Hi,
I am going to be making my own common cathode 7 segment display using 14 LEDs arranged as so:
where each 'X' represents an LED. Each pair of LEDs will be connected in series and will have the appropriate resistor attached. The display will be driven by a CMOS 4511 or similar (the CMOS 4511 is a standard BCD to 7-segment display driver).
What is the minimum voltage to be able to power all 14 LEDs (such as in the number 8)? Assuming each LED has a forward voltage of 2.1V:
2.1 * 14 = 29.4 volts
I know this isn't right, can someone please show me where I have slipped up?
Thanks,
I am going to be making my own common cathode 7 segment display using 14 LEDs arranged as so:
Code:
XX
X X
X X
XX
X X
X X
XX
where each 'X' represents an LED. Each pair of LEDs will be connected in series and will have the appropriate resistor attached. The display will be driven by a CMOS 4511 or similar (the CMOS 4511 is a standard BCD to 7-segment display driver).
What is the minimum voltage to be able to power all 14 LEDs (such as in the number 8)? Assuming each LED has a forward voltage of 2.1V:
2.1 * 14 = 29.4 volts
I know this isn't right, can someone please show me where I have slipped up?
Thanks,