Target : Display a number with a 7 Segment LED Diplays.
How : The 7 segment LED display is connected to the BCD decoder 74HC4511. specifying the number to display using wire prototyping on lines 0/5V and BCD entries on the decoder. The arduino is just to provide the supply voltage
Wiring : Wire the display and the decoder.
Technology : We will use 220ohms resistor to limit the current in the LED of the display as shown in class01. The entries LT( Lamp Test) , BL ( Blancking) must remain in the HIGH state, the input LE (Latch Enable) in the LOW state. ( see the function table on datasheet)
Components : 74HC4511, 7 segment LED Display, resistor 220 Ohms
Warning : not directly connect an output of the decoder to an input of the display, interposing a 220 ohm resistor to limit the current in the diode of the LED.
