24V flasher circuit

john March 3, 2010 11 Comments
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...
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Powerful LED flasher

john December 10, 2009 2 Comments
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...
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Top 5 Mobiles of 2009

john January 17, 2011 3 Comments
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...
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Battery eliminator circuit

john December 14, 2009 25 Comments
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....
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Voltage Multipliers

john October 19, 2009 6 Comments
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...
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Diode Clamping Circuits

john March 28, 2011 18 Comments
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...
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Transistor Clipping Circuits

john March 28, 2011 4 Comments
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...
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Diode Clippers – Applications

john February 21, 2011 1 Comment
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...
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Clipping Circuits

john February 21, 2011 6 Comments
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...
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Sweep Frequency Generator

john March 28, 2011 3 Comments
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...
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Signal Generators

john February 22, 2011 1 Comment
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...
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Selection Of An Oscillator

john March 28, 2011 No Comments
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...
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Negative Resistance Oscillators

john March 28, 2011 2 Comments
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...
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Beat Frequency Oscillator (BFO)

john March 4, 2011 2 Comments
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...
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Wien Bridge Oscillator

john August 14, 2017 20 Comments
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...
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Transistor Phase Shift Oscillator

jojo January 29, 2014 3 Comments
RC Phase shift oscillator. RC phase shift oscillator or simply RC oscillator is a type of oscillator where a simple RC network (resistor-capacitor) network is used for giving the required phase shift to the feedback signal. In LC oscillators...
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Phase Shift Oscillator

jojo March 28, 2011 1 Comment
  We select the so called phase shift oscillator  as a first example as it exemplifies very simply the principles set forth in the previous blog post. The circuit is drawn to show clearly the amplifier and feedback network. The...
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Audio Oscillators

jojo March 28, 2011 1 Comment
An introduction to Audio Oscillators also known as RC Oscillators So far, we have considered the oscillators which use L-C tuned circuit that causes a phase shift of 180° due to inductive or capacitive coupling in addition to a...
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Crystal Oscillator

jojo March 28, 2011 3 Comments
In crystal oscillators, the usual electrical resonant circuit is replaced by a mechanically vi­brating crystal. The crystal (usually quartz) has a high degree of stability in holding con­stant at whatever frequency the crystal is originally cut to operate. The...
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Hartley Oscillator

jojo February 4, 2014 9 Comments
Hartley oscillator circuit. Hartley oscillator was invented in 1915 by the american engineer Ralph Hartley while he was working for the Western Electric company. The original design was tube based and he got a patent for it in the...
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Clapp Oscillator

jojo March 28, 2011 No Comments
  The Clapp oscillator shown in figure. is a refinement of the Colpitt’s oscillator. The single inductor found in the Colpitt’s oscillator is replaced by a series L-C combination. Addition of capacitor Ca in series with L improves the...
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1500+ Subscribers for CircuitsToday.com

jojo October 12, 2009 2 Comments
We are very glad to announce that our E-Mail subscribers count crossed 1500 today and is increasing at a good pace. We thank every electronic enthusiasts and we dedicate this moment to each and every people who visited CircuitsToday and...
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Colpitts Oscillator

jojo February 4, 2014 5 Comments
Colpitts Oscillator. Colpitts oscillator was invented by American scientist Edwin Colpitts in 1918. It is another type of sinusoidal LC oscillator which has a lot of applications. The Colpitts oscillator can be realized using valves, transistors, FETs or op-amp....
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