On 6/19/2013 1:10 PM, Tony Duell wrote:
Of the other 2 solutions, it's not so celar which
is the simpler one. The
2 transistor circuit certainly has the fewest active components. But it's
harder to design than the 555 circuit, and the 555 is not hard to fully
understand (I sometimeswonder if anyone actually reads the 555 data sheet
rather than jsut using the ocmmon circuits, it's well worth doing that).
Practically, which I used would probably depend on the components I could
quickly find.
Now that I think about don't they make flashing leds.
-tony
Ben.