Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Amplifying feeble AC voltage from small coil which is having the presence of magnet

Status
Not open for further replies.
varunme

varunme

Advanced Member level 3
Joined
Aug 10, 2011
Messages
741
Helped
17
Reputation
36
Reaction score
17
Trophy points
1,318
Activity points
5,764
Amplifying feeble AC voltage from small coil which is having the presence of bar magnet, which i want to use as a sensor of movement

someone help me in making in amplifier, can i build with opamp ?
 

You can use any amplifier design But with out knowing the exact input Voltage and the op power you need no one in this earth can help you to find a solution

Do post the signal strength of the feeble signal you get and also the strength of the op signal you need
 

when moving the magnet very fast ( actually its an encoder in a magnet) , multimeter shows 1V , i like to get 5V so that can be fed to uC
 

Use an LM741 in inverting amplifer configuration That should do the job for you

Use Rf = 5k and the Ri around 1k for getting the desired output
 
  • Like
Reactions: varunme

    varunme

    varunme

    Points: 2
    Helpful Answer Positive Rating
can i use lm358 also ?
 

These devices consist of two independent, high-gain, frequency-compensated operational amplifiers designed to operate from a single supply over a wide range of voltages. Operation from split supplies also is possible if the difference between the two supplies is 3 V to 32 V (3 V to 26 V for the LM2904), and VCC is at least 1.5 V more positive than the input common-mode voltage. The low supply-current drain is independent of the magnitude of the supply voltage.

Applications include transducer amplifiers, dc amplification blocks, and all the conventional operational amplifier circuits that now can be implemented more easily in single-supply-voltage systems. For example, these devices can be operated directly from the standard 5-V supply used in digital systems and easily provide the required interface electronics without additional ±5-V supplies.
Click to expand...

This is true so you can use it

Here you will use a single supply but the same design procedure as that of the Lm741
 
  • Like
Reactions: varunme

    varunme

    varunme

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top