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  1. M

    need a switch that will deactivate with man overboard

    My mistake. I checked out the first link, and saw the same item that I saw elsewhere. On the second link, I see a lot more variety. I'll go w/ one of those.
  2. M

    need a switch that will deactivate with man overboard

    thanks for the replies. The commercially available switches seem to have poor reviews, stating that if used several times, the switch would likely break. I don't know if this is the case, and I hope to never be in a position where the switch is actually pulled, but I'd like to use something...
  3. M

    need a switch that will deactivate with man overboard

    I have a trolling motor hooked up to a canoe. I need a "dead man's switch" to de-energize the motor if I should fall overboard. This isn't being hooked to the power supply, but rather to a PWM, so current and voltage are low. I have a reed switch, but see a disadvantage: to make it work, I...
  4. M

    Two potentiometers on a pulse width modulator

    Thanks for the replies. I'll have to mess around with this. I might decouple the two, since it might be useful to have a killswitch. Furthermore, I can actually find a waterproof pot, whereas I can't find a waterproof dual-gang pot or a waterproof pot/switch combo.
  5. M

    Two potentiometers on a pulse width modulator

    sadly, I don't. This is it, though: http://www.ebay.com/itm/10-50V-60A-DC-Motor-Speed-Control-PWM-HHO-RC-Controller-12V-24V-48V-3000W-MAX-/301247561012?pt=LH_DefaultDomain_0&hash=item4623c0fd34
  6. M

    waterproof dual-gang potentiometer?

    thanks
  7. M

    Two potentiometers on a pulse width modulator

    I have a pulse width modulator with a dual-ganged potentiometer. I've seen other PWMs with two potentiometers, rather than the single dual-ganged. What two parameters are controlled by the potentiometers? I'm using mine on a trolling motor. If I were to decouple the parameters by using two...
  8. M

    waterproof dual-gang potentiometer?

    For the joystick, it seems easy enough. I'm wondering about the traditional potentiometer junction. This is for a pulse width modulator which is to be hooked up to a trolling motor on a canoe. I wonder if a dual-gang potentiometer is necessary. I have this controller...
  9. M

    waterproof dual-gang potentiometer?

    I'll look into the joysticks. As for the housing providing the protection, there's an inner shaft that rotates w/in the outer shaft. are you saying that water won't get in gap? Is it packed with grease or something?
  10. M

    waterproof dual-gang potentiometer?

    I've been looking for a waterproof (or at least splash-proof) dual-gang potentiometer and have not had any luck. Ideally, it would be 100K, but this isn't an absolute requirement. Does such a component exist? Thanks.
  11. M

    protecting leads on a jack?

    I have a barrel jack made by Switchcraft that I intend to mount through the enclosure of a project. Unfortunately, the enclosure will need to be opened for service regularly (it's just the nature of the project). On the inside, as things currently are, I'll have the soldered leads connected to...
  12. M

    Using a DC motor speed controller as an "off" switch?

    thanks
  13. M

    Using a DC motor speed controller as an "off" switch?

    I purchased this DC motor speed controller: http://www.amazon.com/gp/product/B00F839VNQ/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 Now, I have another aspect of the project. Here, ideally, I'd have a motor that would be either off or on (with varying speeds). When experimenting with this...
  14. M

    jack/plug type for DC power?

    right. I realize that by switching, I'll have to swap all the connectors. With the radioshack components, size mismatch wasn't the issue.
  15. M

    jack/plug type for DC power?

    I'm putting together three projects involving motors that will run off of a 12V "wall wart" power supply. I picked up some radioshack size "M" coaxial connectors. These are cylindrical plugs that go straight into the jacks. I've had problems with these. A jack provided a poor contact, so I...
  16. M

    help with voltage divider

    thanks, I appreciate it.
  17. M

    help with voltage divider

    stall current = 850 mA
  18. M

    help with voltage divider

    Thanks for the prompt reply. On Amazon, there are quite a few switching regulators. Beyond supplying current of at least "stall current level" to the motor, and being able to convert voltage from 12V to 6V, what other factors should I look for in a switching regulator? Are any brands...
  19. M

    help with voltage divider

    I'm building a simple circuit based on a 12V DC power supply. I want two motors to run at the same time. One motor is rated for 12V, and the other is rated for 6. I understand that I can have a circuit that runs from the power supply, to a resistor, which leads to another resistor, and...
  20. M

    grounding dc circuits

    ok, thanks
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