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  1. Minder

    How do I run a dc motor slowly?

    You probably could use something along these lines? http://www.romanblack.com/onesec/DCmotor_xtal.htm M.
  2. Minder

    Solenoid Help

    In series higher voltage, the current goes up proportionately and each battery see the same current. M.
  3. Minder

    pic input/outputs

    Most have weak pull up's capability, but customarily a external pull up is used. I use a logic level mosfet for any output that requires current. A 2n7000 is useful for starters. Inputs are high impedance. Do you have a particular micro No? M.
  4. Minder

    Solenoid Help

    What is the coil resistance? M.
  5. Minder

    Ideas ?

    Mains Neon indicator lamps are very cheap and consume no current (to speak of). They come in a simple panel mount holder. M.
  6. Minder

    How do I run a dc motor slowly?

    A stepper motor is designed to operate at the rated plate current at all times , this will tend change due to the increase in inductive reactance change as rpm increases, therefore a drive is required that maintains the rated current regardless of rpm, this involves a P.S. that is well above...
  7. Minder

    How do I run a dc motor slowly?

    What phases are you talking about? Not a stepper motor?? Most currently available DC motors are P.M. field so only two conductors for the armature. The resistance of a DC motor is rather meaningless as the current depends on the load. The actual resistance only comes into play at zero rpm if...
  8. Minder

    Black & Decker Kr603 600w Type 2 Drill

    What form of motor? DC ? Universal? Other? OK it looks like a Universal, so check the brushes and cord. M.
  9. Minder

    Basic PIC18F4520 TX/RX question

    You may want to look at the Usart code in an app note on the Picmicro site, it gives examples in Assembly. I can look up the app No if you cannot find it. A couple I believe are AN774 and AN777 For testing communication there is a free pgm out there RS232HEXCOM. which makes it very easy to...
  10. Minder

    Newbie needing help - arcing relay

    +1 on the test for low coil voltage, it looks like 12vdc for this relay, the coil and contact are on the front so it should be possible to measure easily. Is it dropping out and in sporadically when it shouldn't? M..
  11. Minder

    Newbie needing help - arcing relay

    With that kind 0f load I would expect arcing. Repairing a few recent appliances of which just about all were relay problems, I found that not only the relays appear woefully small for their current ratings, especially when inductive loads (motors) are involved. If you have sufficient room I...
  12. Minder

    Can't identify piece of equipment

    RS232 data logger for send/receive and record on tape. 25pin D was the standard COM port back then, before the current 9 pin. M.
  13. Minder

    Treadmill board schematic needed

    Don't have for that board, but the usual suspects are the power devices, that appears to be a PWM version so the 3 semis on the HS could be tested. M.
  14. Minder

    motor run-capacitor testing and identification

    6 or 6.3 is close enough not to make that much difference. We are not dealing with precise equipment here. M.
  15. Minder

    Non invasive current monitor

    Several non-invasive transducers available, Honeywell make a wide range, there is also the ACS712, available on its own or on a board on ebay for a couple of $$. M.
  16. Minder

    motor run-capacitor testing and identification

    Here you go. https://www.digikey.ca/product-detail/en/kemet/C878AF24600AA1J/399-13884-ND/6558712 It is slightly more on the Can site. M.
  17. Minder

    motor run-capacitor testing and identification

    I usually buy CDE N.A. made. I assume this is a 120vac pump so 400/400v should be ample, do you have any motor rewinders in your area, or motor suppliers? That could be a first place to try. DMF series from Digikey also. Mouser sells CDE. M.
  18. Minder

    motor run-capacitor testing and identification

    If you do get a replacement make sure it is a AC Motor Run type, also do NOT by any Chinese versions. M.
  19. Minder

    Solenoid Specification Forces

    Depends on the actual application, but its seems like a little overkill to me. M.
  20. Minder

    Solenoid Specification Forces

    10mm is a little short to use a linear actuator. If you need both push/pull I would consider a double ended solenoid with two coils. How is the solenoid returned on the present one? M.
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