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    how to find out the frequency of an amplifier

    Hi guys! well! i have a question here. How i can find out the frequency of an amplifier in order to find the Xc of the bypass and coupling capacitors to be used in it. ? please help me as soon as possible. thanks and Good Bye!
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    Laser Communication

    Hi guys! well im posting below two diagrams. The 1st one is of the transmitter and the other one is for the reciever. The laser light will be used as the signal carrier. My question is this that as it is written in the diagram that the condenser mic is to be used. Now is it correctly written...
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    controlling the PC with IR remote control

    Hi Guys! well ! i want to make a circuit with which i can control the computer with a TV remote control. IN the projects>PC related section of this website there is  a circuit (Billy's Plug) which im looking for reference but the greates problem in implementing that is this that the IC TSOP...
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    making a circuit grounded

    hi guys! well im making a circuit involving the PC serial port. One pin i need to ground. Now i want to ask you that how should i do that! should i just connect it to the negative terminal of my battery? or should i make this ground by some special way? if this is i have to do then how to do...
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    Dual Polarity Power Supply

    Hi guys! well! i m trying to build a power supply in order to power up my operational amplifier circuit which requires around 12-15 V and 245mA of current! will this circuit be suitable for that! http://www.electronics-lab.com/projects/power/015/index.html here is its circuit diagram: now...
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    Variable DC Power Supply

    HI guys! well! i just came across this circuit in the project section of this website: http://www.electronics-lab.com/projects/power/011/index.html here is its diagram: now i want to ask you about its quality? will it work properly or not? i want a voltage of around 12-15 V and a current...
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    difference between negative supply and ground???

    Hi Guys! well! i have seen in many circuits diagrams that there are some connections to a negative supply lets say "-5V" and some to grounds. now i want to ask you that what is the difference between them? actually i want to know it like this that while making a circuit how we have to...
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    Audio Amplifier Plz check this out

    Hi Guys! well! i have designed this audio amplifier. It is intended to operate an 8ohm speaker. Tell me whether it is correct or not? what are the technical deficiencies and how to remove them. remember that the input AC source actually representing a mic Thanks and Good bye!
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    designing a power audio amplifier with OP AMP

    Hi Guys! well! i want to design a power audio amplifier with OPAMPS. Now i read somewhere that the one of the various Op Amps available for this is LM380. Now here is the basic circuit: now my dear friends! this circuit will work i guess. But i dont think that its a power amplifier. Now can...
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    want to make an audio amplifier

    Hi Guuys! here is what i want to do! I want to make an Audio Amplifier with the help of a BJT Transistor. What transistor will be suitable. I want to use 8ohm speakers. Secondly, tell me about the types of feedbacks i have to provide. I shall be thankful if you will provide me good details...
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    Please recommend the alternative of this IC

    Hi Guys! How are you? well! im trying to make the following project: http://www.electronics-lab.com/projects/pc/019/index.html Now the problem is that following parts are not available in my areas: TSOP 1736/38/40 I know that this IC is the backbone of this circuit, but unfortunately this...
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    Please tell me the alternatives of these

    Hi Guys! How are you? well! im trying to make the following project: http://www.electronics-lab.com/projects/pc/023/index.html Now the problem is that following parts are not available in my areas: 400MHz resonator 200MHz resonator remember that the author of this circuit has advised me...
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    Simple Parallel Combination Question

    Hi Guys! well! today i have a very simple question to u. The circuit which i have drawn below is a simple parallel combination circuit. Can u Tell me the voltage across each resistor separately.i.e. What is the voltage across 20ohm resistor? What is the voltage across 100ohm resistor? Im not...
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    Voltage that drives the speakers

    HI Guys! well! i have a simple question to u. I know this thing that a microphone provides u with some AC voltage in an audio amplifier. But what is that voltage in an audio amplifier, that goes into the speaker in order to drive it. Is it AC or DC? Thanks in advance!
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    Analyzing my amplifier project

    Hi Guys! well! i have made the amplifier whose picture i have attached in this post. It is just a voltage amplifier, no sound, no speakers. All the voltages will be provided thru the COnsoles available in our labs. I want to ask u somethings here: First of all! have a close look at this...
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    Problem with my breadboard

    Hi Guys! im facing a terrible problem here. I have designed a circuit that works very well according to my software simulation. Remember im using MULTISIM 2001 for the circuit simulation. But when i tried to make the same ciruit on my breadboard, it just didnt give me the same results, infact...
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    Replacement of two components

    Hi Guys! Well! i have a circuit in which the following two components are used. This circuit is of a transmitter: 1)Varicap Diode 2)Ceramic Filter (crystal) one problem is this that the above two components, i just donot know about them. Can u plz suggest me any alternative, that i can put in...
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    MOSFET AMPLIFIER

    Hi Guys! i have posted my circuit below which u can see. I have two questions here: 1) Which MOSFET will be the most suitable one for this amplifier? 2)What will be the magnitude of the input signal generated by the microphone? Let me clearify my questions to u! well! the input signal...
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    MOSFET AMPLIFIER: is it possible????

    Hi Guys! how are u all? Well! i want to ask u people a simple question? Is it possible to make an amplifier with the help of MOSFETS only, remember, no BJTs, No Power FETs, only simple MOSFETS , capacitors, resistors, diodes ZENERS are allowed. Plz help me because i have to make a project...
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    LOAD RESISTOR IN A MOSFET AMPLIFIER

    Hi Guys! well! i have designed a mosfet amplifier. This amplifier uses only MOSFET in its operation along with an input signal and capactors and resistors and VDD. I want to ask u one thing. The amplifier which i have designed takes 0.1V of AC signal as an input and provides a gain of 3.3V/V...
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