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  • Digital voltmeter fuel

    2015-01-13 02:32:49199

    The digital fuel voltmeter digital voltmeter (by the IC1 and IC3) shows the amount of fuel.Reading is the percentage of a full tank. To cope with meet ...

  • Easy Crystal Impedance Checker Circuit

    2015-01-13 02:26:5068

    On occasion, microprocessors/microcomputers and microprocessor crystals just aren`t compatible with each other. Many microprocessor data sheets specify...

  • Classification of Active Filters

    2015-01-13 01:02:4966

    The most widely used active filters are (i)???????????????? low-pass (ii)???????????????? high-pass (iii)??????????????? band-pass (iv)?????????????? b...

  • Modulation

    2015-01-13 00:46:03135

    When audio signals are transmitted over thousands of kilometres through radio transmission, the audio frequencies that lie within the frequency range o...

  • Twin-t-notch-filter

    2015-01-12 23:53:21148

    This filter is used to reject or block a frequency or band of frequencies. These filters are often designed into audio and instrumentation systems to e...

  • DC motor controller diagram with SCR and cmos ic

    2015-01-12 23:50:23242

    This is speed controller circuit of 12Volt DC motor.You can adjust the speed of rotation of the spindle motor from 5-60 cycles per minute. The work of ...

  • Digital-to-analog-converters

    2015-01-12 22:51:3370

    The following applications circuits are intended to illustrate the following points: A 2-KO resistor should be in series with V to limit supply current...

  • High Toggle Rate High Frequency Analog Switch

    2015-01-12 20:53:5173

    This circuit is High Toggle Rate High Frequency Analog Switch. This commutator circuit provides low impedance gate drive to the 2N3970 analog switch fo...

  • Difference Of Squares Analog Computing (AD741KH)

    2015-01-12 20:19:5863

    This article describes the Difference Of Squares Analog Computing (AD741KH). The content is very simple, very helpful. Components in this article can h...

  • Use SCR help give fuse torn fast

    2015-01-12 19:57:0464

    If fuse slow get into trouble not good may make the circuit can is damaged. Normally fuse torn when current change too much. But more will torn must us...

  • All pass filters

    2015-01-12 19:37:3783

    An all-pass filteris that which passes all frequency components of the input signal without attenuation but provides predictable phase shifts for diffe...

  • DS1802 Stereo Digital Volume Control

    2015-01-12 19:00:02121

    DS1802 Stereo Digital Volume Control DS1802 is a Stereo Digital Volume Control IC. It consists of two 65-position, 45k digital potentiometers with loga...

  • Digital voltmeter using ICL7107

    2015-01-12 18:48:42122

    Description. The circuit given here is of a very useful and accurate digital voltmeter with LED display using the ICL7107 from Intersil. The ICL7107 is...

  • LS7220 MOS Digital Entry Lock Circuit

    2015-01-12 18:31:58113

    The LS7220 is aMOSdigital lock circuit.When wired to a ten-digit keypad,the circuit will recognize one four-digit combination out of a possible combina...

  • Digital Compass Module (HMC6352)

    2015-01-12 17:37:50100

    This article describes the Digital Compass Module (HMC6352). The content is very simple, very helpful. Components in this article can help you understa...

  • New Digital Signal Controller(F28335)

    2015-01-12 16:36:1574

    This article describes the New Digital Signal Controller (F28335). The principle is very simple, very practical. The circuit components can help you un...

  • Removing 60Hz from ECG using digital band stop filter

    2015-01-12 16:20:39102

    Lets make a filter, which filters off the 60Hz frequency from ECG signal. As we know American power supply is 60Hz. This is common noise in biomedical ...

  • Introduce active bandpass filter

    2015-01-12 15:07:0381

    Next, we briefly explain the active bandpass filter. As we all know, an active bandpass filter is the filter structure is simple using an operational a...

  • PIC Digital Clock Timer With PIC16F628 Microcontroller

    2015-01-12 13:53:06160

    Description: This circuit uses a PIC16F628 microcontroller to display 3 and 1/2 digit time and control an external load. The timer output can be set fr...

  • 1khz bandpass filter by ic lm324

    2015-01-12 12:35:59233

    When you want band pass Filter Frequency circuit 1KHz size in model easiness. I begs for to advise this circuit , because it uses , ICLM324OP-amp highl...

  • Mini project Digital Volt Meter (DVM) using PIC16F877A with

    2015-01-12 11:30:07416

    DVM Project OverviewDigital Volt Meter is a Mini Project that I made as my project of the subject Microprocessor Based Instrumentation System. In this ...

  • How to build Digital Step-Km Counter

    2015-01-12 10:53:2372

    Max. range: 9.950 meters with two digits Slip it in pants' pocket for walking and jogging Circuit diagram Parts: R1,R3 22K 1/4W ResistorR2 2M2 1/4W Res...

  • Active band-reject filter

    2015-01-12 10:24:2093

    A filter with a band-reject characteristic is frequently referred to as a notch filter. A typical circuit using a ?μ 741 is the unity-gain configurati...

  • Enhance the SRF Dash with Digital Tachometer

    2015-01-12 10:17:5867

    Are you get excited and your adrenaline speed up like the car meter, every time you watching the SRF Dash racing tournament? The SRF modifying is not a...

  • Digital pedometer circuit (BC327)

    2015-01-12 10:14:1493

    This article describes the Digital pedometer circuit (BC327). The principle is very simple, very practical. The circuit components can help you underst...

  • High Impedance DC Voltmeter using MOS Op-Amp

    2015-01-12 09:16:4772

    Figure 1 The circuit was designed for the purpose of creating a voltmeter with high impedance that would measure Direct Current voltages across any typ...

  • A 20-kHz, Third-Order Low-Pass Filter

    2015-01-12 09:14:0373

    This is a third order low pass filter that has corner frequency of 20kHz. It is twice as high as the auto-zero clock frequency. Here is the circuit : T...

  • Subwoofer Filter Circuit

    2015-01-12 08:02:37311

    This subwoofer active filter circuit is a 24 dB octave filter with a Bessel character and cutoff frequency of 200 Hz. So, if you are interested in expe...

  • Digital Water Wave/Tide/Level Meter (LM324)

    2015-01-12 07:59:01164

    A simple probe can be made using insulated wire. The insulation is then the dielectric of an annular capacitor with the inner conductor as one plate an...

  • MIDI Drum Machine Analog Input Schematic (LM324A)

    2015-01-12 07:48:2177

    This article describes the MIDI Drum Machine Analog Input Schematic (LM324A). The principle is very simple, very practical. The circuit components can ...

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