I am doing a timer with a 14M2 and using a 4511 to drive 2 7 segment display LED'S. The idea to display 0:0 - 1:0 - 1:5 - 2:0 upto 5.
To conserve Picaxe ports I went for a 4511 device where a combination of 4 ports switching generated digits 0-9 on 1 7 segment display.
I then saw a circuit;
I thought the transistor in each cathode of the display allowed you to individually set the value of each digit by turning on/off the display however I cannot seem to do it. Am I missing out something or does the circuit just turn of digits? Thanks
To conserve Picaxe ports I went for a 4511 device where a combination of 4 ports switching generated digits 0-9 on 1 7 segment display.
I then saw a circuit;
I thought the transistor in each cathode of the display allowed you to individually set the value of each digit by turning on/off the display however I cannot seem to do it. Am I missing out something or does the circuit just turn of digits? Thanks