Variable duty cycle and frequency with a 555

oscillating at 5Hz, so I dont think that is an issue here

edge speed ??? you mean harmonics ??

The obvious question is why would you bother?

oscillating at 5Hz, so I dont think that is an issue here

The faster waveform rise time means that the higher harmonics of the fundamental remain significant. In the limit that the waveform becomes a delta function like spike then all harmonics are present with equal weight. A real narrow pulse has finite width. I presume this is a device designed to destroy MOSFETs and CFLs in roughly equal numbers!!!

BTW be careful if you end up flashing bright lights at frequencies in the 5 to 15 Hz range as if you are even slightly prone to epilepsy at the wrong frequency you could end up on the floor twitching in a fit.

What do they feed those? Sure it ain't made from chicken droppings?

Here, in AZ, a number of fish "varietals" (and shrimp) are grown is man-made ponds, with known good fish hatchery stock.

What they feed them, I don't know. But I understand the chicken-dropping-fed variety are known as NOLA-style >:-}

Speaking of chickens, until my oldest son started raising chickens on his ranch, I didn't know that chickens are carnivores... and they just love any sort of bird or snake that gets too close, and scorpions are their special treat ;-) ...Jim Thompson

coil.

only oscillating at 5Hz, so I dont think that is an issue here

edge

Not perfectly, but yes. The fast edges mean lots of high order harmonics. To help with the idea 1 microsecond edges mean plenty of 1 MHz range content, likewise 1 nanosecond edges mean plenty of 1 GHz range content.

?-)

Hmm. Make that omnivores, the eat grain as well as worms, grubs and insects when they get feral.

?-)

Yep, They'll eat just about anything, though not tin cans, like his goats ;-) ...Jim Thompson

You have the date wrong...

Date: Sat, 27 Apr 2013 10:03:31 -0700 Message-ID:

And the rule does not apply to anyone posting anti-American slurs >:-} ...Jim Thompson

How about solution-oriented newsgroups? Eg.

sci.electronics.555 sci.electronics.PIC sci.electronics.sallen.key sci.electronics.howland

Problems should be posted in an appropriate group for that solution.

sci.electronics.12.angry.men (plus or minus a few)

You forgot:

news:sci.electronics.braying.donkeys ;-)

Then we'd need another group

sci.electronics.tell-me-how-to-define-what-I-think-I'm-trying-to-do.

Mike doesn't realise that this is actually an alias of

news:sci.electronics.redneck.opinions

set up for mutual admiration sessions between him and Jim.

Well, if you get to choose (after the fact) when and where you will live by your vow, it ain't much of a vow. Take the high road - the view is much nicer.