So, I am working on a small project and forgot to order PNP transistors to switch the power to two common-anode 7-segment displays. Like this, for example:
All I have in hand at the moment is a series of NPN transistors but I can't think of a proper way to use them in a similar way as above.
I thought to use a simple HEX inverter like so:
But the supply needs to pass at least ~150mA or so for 7 segments and the 74LS04 I have is not rated for such current drive.
Worse case I can do the above and multiplex the 7 segments to stay within the current ratings for the HEX inverter, but I was first trying to come up with a solution using an NPN transistor alone.