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  1. CDRIVE

    Help with sensing a stopped sprocket

    As it turns I don't need that relay output. As for challenges... At this point in my life the only challenge I want is waking up on this side of the dirt!. Chris
  2. CDRIVE

    Help with sensing a stopped sprocket

    Craig, your VFD has two dry contact SPDT relays described as outputs. One of them is marked "Inverter Running". Are you using it? Chris
  3. CDRIVE

    How to control the speed of a 24vdc pump from circulating water temperature?

    I wouldn't loose sleep over it. PWM is the most effective control method for brushed motors. If your having sleepless nights over it you can always check it to see if it's abnormally hot. Doubt it though. Chris
  4. CDRIVE

    Help with sensing a stopped sprocket

    Yes, he confirmed that when I asked him earlier. Chris
  5. CDRIVE

    Help with sensing a stopped sprocket

    OK, I've managed to bring the attack time down to more than acceptable speed for a mechanical device. The trigger time from a stopped sprocket is only 200mS (0.2Sec) which is plenty fast. This delay time will hold true for your lowest speed (3.66PPS) to your highest (18.33PPS). Currently I'm...
  6. CDRIVE

    Help with sensing a stopped sprocket

    Though I currently have lost interest in blank pics and dealing with ASM I did find MAPLAB 8.92 far more intuitive and easier to use than MAPLABX. Chris
  7. CDRIVE

    Help with sensing a stopped sprocket

    Ah, the plot thickens. It certainly explains why you don't want to eliminate the relay. Is the wallwart 12V output going to be hard wired or coaxial jacked to the board? Question: Is the sensor going to be hard wired to the board before it leaves your facility in which case your clients won't...
  8. CDRIVE

    Help with sensing a stopped sprocket

    It may well be but it certainly doesn't follow the Red (+) _ Black (-) that the electronics industry has used for as long as I can remember. The only way I see that happening is if the 12V rail is live while the Prox Sensor (Blue wire) lost GND connection. In that case I'd rather add a 1N914...
  9. CDRIVE

    Help with sensing a stopped sprocket

    They're much better for timing applications because they're far less leaky and more stable over temp than electros. Chris
  10. CDRIVE

    Help with sensing a stopped sprocket

    Craig, you're waaay too impulsive. You should have told me you were going order stuff from Picaxe. If you had I'd have told you to order some of those jacks too. That jack is the programming port. It's not required in a final circuit that contains a programmed Picaxe but that's just another...
  11. CDRIVE

    Help with sensing a stopped sprocket

    To start with a sh!t load long roll of aluminum foil that make up the plates of an electrolytic. The dielectric in the electrolytic is paper vs ceramic in a ceramic cap. Electrolytic's also leak (self discharge) and exhibit much higher (Equivalent Series Resistance) ESR. Electro's will also have...
  12. CDRIVE

    Help with sensing a stopped sprocket

    BTW, those are some off the wall colors that Cherry chose for the GS1005. Industry standards would have made them Vcc = RED, GND = Black, Out = Any Color that's not Red or Black but I would have chose White. Fortunately Electrons don't give a damn. :D Chris
  13. CDRIVE

    Help with sensing a stopped sprocket

    Here's my updated schematic using a Picaxe 08M2. I'm also posting what's inside the Proximity Sensor Sub-Circuit that's generating the pulse train. I'll be posting updated code later.
  14. CDRIVE

    Help with sensing a stopped sprocket

    Yup, I missed that. ;) Chris
  15. CDRIVE

    Help with sensing a stopped sprocket

    Minder, you probably just missed it but your PIC's Vdd isn't connected to the 5V rail. Chris
  16. CDRIVE

    Help with sensing a stopped sprocket

    Yeah I hear ya Craig. I could rant about what contemporary society has done to the male child for hours on end. Especially if I'm imbibing. I get much smarter then. :rolleyes: That said I'll end it here because chit chat banter is best placed in the Members Lounge. While our Mods and Admin are...
  17. CDRIVE

    GPS NMEA, Failover Circuit upgrade attempt.

    LT Spice IV. Also check out Tina-TI at the Texas Instruments website, Chris
  18. CDRIVE

    Help with sensing a stopped sprocket

    You don't understand. Somehow my bloodline's ("Git er done") hands on gene that had been passed down for generations skipped that boy. He's a product of today's schools that are devoid of wood, metal and electrical shop. I think the realization that a mere human built those engines will forever...
  19. CDRIVE

    Help with sensing a stopped sprocket

    This is absolutely disgusting! Both of you should be banned for posting such blatantly salacious machine porn! My 22 year old grandson saw that stuff on my PC. Now how the hell am I going to explain this to his mother? Oops he just had a birthday. That would be 23. :p Chris
  20. CDRIVE

    GPS NMEA, Failover Circuit upgrade attempt.

    Good to hear. Now all you need to do is start using a decent schematic editor that puts junction dots where they belong. :rolleyes: I recommend free LT Spice or Tina-TI. ;) Chris
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