Preview

Pic Microcontroller Based Lcf Meter

Satisfactory Essays
Open Document
Open Document
310 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Pic Microcontroller Based Lcf Meter
-------------------------------------------------
Pic LCF Meter (Simple Monitoring of inductance, capacitance & frequency)

THIS simple PIC-based unit was designed to measure and display the values of inductors and capacitors.As a by-product of the technique used.it can also display the frequency of an external 0V/ +5V signal source The ranges are approximately:
Capacitance : 1pF to 6500uF
Inductance : 1uH to 10H
Frequency : 0.05Hz to 5MHz

The design is based upon the concept that osillators can be constructed from CMOS NAND gates or inverters.and that their oscillation frequency depends on the valuesof inductance. capacitance and resistance in their feedback paths. Using a suitable microconteroller. Such as one from the PIC 16F62x or PIC 16F87x families. software can read the frequency of an oscillator and calculate the value of the ot- her components are known.In this design. A PIC16F628 is used and the results are output to an alphanumeric liquid crystal display (I.c.d.). One technique for using an inductor in a CMOS oscillator circuit is that shown in Fig.1.Here the oscillation frequency is determined by the formula:
F = _______1_______
2 x 7 x / ( L x C ) where: F = frequency
C = C1 x C2
C1 x C2
L = inductance
7 = 22/7
Using this formula. If any two values are known. The third can be readily calculated For instance . if C and F are known. Than I can be calculated using the formula:
( 1_____)
L = ( 2 x 7 x F )
C
Similarly using the capacitance –resistance oscillator configuration ,.the output Frequency can be calculated for known values of R and C. several formulae exist for this calcUlation and the one used in this application is:
F = ____1____
7 x R x C from which the value for C can be calculated if R and F are known:
C = 1___
7 x R x F
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Powerful Essays

    Lm358 Unit 4
    • 2908 Words
    • 12 Pages

    Lm358 Unit 4

    Utilizing the circuit designs perfected for recently introduced Quad Operational Amplifiers, these dual operational amplifiers feature 1) low power drain, 2) a common mode input voltage range extending to ground/VEE, 3) single supply or split supply operation and 4) pinouts compatible with the popular MC1558 dual operational amplifier. The LM158 series is equivalent to one–half of an LM124. These amplifiers have several distinct advantages over standard operational amplifier types in single supply applications. They can operate at supply voltages as low as 3.0 V or as high as 32 V, with quiescent currents about one–fifth of those associated…

    • 2908 Words
    • 12 Pages
    Powerful Essays
    Read More
  • Satisfactory Essays

    ECT122 W4 ILab 2
    • 475 Words
    • 3 Pages

    ECT122 W4 ILab 2

    8. Prototype the circuit below on the breadboard. Connect the circuit’s input to the variable +12 V supply. Turn on the DC power supply and use the handheld DMM to set it to +10V. Using the handheld DMM, measure the values below.…

    • 475 Words
    • 3 Pages
    Satisfactory Essays
    Read More
  • Satisfactory Essays

    Nt1310 Unit 1 Lab Report
    • 344 Words
    • 2 Pages

    Nt1310 Unit 1 Lab Report

    In experiment 2 our main objective was to understand the analysis of resistors, inductors and capacitors in a sine wave circuit. we measured the impedance of the inductor and capacitor using a current sensing resistor. Inductive reactance is the opposition to the flow of current, and capacitive reactance is the opposition to the flow of charge. The tools we used for this experiment a pair of resistors, an inductor, a capacitor, dual channel oscilloscope, audio oscillator, and a digital multimeter. Using the oscilloscope we where able to measure the devises easily. Using the audio oscillator too change our setting to the wright context we measured the Vrms of our circuits. Using the Vrms we were able to find all of our unknowns using equations and our knowledge of circuit analysis.…

    • 344 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    M19 Lab
    • 548 Words
    • 3 Pages

    M19 Lab

    2. Calculate and record the reactance (XC) of the 0.1 μF capacitor when connected to a 100 Hz AC voltage.…

    • 548 Words
    • 3 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    ECT114 week 3 lab
    • 299 Words
    • 2 Pages

    ECT114 week 3 lab

    e. Write a technical statement describing the circuit configuration and behavior of Figure 1. Include the name of the logic circuit a written interpretation of the function table. (2 points)…

    • 299 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Satisfactory Essays

    Nt1310 Unit 10 Research Paper
    • 742 Words
    • 3 Pages

    Nt1310 Unit 10 Research Paper

    Paper II - Section : II Embedded Systems INDEX No 1 2 3 4 5 6 7 8 9 10 Toggle Port LED Simulate Binary Counter at Port Generate delay using TIMER_0 Stepper Motor (clockwise/Anticlockwise) Generating square wave at port pin Generating Triangular wave at port pin Sine wave generation using look-up table Microcontrollers communicating over a serial link Read switch-status from i/p port and display at o/p port Using Input Capture Pin (ICP), measure pulse width & display at o/p port Topic Date 6-9-2010 9-9-2010 17-9-2010 24-9-2010 8-10-2010 15-10-2010 15-10-2010 29-10-2010 22-11-2010 24-11-2010 Page 02 03 04 06 07 09 10 11 13 15 Sign…

    • 742 Words
    • 3 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Physics Standing Waves Lab
    • 713 Words
    • 3 Pages

    Physics Standing Waves Lab

    not be able to fill all the spaces in the table, but should find at least five resonant frequencies. The frequency…

    • 713 Words
    • 3 Pages
    Good Essays
    Read More
  • Powerful Essays

    Ac Circuits. Oscilloscope
    • 1480 Words
    • 6 Pages

    Ac Circuits. Oscilloscope

    The main goal of this experiment to Investigate the sine wave AC signal from signal generator using the scope and determine the relationships between the rms value and the amplitude of the voltage as well as the period and the frequency of the signal. The following are the results of the lab: T= 10-3seconds, Vo=1.4V , 2% discrepancy in Vrms, 7.1% discrepancy in V0, ω=1.1*104±2.5*103, ωotheoretical=10846.5 Hz , 0.3% discrepancy in ω0.…

    • 1480 Words
    • 6 Pages
    Powerful Essays
    Read More
  • Good Essays

    Cmos
    • 1671 Words
    • 7 Pages

    Cmos

    → The propagation delay of the CMOS inverter is determined by the time it takes to charge and discharge the capacitances present in the logic circuit → The two parameters are the high-to-low propagation time,tPHL and the low-to-high propagation time, tPLH. → tPLH is the time measured from the voltage on the falling input waveform to the same voltage on the rising output voltage. → For the low-to-high transition, the n-channel device is cutoff and the p-channel MOSFET is initially saturated and supplying - IDp(sat) to charge up the gate and parasitic capacitances → tPHL is the time measured from the voltage on the rising input waveform to the same voltage on thefalling input waveform. → VIN switches instantly from low to high. Driver transistor (n-channel) immediately switches from cutoff to saturation; the p-channel pull-up switches from triode to cutoff. → TP (propagation delay) = ( tPLH+ tPHL)/2…

    • 1671 Words
    • 7 Pages
    Good Essays
    Read More
  • Powerful Essays

    Oscillator
    • 7822 Words
    • 32 Pages

    Oscillator

    Abstract Microwave oscillator design is based on the principle of generating a negative resistance to compensate for the losses of the resonator. Several circuit combinations, including one- and twoport oscillators, are possible. In this discussion, we will first evaluate the conditions of oscillation for the Colpitts and Clapp-Gouriet oscillator. We will then evaluate a 19-GHz SiGe-based oscillator by assuming values, backed up by available S parameters and dc I-V curves, that we assigned to the nonlinear BFP520 model. So far it has been difficult to obtain complete documentation on modeling for the SiGe transistors, but our approximation appears to be justified. Next, we will evaluate a ceramic-resonator-based oscillator and show its performance. Going up to higher frequencies, we will introduce a 47-GHz lumped-resonator oscillator and a VCO at the same frequency that uses GaAsFETs as varactors. In all cases, we will give a thorough treatment of the circuits and their performance. Introduction This presentation will give an overview of both bipolar and GaAsFET-based oscillators, including ceramic-resonator oscillators (CROs). Its purpose is to show not only the linear/nonlinear mathematics, but also how the actual design should be considered, as well as commentary on the results. Many of the predictions can only be obtained by using appropriate software; for this purpose, we have used a harmonic-balance simulator by Ansoft. We also will show some practical circuits, both from the circuit design as well as the actual chip design. In the assumptions we have taken, we have avoided shortcuts so that the approach remains general in nature. It further needs to be pointed out that throughout this discussion, we will assume that each oscillator is followed by an…

    • 7822 Words
    • 32 Pages
    Powerful Essays
    Read More
  • Satisfactory Essays

    Electronics 24 Hr Digital Clock
    • 564 Words
    • 3 Pages

    Electronics 24 Hr Digital Clock

    |To construct a 24-hours Digital Clock using components like 7490, 7447 and some other simple gates. |…

    • 564 Words
    • 3 Pages
    Satisfactory Essays
    Read More
  • Powerful Essays

    Pic16F688 Based-Voltmeter
    • 2792 Words
    • 12 Pages

    Pic16F688 Based-Voltmeter

    The process of circuit design begins with the specification, which states the functionality that the finished design must provide, but does not indicate how it is to be achieved. The initial specification for this project is a dc voltmeter with an input voltage range of 0 to 300 volts. Although there are many parameters that a design specification should contain, such as size, weight, moisture resistance, temperature range, thermal output, vibration tolerance and acceleration tolerance but we shall only pursue electronic circuit specification here. Next is the design process which involves moving from the specification at the start, to a plan that contains all the information needed in order to physically implement the design. This normally happens by passing through a number of stages, although in a simple circuit like it may be done in a single step. The process normally begins with the conversion of the specification into a block diagram of the various functions that the circuit must perform normally referred to as a "black box" design. This approach allows the possibly very complicated task to be broken into smaller tasks which may either be tackled in sequence or done at random and then fixed together to make a whole.…

    • 2792 Words
    • 12 Pages
    Powerful Essays
    Read More
  • Powerful Essays

    Bc547 Data Sheet
    • 2128 Words
    • 9 Pages

    Bc547 Data Sheet

    DISCRETE SEMICONDUCTORS DATA SHEET book, halfpage BC546; BC547; BC548 NPN general purpose transistors Product specification 1997 Mar 04 Supersedes data of September 1994 File under Discrete Semiconductors, SC04 Philips Semiconductors Product specification NPN general purpose transistors BC546; BC547; BC548 FEATURES Low current (max. 100 mA) Low voltage (max. 65 V). APPLICATIONS…

    • 2128 Words
    • 9 Pages
    Powerful Essays
    Read More
  • Powerful Essays

    am broadcast station design
    • 1468 Words
    • 6 Pages

    am broadcast station design

    performing a Class II-A operation with service area requisites of 4.47 mV/m and 100µV/m for primary and secondary respectively.…

    • 1468 Words
    • 6 Pages
    Powerful Essays
    Read More
  • Satisfactory Essays

    Familiarization of Basic Electrical Instruments
    • 327 Words
    • 2 Pages

    Familiarization of Basic Electrical Instruments

    In the first experiment of the course, there are three objectives that are needed to be proven through different materials and procedures. The first is objective A, where we are to identify the values of the resistance and capacitance by measuring and computing. There are no problems about this part since the values are in agreement; meaning it only got a little amount of percent error. Next, objective B wants us to familiarize with the oscilloscope by setting it up to what the lab manual identifies and check if the device is well-functioning. The display did not show much difference between using the CH1 and CH2. The values also were shown clearly by the device. The last one, which is objective C, is to help us familiarize with the function generator and oscilloscope. The values for the first half were still clear but it seemed that the AC voltage differ hugely to the other voltages. While turning the position knobs to shift the cursors at either the peak or complete cycle of the wave, there formed the delta which has significantly agreed to the true value of what it measures.…

    • 327 Words
    • 2 Pages
    Satisfactory Essays
    Read More

Related Topics