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  1. CircutScoper

    2 latching relays, 2 pushbuttons, 2 dc 5 Volt motors and 4 limit switches

    Then I'd need a complete schematic that shows clearly, in one diagram, how everything is connected including the IR sensors with spec's on the sensors, relay(s), diodes, etc. Without at least that I doubt anyone here can help you. Certainly I can't.
  2. CircutScoper

    2 latching relays, 2 pushbuttons, 2 dc 5 Volt motors and 4 limit switches

    Have you tried simply connecting the motor to the power supply directly -- both polarities?
  3. CircutScoper

    2 latching relays, 2 pushbuttons, 2 dc 5 Volt motors and 4 limit switches

    Sorry, but I don't understand much of your diagram. However, this part seems definitely in error and would prevent the motor from running. Suggested corrections attached.
  4. CircutScoper

    automatic forward reverse motor with limit switch and relay

    Actually power can -- and must -- always travel simultaneously down ALL paths in amounts inversely proportional to their resistance. However, whether a motor can (simultaneously) turn in more than one direction is a question above my pay grade.
  5. CircutScoper

    Reversing polarity through signal from mouse switch

    I think the explanation is obvious. One (or both) of us is inept. Since we've already seen your circuit can't work, and I've explained why, the most plausible choice of those three possibilities seems pretty clear.
  6. CircutScoper

    Reversing polarity through signal from mouse switch

    Simple? Well, since neither of your limit switches shows any connection to their NC contact, it's simple to see this circuit can never work. So congrat's on achieving such a wonderfully simple, non-functional, worthless circuit.
  7. CircutScoper

    Reversing polarity through signal from mouse switch

  8. CircutScoper

    Reversing polarity through signal from mouse switch

    I imagine the diode will fit in the same box with the relay and ship for the same $5.
  9. CircutScoper

    Reversing polarity through signal from mouse switch

    Digikey will sell you 1 for $0.21. But if you can only buy them by the bag, take this one from the same bag you pulled the one from that protects switch contacts from coil kickback. As for mounting it, it could be simply connected between the unused NO contact and common terminals of the CCW...
  10. CircutScoper

    Reversing polarity through signal from mouse switch

    Betcha' the diode is cheaper.
  11. CircutScoper

    2 latching relays, 2 pushbuttons, 2 dc 5 Volt motors and 4 limit switches

    Congratulations!
  12. CircutScoper

    2 latching relays, 2 pushbuttons, 2 dc 5 Volt motors and 4 limit switches

    I answered, but not in very good detail. Let me try again. 1. The fundamental reason that trying to control a DC motor's speed with a resistor (or pot) is that when the mechanical friction loading a motor changes, the current drawn by the motor will also change -- increasing when friction...
  13. CircutScoper

    2 latching relays, 2 pushbuttons, 2 dc 5 Volt motors and 4 limit switches

    This is the ultimate extension of the series-diode concept. It is much simpler than your 555 based circuit and your chances of successfully using it are therefore much better. Frankly, there are so many errors in the 555 schematic you drew that I won't even attempt to correct it.
  14. CircutScoper

    2 latching relays, 2 pushbuttons, 2 dc 5 Volt motors and 4 limit switches

    You're looking at the wrong diodes. Check out D1 and D2. Please recall that, per my original suggestion, there remains another solution: More pairs of diodes. 7 pairs, for example, would be guaranteed to stop the motor completely, since 7 x 0.7V = 4.9V. Somewhere between the 1 you have now...
  15. CircutScoper

    DC Motors and speed control

    On second thought, maybe best to forget the whole thing, given as little as we know about the "scooter" in question. If Rudy WERE successful increasing motor torque, maybe that would cause the gears to strip, wheels to skid, or his antlers to fall off!
  16. CircutScoper

    DC Motors and speed control

    Of course. As said Torque = Power / Speed. At constant Power, Torque can only increase at the expense of reduced Speed. The advantage of doing it by lowering the gear ratio is that it might be possible without re-engineering the whole powerplant.
  17. CircutScoper

    DC Motors and speed control

    May I call you Rudolf? As has already been said, Rudy, basic physics dictates a fundamental tradeoff for any given power rating between rpm and torque. Your 350W motor rating is equivalent to roughly 1/2 horsepower (actually 0.47). At 3000rpm, that works out to ~1.6 foot-pounds of torque...
  18. CircutScoper

    2 latching relays, 2 pushbuttons, 2 dc 5 Volt motors and 4 limit switches

    It's possible, but you'd first need to measure the current draw of the motors to be able to estimate the resistance (R = V / I) and power rating (P = I^2 R) needed. Then, in operation, the resulting speed regulation from a rheostat would be inferior to diodes, causing a greater tendency for the...
  19. CircutScoper

    HOW TO Convert 12v to 13v

    Pry it open and take some photos of both sides of the circuit board. It's just possible the brainacs here (not me!) will be able to suggest a workable modification -- provided you're good at soldering.
  20. CircutScoper

    A simple electric fence idea

    Well, maybe it's not a good idea to get too dogmatic on this subject. It seems that the supposed safety of ANY electric fence design is only a relative thing. Per the old saying: You pays your money and you takes your chances. Electric fences and accidental death Michael Burke 1 2, Morris...
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