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How to Use an LED With a 9 Volt Battery LEDs are light-emitting diodes. They are specifically created to emit light, whether visible, infrared or near infrared. LEDs are polarized, which means that the way they are placed inside circuits is important. They are categorized by factors such as their color, intensity, size, voltage and viewing angle. They are sensitive to current, and so must be used in series with a resistor to prevent their self-destruction. To calculate the value of the resistor needed with a 9-volt battery, use Ohm's Law. Ohm's Law is a formula where the resistance R is equal to the voltage V divided by the current I. Instructions Instructions 1 Obtain the values for the LED voltage and maximum current. This may be done by reading them off of the LED datasheet or package. 2 Study Ohm's Law to calculate the minimum value for a current limiting resistor for an LED. It is R = (Voltage Source -- LED Voltage)/LED current. 3.Calculate the minimum value of the required resistance. For example, given a 9-volt battery, and a 2-volt LED with a maximum current of 30 mA, the required resistance R is (9 V -- 2 V)/0.03 A = 233 ohms. Note that milliamps must be converted to amps by dividing by 1000. Also, the absolute minimum R should be avoided; use a 240-ohm, 330-ohm or higher valued resistor instead. 4 Wire the 2-volt LED or another low-voltage one in series with a resistor and battery. First, attach the positive side of the battery to the breadboard, and connect one end of the resistor to this side. Connect the positive side of the LED to the free end of the resistor. Place the negative terminal of the LED to ground, and then also wire the negative side of the battery to ground. The LED will light. dm8000 hd wholesale led light usb flash drive usb flash drive wholesale usb flash drive flash drive manufacturer led lighting LED Wall Wash light LED video pixels LED Digital Tube light LED Spot Light LED Point Light LED Under-ground Lighting LED Commerical Lighting LED ba?ador de pared LED píxel de luz Tubos LED luz llevada del punto LED punto de Luz lenovo cellphone LED Spotlights Buried LED Iluminación Comercial ????? ????? ??? ????? ???????????? ????? ???????? ???????????? ?????? Power supply for DM500C DM500S DM500T Remote control for DM600PVR DM7000 DM7020S DM7025 Power Supply for DM600PVR DM7000 DM7020S DM7025 dm8000 hd dreambox dm8000 dm 8000 hd dreambox 8000 dreambox dm7020 dm7020 HD dreambox 7020 dm7020 HD dreambox 7020 Dreambox dm800 HD Se dm800 hd se with Wifi dm800 hd pvr dreambox dm800 hd pvr cheap dreambox dm800 hd pvr http://www.dreamboxok.com/dm500si.html Dreambox dm500S satellite receiver http://www.dreamboxok.com/Dreambox-DM-500-S.html DreamboxDM 500 OEM http://www.dreamboxok.com/DM500-OEM.htm Dreambox DM500C http://www.dreamboxok.com/Dreambox-DM-500-C.html Dreambox DM500C OEM http://www.dreamboxok.com/dm500c-oem.html Dreambox DM500S OEM http://www.dreamboxok.com/dm500s-oem.html Dreambox DM500Si Silver http://www.dreamboxs.com/dm500si.htm Dreambox dm500Si black http://www.dreamboxok.com/dm500si-black.htm Dreambox dm 518S http://www.dreamboxs.com/dreambox-dm518s.html Dreambox DM500T http://www.dreamboxok.com/Dreambox-DM-500-T.html AzBox HD Elite
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