Description. The circuit given below is of a telephone operated DTMF remote. The circuit can be used to switch up to 9 devices using the keys 0 to 9 of the telephone. Digit 0 is used to switch the telephone system between remote switching mode and normal conversation mode. IC KT3170 (DTMF to BCD decoder) […]
Definition A capacitor is an electronic device that is used to store electrical energy. They are only used to store the electrons and they are not capable of producing them. Invention of the Capacitor There are many stories behind the invention of the capacitor. A German scientist named Ewald Georg von Kleist was known to
Description. The circuit diagram given here is of a stepper motor driver using MC3479 from Motorola. The MC3479 is specifically designed for driving a 2 phase stepper motor in bipolar mode and is available in standard DIP and surface mount packages.The IC is compatible to TTL and CMOS inputs and has selectable HIGH/LOW output impedance.
Introduction Global Positioning System (GPS), has found itself as a gateway for the cutting edge technology for this century. It was designed and developed by USA during the late 19th century after recognizing its importance in military applications. Due to its accurate positioning capabilities and navigation and timing services it was later open for civilian
Description. Circuit shown here can be used to jam FM radios in its vicinity. The circuit is nothing but a classic single transistor oscillator operating in the VHF region. Working principle of the circuit is very simple and straight forward. Powerful VHF oscillations from the circuit will interfere with the FM signals to nullify it.
In this project, we learn how to create a high range FM transmitter, which has the range of 2 kilo meter (2KM) radius. This is basically a simple DIY hobby circuit and you can try it in your home with minimal components. Start building this high range FM transmitter and see how your output comes.
As we all know Light Emitting Diodes(LED’s), are used in a wide range of applications like indicators, long-lasting source of illumination in sensors, home and also industrial applications. They are known for their less heat dissipation and also as an electricity saver. If our usual bulbs like incandescent and fluorescent bulbs are to be
Description. The circuit shown here works from 24V DC and can flash two 24V bulbs alternatively. The circuit is nothing but an astable multivibrator operating at 1Hz and 50% duty cycle. The lamp to be flashed is connected in place of the collector resistor (Rc) of a typical design. 2N3055 transistors which are well known
Description. This is the circuit diagram a powerful LED flasher. High power LEDs are very common in the market now and a 1W high power LED is used here. Transistors Q1 and Q2 are wired as an oscillator which produces positive pulses of width 20ms @ ½ Hz. Transistor Q3 and MOSFET Q4 inverts this
As we are coming towards the end of 2009, it is time to declare the detailed list of the best mobiles of 2009. The list contains a brief review of some of the best featured as well as best selling mobiles throughout the world. Apple i-phone 3GS – 32 GB (AT &T) The mobile industry
Description. Here is the circuit diagram of a battery eliminator circuit that can be used as a replacement for 9V PP3 batteries. The circuit given here can be used to power any device that operates from a 9V battery. The transformer T1 steps down the mains voltage and bridge D1 performs the job of rectification.
Half-Wave Voltage Doubler Availability of common point between input and output lines for earthing – Yes, available Ripple Content – High Ripple Frequency – Supply Frequency Voltage Regulation – Poor Maximum Voltage Across Each Capacitor – 2 Vs max PIV Rating Of Each Diode – 2 Vs max Full-Wave Voltage Doubler Availability of common point
Voltage multiplier is a modified capacitor filter circuit that delivers a dc voltage twice or rnore times of the peak value (amplitude) of the input ac voltage. Such power supplies are used for high-voltage and low-current devices such as cathode-ray tubes (the picture tubes in TV receivers, oscilloscopes and computer display). Here we will consider
Diode Clamping Circuit In this article, the working of a clamping circuit is explained. The working of different clamping circuits like positive and negative clamper, with circuit diagrams and waveforms, are given below. Related Articles CLIPPING CIRCUITS DIODE CLIPPERS DIODE CLIPPERS – APPLICATIONS TRANSISTOR CLIPPING CIRCUITS A clamping circuit is used to place either the
Transistor Clipping Circuits In this article, the transistor clipping circuits is explained in detail along with the circuit diagrams and waveforms. The transistor clipper circuit waveform for ramp and sinusoidal input is given below. Related Articles CLIPPING CIRCUITS DIODE CLIPPERS DIODE CLIPPERS – APPLICATIONS DIODE CLAMPING CIRCUITS The transistor has two types of linearities —One
Application of Diode Clipper In this article, all the applications of diode clipper is explained in detail. Related Articles CLIPPING CIRCUITS DIODE CLIPPERS TRANSISTOR CLIPPING CIRCUITS DIODE CLAMPING CIRCUITS There are numerous applications for diode clippers. They find wide application in television receiver for separating synchronizing signals from composite picture signals and also in television
Diode Clippers – A study of various Clipping Circuits This article explains the working of different diode clipper circuits like Positive and Negative Diode Clippers, Biased Clipper circuit, and Combinational Clipper Circuit with the help of circuit diagrams and waveforms. What is a clipping circuit? A clipping circuit or a clipper is a device used
Clipping Circuits This article defines the basics of Clipper Circuit, classifications according to the devices used, biasing, configuration, level used and so on. Related Articles TRANSISTOR CLIPPING CIRCUITS DIODE CLIPPERS DIODE CLIPPERS – APPLICATIONS DIODE CLAMPING CIRCUITS Clipping circuit is a wave-shaping circuit, and is used to either remove or clip a portion of the
Sweep-Frequency Generator The working of a sweep-frequency generator is explained in the article below. The working and block diagram of an electronically tuned sweep frequency generator and its different parameters are also explained. Related Article SIGNAL GENERATORS A sweep frequency generator is a type of signal generator that is used to generate a sinusoidal output.
Signal Generators In this article, the detailed explanation of a signal generator is given. The principles of signal modulation, the block diagram of an AM signal generator and the measures needed to achieve a stable frequency output is explained below. RELATED ARTICLE SWEEP FREQUENCY GENERATOR Like an oscillator, a signal generator is also a source
RELATED ARTICLE VOLTAGE CONTROLLED OSCILLATOR (VCO) SWEEP-FREQUENCY GENERATOR BEAT FREQUENCY OSCILLATOR (BFO) WIEN BRIDGE OSCILLATOR PHASE SHIFT OSCILLATOR Here are the parameters that are to be noted while selecting an oscillator for a particular application. Frequency Range. The oscillator selected for a particular application should be caÂpable of supplying an output signal whose upper and
In this article, the working of a negative resistance oscillator is explained along with its types-dynatron and tunnel diode oscillator. The tunnel diode oscillator characteristics and circuit is also explained in detail. Related Articles VOLTAGE CONTROLLED OSCILLATOR (VCO) SWEEP-FREQUENCY GENERATOR BEAT FREQUENCY OSCILLATOR (BFO) WIEN BRIDGE OSCILLATOR PHASE SHIFT OSCILLATOR TRANSISTOR PHASE SHIFT OSCILLATOR Negative
Beat Frequency Oscillator (BFO) Related Articles OSCILLATOR OPERATION TUNED BASE OSCILLATOR PHASE SHIFT OSCILLATOR COLPITTS OSCILLATOR Use the link OSCILLATORS to see all the articles including the working of oscillators, frequency stability, types and so on. The beat frequency oscillator (BFO) is used to produce a variÂable frequency output in the audio-frequency (AF) range. BFO
Wein Bridge Oscillator is one of the mosttypesular type of oscillators used in audio and sub-audio frequency ranges (20 – 20 kHz). This type of oscillator is simple in design, compact in size, and remarkably stable in its frequency output. Furthermore, its output is relatively free from distortion and its freÂquency can be varied easily.
If the load resistance RL is reduced or load terminals are shorted accidenÂtally, a very large load current will flow. It may destroy the pass transistor Q1, diode or possibly some other component. Fuse protection will not prove adequate because the transistor may get damaged in a very small fraction of a second To avoid
