis medical electric aspirator waterproof controller consists of the power supply circuit, liquid level detection control circuit and alarm circuit, see as figure 9-47. The power supply circuit consists of the switch S1,....
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This is a small battery operated Tracking transmitter which broadcasts a repeating radio signal which can be detected by a directional antenna. The transmitter broadcasts an isotropic (radiates in all directions) signal on the FM band. An ordinary FM radio....
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This circuit is presented as an alternative to the IR beam break detector featured in the June 2009 issue (Silicon Chip). In order to make it relatively insensitive to ambient light, it uses a standard IR receiver IC such as the Jaycar ZD-1942. This has a....
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The following diagram is the circuit diagram of 20 band stereo graphic equaliser which will controlling the audio signal in specific frequency range. This circuit must be connected before the amplifier circuit. For maximum performance, you may use high....
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The goal of this project was to create a multi-effect guitar processor. This device will be capable of changing the tonal qualities of the guitar. Through these changes in tone it is possible to give the guitar a very wide array of unique sounds. This....
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This is an 250mW RF power amplifier project. This circuit is designed to amplify the output of about 7mW wide band FM transmitters to a final level of about 250mW. This electronic circuit is a simple 2-transistor VHF power amplifier, with about 16dB gain,....
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By using diodes in place of pull up resistors, and by isolating the DC load from the trigger circuit via junction drops and the 10nF capacitor. If there is too much power comming from the solar cell then the motor might run too often or even continuously.....
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This is a successor of the PIC16C71 4-digit LED f-counter & V-meter. Some hard to find parts used in the previous version, which are out of production for some time, has been omitted. A rather early PIC16C71 has also been replaced by 28-pin device PIC16F876.....
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The second method is to record (realtime) the actual bark in an analog CCD delay line (~100 msec FIFO) and upon recognition that the sound is a bark, the device plays back-through a loudspeaker-that last recorded 100 msec of bark. It really confuses them;....
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Interface the LCD with 8051 microcontroller at89s52. But whenever I power up the microcontroller, LCD is lit but only black boxes are showing. I have tried many different codes and many things, but display is same. onle black boxes. But i have simulated this....
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Closed loop or servo system has the ability to stabilize the controlled plant at a specified operating condition. The plant, the controlled sub-system, can be....
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Adjust the component values in the two RC networks to get exactly the tones you want. 3V low stand-by current. Kit includes 1 x switch, 1Watt 8ohm speaker, 2 x AA batery holder, COB and mother board. COB PCB size: 16mm x 29mm. (CPSSG5)..
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This paper outlines a clear printed circuit board layout for implementation of the MAX8632 Integrated DDR Power Supply. This chip functions as an integrated DDR Power-Supply Solution that utilizes a synchronous-buck controller to generate VDDQ main rail, a 3....
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Stepper motors that feature unipolar drives are widely used in applications that require high torque loads and fast position attainment. The unipolar operation provides stable Motor Control using a rel- atively simple firmware, as compared to bipolar drives.....
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This simple power mosfet audio amplifier circuit, with TL071C and 2 MOSFETs (IRF9530 and IRF530) can deliver up to 45 Watts on 8 © speaker. This schematic is based on Siliconix application and on variations of voltage on the 2 resistors that are serial....
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In this post I will publish the circuitschematic diagram of Power Amplifier with 500watt output mono, yesterday happened to date July 18, 2012 order I able to make Power Sound System 1000 watts stereo output, which is used Sanken Transistor Final original....
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A schematic that details the connections to the Clare IXDI404PI chip that is both the brains and the brawn of the Back-And-Forth robot that you can make yourself....
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The Current Sensor Board contains an Atmel AVR AT90S8535 running at 8MHz which samples six ADC current inputs and uses the remaining two ADC inputs to control an integrating charge counter and packages the results up into data packets which are sent to the....
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This circuit shows about Signal Generator Electronic Circuit Diagram. Features: UNLESS OTHERWISE SPECIFIED, RESISTANCE VALUES ARE IN OHMS, ....
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4W FM Transmitter. TECHNICAL CHARACTERISTICS: Stabilised tendency of catering: Vcc=12~16V Frequency of emission: 88~108MHz Consumption: 100~400mA Materially: The...
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The transmitter part of the circuit is build around IC1(NE 555). The IC1 is wired as an astable multi vibrator operating at 40KHz. The output of IC1 is amplifier the complementary pair of transistors ( Q1 & Q2) and transmitted by the ultrasonic transmitter....
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The functional generator is a device that would have any better equipped electronic lab should have a not so frequently used gadgets, but when you need it, we certainly appreciate its convenience. Here is the procedure of the scheme, which was published in....
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This is the electric thermometer circuit composed of LM134. In the circuit, the voltage or current output by LM134 is in proportion to the thermodynamics temperature, which can be read out on the 100?A meter, the test temperature range of the meter is....