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"Good Electronics Project Design References and Tips Can Accelerate Your Practical Know-How in Electronics."

"Electronics Project Design References and Tips"

DO YOU KNOW ABOUT ONLINE OS?



Glide OS is a web OS .It works as like a OS . The interface is much like of Windows Vista. The most lovable part of this service is that it is completely free for the storage of up to 10 GB, quite big for online storage isn't it? But you have to pay a nominal amount for service of bigger capacities.It have its own image editor,calander,such things Glide OS has a few built in applications that comes in handy when in need. For example, it has a built in word processor, you can create presentations and spreadsheets and it also had a media player that can play almost all the common audio / video formats. You can also check your emails with the integrated mail management tool. It also has a few vista sidebar utilities lookalikes like sticky note, calculator, sync tool etc. You can upload or download files between the PC and Glide OS at anytime. And thats no all, it also gives you an option to create your own website also with some really cool design tools. I have used it for a while now and i have come along with these reviews. Plus: Free online data storage, No need to carry Laptop or HDD all the time, Integrated word procesor and other utilities, works with alomst all OS and browsers, Easy to use interface.Image editor,calculator,etc Minus: It is difficult on slow internet connection, take time for data transfer, Cannot work on mobile broswers with full functionality, Requires Flash 10 or higher, Cannot install additional programs. Sign up..... http://www.glidedigital.com/

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PWM Circuit for Motor Speed Control


How we slow down a brush type DC motor?. The most efficient way to do this is with a pulse width modulation (PWM) technique. The hobby circuit below can operate from about 3 volts to 15 volts. The frequency is fixed at about 2KHz but the pulse width can be varied from nearly 100% to 0%. By using a multi-turn pot, you can accurately select the desired motor speed. With the components indicated, the peak motor current can be about 2 amps. For higher currents, you will have to use an n-channel FET with a lower drain to source resistance.This same circuit we can done with a op amp astable multivibrator wit varying duty cycle circuit.

Simple LED chaser



Above. This is the schematic for a very basic 10 LED chaser I built. I prefer my "chasers" to run more slowly than most people and used a 10 uF capacitor for C1. The 10K pot can reduce the flash speed from not moving to whatever minimum time constant is possible with the C1 value you choose. Don't bother with ultra-bright LEDs for these "chaser" projects as cheaper, lower millicandela (mcd) LEDS work fine. I favor blue and green LEDS. The 4017 decade counter is a fabulous part and can be driven to flash a row of LEDs with a 555 timer chip or astable multivibrator .
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