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  1. chopnhack

    Automation seems easy but what am I missing?!?!

    LOLOL - We are in the same boat. I have been smitten by that bug for a long time - years before I even came here, just didn't have the resources or skills to start. My project was uncomplicated too, LOL - see my pictoral of what the circuit should be. Caveat - once you start, and its a worthy...
  2. chopnhack

    shockwave plugin crashing

    Is anyone else getting an error with shockwave plugin crashed? Chrome ver 53.0.2 on win7 - yes win7 cause i like to hold out ;)
  3. chopnhack

    Automation seems easy but what am I missing?!?!

    LOL, good for you! It took me 2.5 years :D:eek: I would suggest a trial run with one gate at a time including your time delay before committing too many resources. That way you can tweak your prototype as you inevitably find improvements as the design progresses. Cheers
  4. chopnhack

    Automation seems easy but what am I missing?!?!

    Well, I see no way around this - you have a separate extractor for the treated wood, presumably you are swapping the main trunk connection between DC's. That means that all the drops stay the same, just the extractor is moved. That shouldn't take very long, well... then again, that all depends...
  5. chopnhack

    Automation seems easy but what am I missing?!?!

    That would be the simplest implementation, but also the least intelligent in the sense that it will be a simple on/off with the tool that you tap into.
  6. chopnhack

    Automation seems easy but what am I missing?!?!

    Well, you could put a transformer into each machine just past the power switch such that the transformer energizes with the machine, but you still would need to work out timing, which can still be done, the 24vdc can be the start signal. You would then need to keep each 24vdc pulse separate so...
  7. chopnhack

    Automation seems easy but what am I missing?!?!

    Yikes, that would be an impressive mountain of shavings to witness!! Are you a subcontractor for the mill? Beautiful and the best case for automation, cheers!!! I don't think so - you would need some type of μcu to handle the timing. Arduino's are dirt cheap, you can use one and interface it...
  8. chopnhack

    Voltage Drop across NPN BJT C&E?

    No, for me part selection is part of the circuit design. I appreciate all the help, thanks!
  9. chopnhack

    Voltage Drop across NPN BJT C&E?

    I was implying my own difficulties, see post #41
  10. chopnhack

    GPS NMEA, Failover Circuit upgrade attempt.

    Ah! Well, there you have it :D If you can spare the board, go ahead and solder it up. This is your first prototype, breadboarding gets you to the prototype phase. Things that show up on the breadboard might not on the pcb and vice verse because they are two very different animals!
  11. chopnhack

    Voltage Drop across NPN BJT C&E?

    I am sorry to say Ratch (and I am not ganging up on you!), but for someone Hopelessly Pedantic, that is a very short reply on how to read a datasheet, LOL -sigh- I will start here: How to Read a Transistor Datasheet
  12. chopnhack

    Voltage Drop across NPN BJT C&E?

    Perhaps you find it easy, but I don't find it to be trivial. Especially trying to design a circuit to have a clean on/off controlled by the presence/absence of 2-3v. The difficulty I allude to is selecting an appropriate transistor to do the job based on the datasheet.
  13. chopnhack

    Voltage Drop across NPN BJT C&E?

    This is what makes it difficult for a hobbyist to use these devices as a simple switch, there is a lot more going on than a simple on/off action!
  14. chopnhack

    Automation seems easy but what am I missing?!?!

    30A is the max in the ACS712, but it can take 100A surges which makes it quite impressive in my opinion. Also makes it well suited for motor sensing, allowing for those peaks at startup.
  15. chopnhack

    Voltage Drop across NPN BJT C&E?

    Wow... The application note looks very interesting, I have only read the abstract and first paragraph, good history there. I thought the comparator would be sufficient for the LDR setup, since we only need to know on or off and not really caring for a specific triggering point nor values at...
  16. chopnhack

    Electronics Point:1 Chat Room Open!

    Real time is necessary sometimes to shorten the design cycle, very true... if both participants are available! That's what's great about the site, people assist according to there own schedules. Wouldn't I like to have Hevans, Ed,steve, ratch, lvw, collins, dave, etc. on tap - hell yeah! But...
  17. chopnhack

    Automation seems easy but what am I missing?!?!

    I think what Boyd is getting at is that he needs a delay in his off time for his D.C. (dust collector) so that it doesn't bounce on and off as machines are cycled. A delay on would be wise too so that you don't have a dip in voltage as your tool powers on simultaneously with the extractor...
  18. chopnhack

    Electronics Point:1 Chat Room Open!

    Oh, I thought I read in the original message that you had started a FB page for it and assumed you would need to login through FB to access it. I can't verify it anymore since the original post has been edited. Good on you for the efforts - if enough people are aware of it, it will prove to be...
  19. chopnhack

    Electronics Point:1 Chat Room Open!

    That might have a better turnout ;)
  20. chopnhack

    GPS NMEA, Failover Circuit upgrade attempt.

    That's a good idea! The V.reg is internally protected from thermal issues, so no worries there. Sorry I missed the part about your efforts with the caps - somehow though that stray signal is still being coupled with your signal! When you respond to Chris with I guess so, does this mean you are...
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