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Recent content by kinarfi

  1. kinarfi

    Poly beads level detection

    what are you looking for? I assume you're not really too concerned with the weight of the content of the silo, just the level of the beads, when it's full and then again when it's at the time to refill. I'm thinking that your silo is basically a pipe stood on end with a funnel welded to the...
  2. kinarfi

    Poly beads level detection

    Why can't you use the silo walls as one plate of the capacitor if grounded. The capacitive level I made used the wall of a gas tank as such. Then depending on where the holes are in the top of the tank, a single or multiple rod or pipe could be used for the other plate, they could be...
  3. kinarfi

    Poly beads level detection

    My guess is that you have never dealt with strain gauges, a large one is smaller than a postage stamp and bonded to the metal at a spot that has been prepared (sanded smooth) and then covered with silicone (at least, that how I did it). there may be better methods. I was hoping you ad access to...
  4. kinarfi

    Poly beads level detection

    https://www.omega.com/pptst/SGD_LINEAR1-AXIS.html https://www.omega.com/subsection/strain-gages-accessories-all.html here's a start for you to look at, it says you get 10 for $70.50, so several around the base in series would give you a good span, I imagine you're looking for a max reading =...
  5. kinarfi

    Poly beads level detection

    Is it possible to post a photo of the tank, if it's 10 meters tall, I would assume it's a round tank, probably standing on 4 legs which makes it a candidate for strain gauges bonded to each leg. When I worked construction at a soda ash plant, I worked on a tank which trona oar in it and just...
  6. kinarfi

    Mini Dc motor size chart

    https://www.johnsonelectric.com/en/product-technology/motion/dc-motors
  7. kinarfi

    Poly beads level detection

    I have seen the use of strain gauges work well on tanks, one on each leg of the silo.
  8. kinarfi

    <$500 preheater

    Does anyone know of a problem with these?
  9. kinarfi

    Multi-turn Trimmer Pots - Locking the Adjustment?

  10. kinarfi

    Golf Challenge:

    This simms also
  11. kinarfi

    Golf Challenge:

    As my mother once said," there are more ways to kill a cat than kissing it to death" I think the same is true with electronics. Is there anything wrong with this modification of what you did?
  12. kinarfi

    Golf Challenge:

    I think you drew your schematic wrong, I copied it to spice and it didn't work until I changed a wire, then it simmed correctly. You had the rectified voltage going straight to the optical isolator without handling it. YES - NO?
  13. kinarfi

    Golf Challenge:

  14. kinarfi

    Golf Challenge:

    tcmtrech, go ahead and show Beau Schwabe a schematic or 2 so lurkers like me can learn from your expertise, Please. Jeff Even though it may be above my smart level
  15. kinarfi

    PWM effect on heaters.. ?

    I agree with OBWO549, just use a 0 crossing switch and keep your time constant long enough for for a full cycle of your power source.
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