Komputer tips

The circuit above can control speed of your DC motors or Computer Fans.If you use this to control speed of DC motors please use a diode to protect the Transistor,brush-less fans -OK.You can change the variable speed range by changing the value of R1 potentiometer.But don't use very high values,its pointless. The transistor used here is a NPN 2n3055,it can handle up to 15A and 115W of power.And this transistor can handle up to 60V.So if you're using this for PC fans you can add more in parallel.Normally a computer fan uses about 0.4W of power.Some powerful ones may use about 7W of power.If you don't use so much power then you can use a low power transistor like C1061,D313 etc. If you don't want to change the speed too often or hard to find a potentiometer or just willing to make this out of scrap you can use a Trim resistor for R1. The transistor may heat up very much and its essential to use a Heat sink.If you can,do not solder the transistor to the PCB s...

How To Make A Very Bright LED Flasher For Your Webcam Unlike the handy cams or DSLRs the webcams need more light for clear images.As you use it for mostly video conferencing they have designed it optimized for video recording.It may have been a trouble for you to turn your room's light off while on the bed with your laptop after a conference in the night.Latest laptops have a small LED flasher built in,but trust me it is not even enough to light up your nose.In this post I'm going to show you how to make a LED flasher for your Laptop or Desktop webcam.But first you'll need to find these items.Don't worry it won't cost more than 3 bucks.Let's get it started. Oh first forgive me for low quality photos.(Unavoidable reason)Comment if you have any problems with photos). Things You Need #1.A USB cable.You just need the port showed in the picture with the wire.Can use your old broken phone cable. #2.1 WATT LED bulb with heatsink.You can also use more p...

The facebook like box will greatly increase your site's fanpage likes.It's very beautiful and motivating people to like it.You can install this gadget to your blogger or wordpress blog easily.Here I will show you how to add it to blogger. First of all you need a username to your fanpage.Like www.facebook.com/komputertips. You can make one to your fan page using this url www.facebook.com/username. Now you're ready to go #1. Go to https://developers.facebook.com/docs/plugins/like-box-for-pages #2. Give your fan page url to the Facebook Page url field.Enter width and height matching your gadget location.I used 300px by 300 px as I'm placing it at the sidebar #3. Click on Get code #4. Then select IFRAME tab.Copy all the code in the box #5. Go to blogger Layout > Add a Gadget and Choose HTML/Java Script , paste the code there and save       it.Leave the Title empty! Please give us a feedback with a comment or a like to our fanpag...