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  1. CDRIVE

    How can i add a trigger to this circuit to make it not electrocute the user?

    FYI, when you wait a month in between posts some of us forget where we were and what we're discussing. This may be the only project you've got on the fire but those of us that are here solely for assistance to others have embedded themselves in many topics since your last post. Chris
  2. CDRIVE

    Help with sensing a stopped sprocket

    Oops, I forgot to post the datasheet link to your relay.... If you're interested. https://www.omron.com/ecb/products/pdf/en-g5v_1.pdf Chris
  3. CDRIVE

    Help with sensing a stopped sprocket

    Since attack speed is very important to you I thought it wise to check the datasheet of your relay. Fortunately the activate time (contacts closed) is only 5mS. This is slow as a snail compared to switching speeds of a transistor which we measure in nS but still fast enough to not cause...
  4. CDRIVE

    Help with sensing a stopped sprocket

    Yes it's a schematic CAD and simulator. I don't have the time or inclination to actually build all the circuits that I help with on EP but I do simulate them. Chris
  5. CDRIVE

    Help with sensing a stopped sprocket

    Do you think you'd be interested in the Picaxe VSM spice simulator? It's what I'm using to simulate your project. It's also the app that I created the schematic I posted. VSM links to your Picaxe .BAS file which holds the code. BTW, in one of your earlier posts you commented about the kickback...
  6. CDRIVE

    Help with sensing a stopped sprocket

    That's a nice package and worth every dime. Have you downloaded PE6 yet? Chris
  7. CDRIVE

    Help with sensing a stopped sprocket

    RevEd is usually pretty quick. Though you could have ordered from www.sparkfun.com here in the USA. https://www.sparkfun.com/search/results?term=picaxe Chris
  8. CDRIVE

    Help with sensing a stopped sprocket

    Uh yeah, that was a brain fart! :rolleyes: And yes that's 1/2 second. Chris
  9. CDRIVE

    Help with sensing a stopped sprocket

    I don't suppose access to the rotor shaft is easy or feasible? BTW you didn't answer my one of my questions. Is 500mS attack time still to slow? Also how fast is it running in that video? Chris
  10. CDRIVE

    Help with sensing a stopped sprocket

    Craig, I viewed your video again and I have another question. Is the motor driving the sprocket directly or is there a gear box (speed reducer) that I can't see? Chris
  11. CDRIVE

    Help with sensing a stopped sprocket

    Craig, I mentioned this before but it's worth reiterating. The relatively slow pulse rate at low speed (~3PPS) is your limiting factor in regards to attack time to kill the VFD. If there were 10 times (100 times would be better yet) pulse rate a uC would have far more data per unit of time. Thus...
  12. CDRIVE

    Help with sensing a stopped sprocket

    One of the issues I'm having is the very slow pulse count at low speed. It's only 3PPS which isn't a hell of a lot to work with. If the prox sensor was counting, let's say 10X that rate the Picaxe would have 10 times the data to work with. In turn the Count (period) function could be shortened...
  13. CDRIVE

    Help with sensing a stopped sprocket

    Craig, since I made no secret of paralleling Minder's work but using a 08M2 Picaxe I do have a couple of questions. (1) Does the digital input on the Automation Direct VFD 'latch' OFF when triggered? In other words when it goes low it will kill drive to the motor. If it's brought high again...
  14. CDRIVE

    Help with sensing a stopped sprocket

    Have you been trying to physically fly on one of your models? :D Get yourself a Teeter HangUp and see if it helps you. Chris
  15. CDRIVE

    Help with sensing a stopped sprocket

    Why are you in the ER? If you're not sick now you will be! Chris
  16. CDRIVE

    Help with sensing a stopped sprocket

    "With Six You Get Eggroll". :) Chris
  17. CDRIVE

    Help with sensing a stopped sprocket

    My jaw is on the floor! Six kids yet all those toys are yours. You're definitely doing something right. Chris
  18. CDRIVE

    Help with sensing a stopped sprocket

    Damn! For a Machinist you're certainly well equipped for electronics projects! Where the hell do you find the time in between making blue chips? You're not married with kids are you? Chris
  19. CDRIVE

    Help with sensing a stopped sprocket

    Craig, do you have any 78L05's? They're a TO92 package, which takes up about 1/4 the real estate of a 7805. I don't think you need the higher current rating that the 7805 provides. I'm asking because while Minder is doing his thing with ASM I can't resist duplicating it with a Picaxe 08M2. So...
  20. CDRIVE

    Help with sensing a stopped sprocket

    :oops: That's why I couldn't find it. My defense is that old folks can't remember what they had for breakfast or even if they had breakfast. :rolleyes: Here's a freaky example of what you can look forward to when you finally get here.... Besides electronics, which was my profession until...
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