At 4/23/2008 05:13, you wrote: >The 555 is dedicated as a timing device.
...which is all it does. >The LM324 is a quad op-amp and one of the poor ones. ...which is why I said I now use the TLV2374. >As for use as a timer the 324 needs lots of glue to make it work. Depends on what you're doing. For a simple COR circuit, I find it simpler to implement than the 555. For pulse-triggered applications yes it would get a little more complicated, but for the COR circuits being discussed this isn't an issue. >If you want a op-amp I prefer the LF353 for audio and the LM358 has the >rail-to-rail service and is better than a 324. There are actually lots of choices in this area, even if limiting oneself to through-hole devices (yes they still exist!). The LMC6484 is near perfect: rail-to-rail operation & no crossover distortion issues. But for that perfection you'll pay a bit more for the chip. Bob NO6B
