turnonoff blink led arduino PC

Turn on, turn off, and blink LED with Arduino board via computer/laptop/notebook/netbook/PC.

What are needed to turn LED on, turn LED off, and blink LED with Arduino? Exactly the first is Arduino board, then what else?

Breadboard
Red LED lamp
Resistor 150 Ω
Jumper Wires

Why do we use 150 Ω resistor?
Because we will string up components like this picture below:

Certain, what we want is LED on with maximal bright due to LED’s ability. More large current flow on LED, then more bright LED’s light, however very important to known that current range is allowed is 10 mA – 20 mA and range voltage is 1,6 V – 3,5 V due to its color character produced.

Voltage work/voltage drop on a LED due to color produced:

1. Infrared : 1,6 Volt
2. Red : 1,8 – 2 Volt
3. Orange : 2,2 Volt
4. Yellow : 2,4 Volt
5. Green : 2,6 Volt
6. Blue : 3 – 3,5 Volt
7. White : 3 – 3,6 Volt
8. Ultraviolet : 3,5 Volt

Acconrding to LED Red diffused 5mm datasheet, maximal V_F (tegangan work) is 2 Volt, as while voltage is produced of PC USB is 5 Volt. According to Kirchoff Low about voltage at picture above:
V_Sumber = V_LED + V_Resistor

If current flow more than 20 mA then LED will be burned. To keep LED is not burned, we need... READ MORE HERE