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  1. R

    Making a high speed pulser

    Hi, all. I need to pulse each sensor in a stack of of roughly 1500 sensors. There has to be about 20 microseconds in between pulses, or else my 100khz counter will lose tract. I tried using a LDR that fired a LED... which in turn fired the next LDR and so on. With a small cap in each...
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    help connecting 555 timer

    Since you want to know what I am trying to do, here it is: 2,688 special miniature infrared sensors have been stacked and staggered into a shaft 7 feet long at 1/32 on an inch apart from each other. Even with 32 point PLC input cards, I would need 84 of them to send all those inputs to the...
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    help connecting 555 timer

  4. R

    help connecting 555 timer

    Thank you so much for your reply. As each of these timers time out and pulse on, they will check a corresponding sensor for an input. Example: If after the system trigger (starts the 1st timer), a sensor input is returned after .93 seconds, then the PLC can determine it was the 93rd sensor...
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    help connecting 555 timer

    Hi, all... Im just starting in electronics and I thought being a master electrician would make it easy. Maybe a little? I need help connecting a 555 timer. I have a manual on the 555CN, but it is like 19 pages long! It's more confusing every time I read it. First, is it possible to...
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