Recent content by anita1984

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    Undergrad Can Coulomb's Law be Applied to Calculate the Force Between Two Magnets?

    Hello forum, How to calculate the force between two magnets at each distance r ? can i use Coulomb law ? Thanks in advance
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    MATLAB Any recommendations for using Matlab GUI with microcontrollers?

    Hi Forum , i am planning to communicate with the microcontroller via serial communication and a GUI in matlab. On microcontroller , I can make a serial terminal program that waits for data from MatLab coming through a serial port on the computer. From there I can make it so that MatLab can send...
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    Motor Control H-Bridge: PWM Input to Get Red Output Signal

    Hello i am sending the logic table , i think i have problem with the input signals to the logic gates and the result isn't like my need A and B are in input to the logic gates Av and Bv are the output from thr logic gates A B Av Bv 1 1 0 0 1 0 1 0 0 1 0 1 0 0 0 0 Thanks in advance
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    Motor Control H-Bridge: PWM Input to Get Red Output Signal

    I am building a H-bridge to control motor in forward mode and reverse mode , in the attachment i draw the schematic of the circuit , my problem is that the output signal looks like in the picture DSC07167 black signal and i need it like the red signal. How should the input signal of 2 PWM to...
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    Designing a Logic Gate Hardware for Efficient Table of Logic

    thanks bob , i make it with 2 AND and 2 NOT( i catch the tric), it's not a homework , believe me :-).
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    Designing a Logic Gate Hardware for Efficient Table of Logic

    no it's not home work , i want it to my circuit and i don't know if i can reach such signal
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    Designing a Logic Gate Hardware for Efficient Table of Logic

    XOR and XNOR , but how i can manage them to have 2 output like in the attachment ?
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    Designing a Logic Gate Hardware for Efficient Table of Logic

    Hello Forum , please can someone help me to design the hardware of this table of logic (by the use of the logic gate) , the table is in the attachment. Thanks in advance
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    Galva Motor Driving Techniques: Tips and Ideas for Optimal Performance

    Hi Bob , thanks for your comment. >but not above than 2A< How much PPM for this limit ? About the pin 1,2 and 3 of the galva motor, (Ia,Ib,Diode common),Do you have some simple circuit scheme showing their usage (e.g. Application Note) ? Thanks in advance, Havea nice day.
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    Building an H Bridge 8A Circuit on a Bread Board

    Hello forum , i want to ask you a simple question , i am building a circuit on a bread board, the circuit is an H bridge 8A , is normal bread board can handle this current or the connection inside the bread board will be in not safe mode ? Thanks for reply, Have a nice day
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    Galva Motor Driving Techniques: Tips and Ideas for Optimal Performance

    Hello Forum , i would like to ask you : i have a motor galva motor http://www.cambridgetechnology.com/products/6200/6210.html" , is it a good way to drive it in such way , or maybe you have another ideas ? thanks in advance, Have a nice day
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    Polygonal mirror reflection beam Problem

    Thank you for the ideas , i will try them soon , Have a nice day
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    Polygonal mirror reflection beam Problem

    Hello forum , i have a spindle motor from an HDD and i pasted to this motor 6 facets polygonal mirror, the problem is that the mirrors are not 100% alignment ( it's hand made) and the laser reflected from this mirrors is doing 6 lines ( where it should be one line if all mirrors are good...
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    Little Problem with phototransistor

    Hello uart , i tried to measure the pulses on Pin 1 of the 74HC14 , i read a 3,2KHz and 1,1Volt ,when the speed of the motor is 32 000RPM , which is true i think that 74HC14 needs near 3,3V to work properely , i think to increase the valu2 of R2 is a good idea? do you recommand it to me ...
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    Little Problem with phototransistor

    Little Problem with phototransistor ! Hi Forum ,i am using a laser module, phototransistor SFH309-5, and 74HC14N (Circuit in the attachment) to detect the speed of the motor. On the Vout2 i measured frequency up to 2,8KHz when the speed of the motor is 28 000 RPM (because 6 reflected beam every...