At this time’s a clean low supply rail detection circuit to outlay peanuts and takes a short time ago 20 minutes before so to make it to. Its power consumption is quite low, so it may perhaps effortlessly be alive built into battery-powered policy. as a replacement for of using an op amp, the circuit is built around three low-cost transistors (Q1-Q3). Diodes D1-D3 form a 1.8V...
Friday, 31 October 2014
Mains Supply Failure Alarm
Whenever AC mains supply fails, this circuit alerts you by sounding an alarm. It also provides a backup light to help you find your way to the torch or the generator key in the dark. The circuit is powered directly by a 9V PP3/6F22 compact battery. Pressing of switch S1 provides the 9V power supply to the circuit. A red LED (LED2), in conjunction with zener diode ZD1 (6V),...
Solid State Hybrid
As opposed to discrete designs, the IA502 uses an IC to drive the power stages. The entire power amplifier circuitry for 2-channels are squeezed into a tiny TDA7250 10-pin IC. All thats required are four power darlingtons and some passive components to complete a high performance stereo amplifier. No biasing is required as the IC auto biases the output transistors. The IA502...
Thursday, 30 October 2014
Graphic Equalizer Schematic 10 band Mono
This really is ten band graphic equalizer for 1 channel (mono) audio program. You will need build 2 similiar circuits for 2 channel (stereo) audio method. This equalizer construct depending on TL074 low sound JFET op-amp that will give you top quality audio output.Graphic Equalizer Schematic 10 band Mono Part List:....20= 10KohmsC4= 10nF polyesterC18= 68pF polysterineR21....40=...
Nmos Power Amplifier Series Part 2
Power Amplifier with quasi complementary model is the final power amplifier with the transistors of the same type (N all) or (P all), not using transistor pairs. Connecting post part 1, in section 2 is still to review mosfet power amplifier.Nmos350 / Nmos500Two output stage configurations capable of delivering up to 350 watts or up to 500 watts into a 4 ohm load. Schema...
Fluorescent Tube Basics
While they have been with us for many years, fluorescent lamps remain somewhat mysterious to most people. This isnt really surprising, since their operation isnt simple. The tube itself contains a mixture of gases, but the active ingredient is mercury. When operated as an arc, mercury vapour emits a vast amount of short-wave ultraviolet light. This is invisible, but phosphors...
Wednesday, 29 October 2014
Interfacing Keypad and LCD Embedded Microprocessor
This is circuit for interfacing I/O keypad and LCD that can study in laboratory for student to experience interfacing basic I/O devices to the HCS12 microcontroller mounted on the CML12S-DP256 development board. The keypad that using in this circuit is a standard 4 X 4 matrix keypad with 4 rows and 4 columns. This is the figure of the interfacing of keypad. The DCM-20434 LCD...
Emergency Power Generator Source
Nearby are many period as soon as even more power generator is looked-for, but not free. If an outlet is not inside spread otherwise plugging into the control panel cigarette lighter is simply not an option, youll happen content with the aim of you partake of the Xantrex Powerpack 600HD. This 600-watt device is an all-in the field of-individual constituent so as to is not merely powerful adequate to start your car, but robust enough to provides portable...
100W Hi End Audio Amplifier SymAsym5
Symasym5_3Symasym5, is a "cute" power amplifier, designed with quality but still low price in mind. This resulted in a ClassAB BJT amplifier, using only TO92 transistors for input and VAS, with a reasonable part count. The topology used is well known and consist of a single diffamp for input, plus a 2nd diffamp with current mirror for VAS. This is followed by normal darlington...
Portable Muscular Bio Stimulator
This is a small, portable set, designed for those aiming at look improvement. The Bio-Stimulator provides muscles stimulation and invigoration but, mainly, it could be an aid in removing cellulite. Tape the electrodes to the skin at both ends of the chosen muscle and rotate P1 knob slowly until a light itch sensation is perceived. Each session should last about 30 - 40 minutes. Portable...
Tuesday, 28 October 2014
Alarm Sound with Control Switch
The heart of this circuit is IC No. 555. When the alert sound was working, even though the switch will continue to be the same, the sound still does not stop immediately.But it will stops automatically, when a set time period,Depending on the resistance of R3, the circuit so I set a time period equal to 1M for 1 minute 6 seconds.Alarm Sound with Control SwitchThe output of...
20 Watt Class A Power Amplifier Circuit
A single-ended Class-A amplifier is essentially one where there is only one active driven output device. The passive "load" may be a resistor, an inductor (or transformer) or - as in this amplifier - a current sink. Of the three basic options, the current sink offers the highest linearity for the lowest cost, so is the ideal choice.Some esoteric (some might say idiosyncratic)...
Stereo to surround sound systems
Circuit quad amplifier or stereo to surround sound systems using the ic tda7375 to power of 7 watts per channel amplifier version quad or dual 15-watt version (stereo). reaching up to 35 watts in mono version.The TDA7375 is an integrated circuit quad amplifier class AB audio amplifier capable of working in double bridge or quad amplifiers simple integrated circuit protection...
Monday, 27 October 2014
TDA1524 Stereo Tone Control
Here is a stereo preamplifier circuit with built in tone control facility. A very useful circuit using versatile tone control IC TDA 1524 from Phillips.diagram TDA1524 Stereo Tone ControlThis circuit is designed as per the data sheet as an effective stereo-tone & volume control for car stereos , TV sets or any sort of stereo amplifier circuit you want.The circuit includes...
Stereo High Power Audio Amplifier
This is a stereo amplifier circuit which has a high output power and excellent sound quality. Amplifier circuit has a very high gain output stage resulting in the deterioration of signal noise distance. This amplifier circuit having an output power of more than 400 Watt x 2 (Stereo) with the speaker impedance 4 Ohm - 8 Ohm. Power supply voltage circuit to supply this high...
IC Amplifier with HA13118 Diagram
IC amplifier 18 watt circuit is an IC digit HA13118 Hitachi powerfully. with the intention of the IC yearn for take place integrated amplifiers, categorize AB. And this cycle is to assistance a association circuit. to the same degree a answer, growth toll up to 55 dB. And pressure from 8-18 volt the current 1-2 amps, with not as much of than 0.2% distortion by 1W. And response....
USB cable signals
USB cable consists of 4 wires plus a conductor wire wrapping, such as the protectors are usually found in the audio cable. Cable number 1 is used to channel resources to the voltage of 5 volts, if necessary USB devices may draw power from this line and should not exceed 100 mA. Computer equipped with USB capability, is required to provide power at 100 mA for this...
Sunday, 26 October 2014
KA2107 Tone control electronic circuit project
A very simple tone control electronic circuit project can be designed using the KA2107 integrated circuit manufactured by Samsung Electronics . This tone control electronic circuit project is very simple requiring few external electronic parts . As you can see in circuit diagram the KA2107 tone control circuit project is designed for stereo application and it has some additional...
Saturday, 25 October 2014
I2C Bus Electrical Isolation Diagram Circuit
When the SDA (Serial DAta) lines on both the left and right lines are 1, the circuit is quiescent and optoisolators IC1 and IC2 are not actuated. When the SDA line at the left becomes 0, current flows through the LED in IC1 via R2. The SDA line at the right is then pulled low via D2 and IC1. Optoisolator IC2 does not transfer this 0 to the left, because the polarity of the...
Friday, 24 October 2014
Condenser Pre Amplifier LM 1458
This is a simple preamplifier circuit for electret condenser microphone. using a LM1458 dual op amp IC. The circuit takes the audio signal rom the condenser microphone and amplifier it, so you can use the microphone as the input to some device which wouldn’t normally accept microphone level signals .Schematic Circuit of Microphone ElectretCondenser Pre AmplifierThe circuit...
1 3 12 2 VDC Variable Power Supply
Power supply circuit to generate output below were variations between 1.3V DC to 12.2V DC with 1A current.In addition, the power supply circuit is also equipped with over-current protection or shield against belebih flow. Power supply circuit is very simple, but the quality is quite good, made her basiccally regulator IC LM723 is a fairly legenda...
Thursday, 23 October 2014
10Mhz to 1 MHz Frequency Converter
10Mhz to 1 MHz Frequency Converter CircuitPart ListIC1 7404 = 1IC2 7490A = 1R 1 K = 2R 3.3 K = 1C Trim Polymer 39 pF = 1C Electrophoresis 4.7 uF 16V = 1C Milar 47 nF 16 V = 1C Milar 10 nF 16 V = 1C Ceramic 68 pF 50 V = 1&nb...
Technology Spending Limits and the Auto Sound System
We live in a world that is constantly changing and evolving. We see it every time we buy a new car, a new television, or a new computer. We see it every other month when the iPod is putting out a new an improved model that offers more features, more disk space, and more everything, in a smaller package (well not since they added video but until then, the gadgets were getting smaller while the features were growing exponentially). The truth of the...
3000W Stereo Power Amplifier Circuit
Circuit Power Amplifier has a power output of up to 1500W RMS power amplifier circuit is often used to power sound systems keperlun for outdor. In the final image can be seen a series of power amplifiers using 10 sets of power transistors for the ending. This power amplifier circuit using a transistor amplifier from the front, signal splitter, driver and power amplifier. Current...
