I've had the transistors since 1983 or '84, little drawerful of them, and decided I was finally going to use them for something, so I did.
Ha, ha, ha! I also bought '2 many' 2N2222's (near 100) in the mid 80's which I still keep in a little drawer, but I never got to use them. And that's 2 many 2's and 2 many transistors. I'll have to find some use for them one of these days. XD
My dad gave these to me when I was in college.
Always did op-amps and higher level logic design, never had a project to work these into.
Can't even find a datasheet on them!
They seem to work well enough for driving strings of LEDs tho.
CrossRoads:
Sometimes a single transistor or two (and associated resistors) is all you need.
For example, on this board (in various stages of construction) I used 4 transistors and 11 resistors to control 4 strings of 5 LEDs each, 1 string of 3 LEDs, 1 LED, and to invert a signal.
A ULN2003 or 7406 with 4 resistors would have done the same. I've had the transistors since 1983 or '84, little drawerful of them, and decided I was finally going to use them for something, so I did.
Well that's pretty close to what I'm doing. Reassuring to hear I'm on the right track.