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On the one hand, I really thought the ULN was always more expensive due to added features. Actually, the ULN is the 7-output version we used to use. Comments 8 Comments sorted by Date Added Votes. On the other, the ULN is the easiest to wire up as the pin arrangement is quite clean. 7l4s07 mostly seem to expect the BasicStamp to do everything.

But, I really want to focus on the IC packaged devices. Thank you for the correction because Googling the wrong number leads nowhere. Transistors cost least but they aren’t in a DIP.


Kramer, did you mean ULN? Either way, if you burn a gate you lose the whole package.

74LS07 Hex Buffer IC

Well, I seem to be hopeless at getting these IC numbers correct from memory. It is always sunny and warm here And with the 74LS06, one can invert logic so that states of output cannot possibly conflict. Of course, if you really need power, the 2N remains even more useful. Post Edited Beau Schwabe Parallax: Beau Schwabe — Submicron 74ls7 Engineer www. Each is paired and next to each other.

74LS07 – Integrated Circuits > 74 Series – Electronic Component

I am just try to figure out which contexts are useful to either protect the BasicStamp or to eliminate some of the more mundane work load. I suspect a lot of us overlook the meaning of ‘open collector’ when we are selecting chips.

But it will handle switching voltages up to 30volts 74ls70 power up to 40ma. Since the outputs are in 3-states, are they merely redundant or can be used creatively with a BasicStamp?


Quick Links Categories Recent Discussions. Hwang Xian Shen, Puddleby-on-the-Marsh. Chris Savage Parallax Engineering Posts: I personally feel the 74la07 is a great protector of output pins and a good driver for LEDs, especially the newer, brighter ones.

Sign In or Register to comment. It can also easily adapt to driving relays and small motors.

All things considered, I can live and thrive without Microsoft products. In concept, the point is that there are other driver ICs that offer interesting choices including latches and buffers that can be bidirectional.

So I wonder why it is often ignored? LINUX is just fine. Everyone seems to turn to the ULN as a driver for several reasons. One is that it has 8 lines in parallel.