Linux, programming and more
Calculating LED resistor value, this is very easy and the most of you had this in the school.
A typical LED requires 20 mA and has a voltage of 2 V across it when it is working. The power supply for the circuit could be 9 V – Block battery.
For the right calculation you need three values:
1. Power supply (Your Battery 9 V)
2. LED voltage (2 V)
3. The current flowing (20 mA)
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It was another great weekend with DIY idea:)
Its a kind of mini lamp for the desk with nice colors.
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Sometimes in the evening is music great to relax or to hear to it incidentally while you do something.
I combined light with music – no so extreme like in the disco.
I bought some LEDs and a couple of TIP31 transistors. Transistors are the main key to the result! The first test was done on a breadboard.
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Ambilight-TV is great, why not for your home monitor?
Build your own ambilight for home PC!
What you need:
– 2 Cold light cathodes (Length: 316mm)
– 1 Inverter
– 2 Cables about 1 meter
– Solder, Soldering Iron and equipment
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