Interfacing of LED with 8051 Microcontroller
LED INTERFACING 4.1 Introduction When you need to add light to a model, an ordinary filament lamp is the first thing that springs to mind. But if you don’t need a high light output, or you need light as an indicator, an LED has many advantages over a lamp. LEDS are basically the single light display that include incandescent and are treated as single binary points to be switched on and off by programmer instructions. The individual light display is easy to use. A port presents a bit or a character and then strobe the device. 4.2 ADVANTAGES OF LEDs 4.2.1 Shapes and Sizes : LEDs are available in many shapes and sizes, some of which are shown in the selection below. The 'standard' LED shape is the 5mm diameter domed type, and the smaller 3mm domed type is also popular. 1. Tri-LED array 2. 10 segment bar displays 3. Domed LED sizes 3, 5, 8, 10mm 4. Panel mounting LED 5. PCB mounting LED 6. 26mm red & green LED cluster 4.2.2 Colors : LEDs have traditionally been red, oran