4-digit seven segment display

[s2301931]

how can i use a 4-digit seven segment display for displaying some data using a 2-to-4 decoder instead of transistors for the multiplexed display.

 

[Papabravo]

What do you have against the poor transistors. What did they ever do to you?

 

[ljcox]

how can i use a 4-digit seven segment display for displaying some data using a 2-to-4 decoder instead of transistors for the multiplexed display.

Assuming you have common cathode displays, you could use a 74HC139.

Design for a LED current of 6 mA and parallel the inputs and outputs since the max output current is 25 mA and you need 6 * 4 = 24 mA which is close to the 25 mA limit. So you can guard against this by paralleling the 2 sections.