Reflective Opto RPM Sensor

[Chris Smith]

Robert, a lens will increase/adjust your focal point and give you many variations. <p>If you use a collimating lens, you can do any distance, short or long, with no adjustments needed to the lens. The only limit will be the sensitivity of the pick up and strength of the LED. <p>Failing this a simple [adjustable] lens can focus a general area and distance within your given parameters, giving you the strongest possible signal at those distances. Adjustable means you can change your mind on the distance. <p>Ed, so you do know kathy? <p>I was just going through her emails from several years back, and that very same thing was in her Email! <p>From her letter....<p>Butterflies taste with their feet.<p>A duck's quack doesn't echo, and no one knows why.<p>In 10 minutes, a hurricane releases more energy than all of the
world's nuclear weapons combined.<p>On average, 100 people choke to death on ball-point pens every year.<p>On average people fear spiders more than they do death.<p>Ninety percent of New York City cabbies are recently arrived immigrants.<p>Thirty-five percent of the people who use personal ads for dating are already married.<p>Elephants are the only animals that can't jump.<p>[ August 28, 2005: Message edited by: Chris Smith ]</p>

[labview1958]

If I change the 5V dc from the main suppy to a 6V dc from a battery, would the noise be reduced. The main supply is AC and converted to DC.

[dr_when]

Sorry,
The Mythbusters already (and not the only ones)debunked the nonsensical "duck quacks don't echo" myth. From the looks of the list, many more are just myths with no logical foundation.<p>[ August 29, 2005: Message edited by: dr_when ]</p>

[Will]

Edd,
I have some difficulty in believeing the one about the QE2 - I make that about 2 million cubic feet of diesel for the 3,000 mile voyage from Southampton Water to New York - wouldn't that just be about the volume of the whole ship ?

[Gorgon]

<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by labview1958:
If I change the 5V dc from the main suppy to a 6V dc from a battery, would the noise be reduced. The main supply is AC and converted to DC.<hr></blockquote><p>Why don't you use the +5v output from the 6025 card, and no external power at all??<p>The specs on the 6025 say you can draw 0.7A from it.<p>TOK

[jwax]

Edd-
"Scientists have invented a computer chip called the nanotubule that is 10,000 times thinner than human hair. Actually....it was made on the same type of machinery that slices the roast beef at Arby's"
I'm gonna need an explanation of that!
Not to discourage home brew, but I bought a phototach from Circuit Specialists for $39.

[Chris Smith]

"The shot heard around the world", only today it’s the joke heard around the world Via Email. <p>Once it starts, every one is passing it along, with their virus included? <p>I say Blame it on Kathy? Everyone knows a Kathy.