Recent content by prescott2006

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    5V to 5V precision voltage reference

    Is there any IC that can output a precision 5V from a 5V supply?
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    Understanding the Hall Effect in Semiconductors

    Homework Statement There are 4 questions in the assignment. None of them need calculation. The questions is as attached below. Homework Equations None. The Attempt at a Solution 1. I think the "photoconductivity" is a typo, should be replaced with "photoconductor". From Wiki, I...
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    Assorted Resistor and Capacitor

    Anyone could suggest which resistor and capacitor value that used most in home-brew project? Those project basically deal with LED and PIC. I want to buy them in bulk, but I do not know how to assort them. I wish to buy like 50 resistors and 50 capacitors. Looking forward for your help.:)
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    Precision 5V Reference: LT1085 vs LM317

    Anyone can suggest a very precise and constant 5V reference? I Google and see many are recommend LT1085 and LM317? Which one is better? Any better recommendation?
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    Why Do Textbooks Still Use Bohr's Atomic Theory Despite Its Limitations?

    Thanks for the explanations. And the rhinoceros explanation is really cute.:-p Now left question 2 and 4. But maybe you can try to explain as well, I think you really understand it.:-p Also, I am having problem in understand the quantum well, wire and dot. I Google and read them but I don't...
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    Why Do Textbooks Still Use Bohr's Atomic Theory Despite Its Limitations?

    1. Isn't it the Bohr atomic theory is proven incorrect, why some textbook even that publish in 2007 still use it to explain about electron movement? Isn't it should be using SPDF theory? 2. What is meant by satellite valley? 3. How is electron move in atom if not circulate in an orbital? 4...
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    Can Modifying the Flexiforce Drive Circuit Enhance Sensor Performance?

    I get it from Flexiforce data-sheet, that is their recommended excitation circuit. What are the things that look weird? What do you mean by I/O characteristic of the opamp?
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    Can Modifying the Flexiforce Drive Circuit Enhance Sensor Performance?

    Attached is the Flexiforce drive circuit. I would like to ask whether I can improve improve the performance of Flexiforce in term of linearity, hysteresis, repeatability, or whatsoever other parameter by change the drive circuit to Wheatstone bridge or instrumentation amplifier?
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    Where can I find a draft of C code to measure frequency using PIC16F84?

    i want to use measure the frequency of the square wave input at RA4/T0CKI of PIC16F84. so how should i start writing the code? anyone can provide some draft of the c code? thanks.
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    Develop a System/Product using 8085 for Handicap People

    Homework Statement recently, i was on an assignment to develop a system or product based on 8085 to help handicap people.the assignment include software and hardware interfacing.any idea or suggestion please?i wonder what product can be create to help handicap people.need some direction to...
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    Solving 8085 Weird Problem with DCX/DCR Instruction

    i do not request anything here.just want to ask whether you guy ever seen such case or not.
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    Solving 8085 Weird Problem with DCX/DCR Instruction

    we were requested to interface 8085 with memory and led,then a routine need to be written to make the led light up one at a time with delay 1 second.we have simulate the program and it run perfectly but when we test on the circuit we built it doesn't work.after a lot of trial and error,finally...
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    Solving the Black Box Circuit: Determining Impedance & Resistance

    could we probably know the circuit configuration in the box by guessing?given the circuit inside is passive circuit.
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    Solving the Black Box Circuit: Determining Impedance & Resistance

    the impedance will rise/fall?i am newbie in electronic,not too sure what you want to hint.
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    Solving the Black Box Circuit: Determining Impedance & Resistance

    if a black box was given,with two wire pull out from the box.no other additional info was given,then how will you determine the impedance in the circuit?what is the resistance?if given that is a passive circuit,what will the circuit look like? seem the task quite challenging.
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